Monday, June 7, 2010

4G13 and 4G15 Modification From Mild to Extreme

This post is created for those who wish to modify their 4G13 and 4G15 from mild to extreme machine. From what I understand, a lot of car enthusiast wish not to go through all the hassle of transplant an engine and they prefer to play on their factory fitted engine. Some will say that you won't gain any knowledge by just putting in a powerful engine without going through the "step by step" modification experience.

Ok, let's start with the 4G13 engine. It is 1.3 liters engine which is known as economic fuel consumtion engine. 4G15 is 1.5 liters model is the base range model and produced a little more HP compare to 4G13. The 1.5 engine is very much your economy engine with only 90hp on engine. It can be modified easily and with surprising results. If going down to NA (naturally aspirated) path, with some modifications you can easily up the HP approximate 120hp on engine. If going to FI (forced induction) path, the low boost turbo systems will easily produce more HP compare to NA path.

For those older 4G13/4G15 from the Saga, Wira and Satria model, it is a standard 12 valves carburator engine. Normally people will upgrade their engine either to a EFI (electronic fuel injection) or to a performance carburetor, to name one WEBER). However, not all mods are for power though, there are many area's of braking and suspension that any stock car can always be improved with. Along with other drive line upgrades, you can have a smooth reliable car, with improved handling, and provide that little bit of sporty power to keep most people satisfied.

So I would like to compile a list of modification that can be done for 4G13 and 4G15. This section is to be used as a guide in your modification - I will be breaking this into sections to provide a well balanced vehicle.

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Mild Modification
The mild modifications are designed for the every day driver, wanting improvements across the board without sacrificing road comfort, fuel economy or driveability.

1. Quick Shifters
The Mitsubishi gear shifter system is one of the better ones on the market. But that does not mean that people do not want to improve them. This is one of those modifications that can be done at any time. For those performing any level of competition work, or just want something a little more extreme, the Rally Spec Unit reduces overall movement by as much as 65% over stock.


2. Air Filters and Cold Air Intake Kits
The factory air box system on these vehicles, is quite restrictive.
1. Fitment of an aftermarket replacement air filter. You can get it from K&N which this will improved air flow and throttle response
2. Fitment of a Cold Air Intake Kit.

The Cold air kit relocates to the front bumper, pulling cold air especially where utilized with a aftermarket front bumper. Any aftermarket open pod filter is fine. The plastic pipe kit we honestly recommend, other than being the cheapest, is one of the best bang for dollar modifications you can do.



3. Exhaust System Upgrade
Since you have done a good job for the intake system, now is the time to do something about the exhaust system.Upgrading the exhaust system is one of the most beneficial modification and gain the most HP compare to others. In short, it worth the money to change the exhaust system. For stock 4G13 and 4G15 exhaust system, the size of the exhaust is about 1.5 inches to 1.6 inches. However, before you start to change the exhaust system, you must make a decision on until which level you plan to mod your car. Mild, medium or extreme modification has totally different exhaust size modification. Why I advised you to make the decision before moding the car because  you can save up some money for this modification. To be honest, I wasted a lot of money for my satria's exhaust system. This is because I changed the exhaust for 1.3L engine then change again for MIVEC engine and then change again for my current 4G93T  now. So you can imagine how much I had wasted for only the exhaust system. For moding the exhaust system, I suggested few guidelines as following:-

1. Naturally Aspirated - Carb / Stock ECU- You are only after mild improvements to make the car sportier, but don't intend to do any real serious mods. This being the case stick with replacement of the stock exhaust with either a rear muffler upgrade only 1.7" flow oval shaped unit, or complete it with a 1.7" press bent exhaust system with new muffler and resonator. Cat converter should remain stock. Any larger on the system would not provide without sufficient more expensive mods, any real gains.
2. Naturally Aspirated - Piggy Back ECU - you are after mild to medium improvements to make the car sportier, with slightly more than average vehicle modifications. This being the case, we recommend a 2" diameter replacement exhaust with a new resonator and muffler. No need to go mandrel bent unless you have money to throw away. This setup will handle the majority of modifications we have listed short of turbo systems
3. Naturally Aspirated -Standalone ECU - okay you are an extreme modder. Twin throttle bodies, camshafts the list goes on. We recommend in this case either a 2.2" mandrel bent system
4. Turbo Charged - 2.5" is more than enough for a 4G13 or 4G15 stock bolt on turbo.


4. Suspension Upgrade - Level 1

Basically at this point you are still have a midly modified vehicle and want to just improve the looks slightly and handling. I recommend in this situation the following

1. Replacement of stock springs with some lowering units - either 30mm or 50mm lowered units depending upon how low you want to go.
2. Fitment of a sway bar. Reduces body roll without reducing drive ability.
3. Fitment of a strut brace. Reduces the tendancy of the vehicle to float on the road and makes it less sensitive to changes in road camber, resulting in less need to constantly adjust the steering wheel to keep the car driving straight.

This package will proved a well balanced vehicle, capable of handling corners at higher speeds, will feel safer at higher speeds especially above 100km/hr. The steering will feel more precise and you will have overall more confidence in pushing the vehicle harder.

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Medium Modification
The medium modifications are designed for those who want more HP from their car.

1. Extractor Upgrade
Original extractors are always not equal. But in reality, any half decent designed unit will be an improvement over the stock manifold on the vehicle. There are two types of designs. One is the 4-1 design which is design to produce power at the high rpm. This setup is suitable for those who always want to rev high. The other design is the 4-2-1 which is design to produce power at the low rpm, better torque response. This setup is suitable for those daily drive machine. 

If your plan is to go turbo, then save your money and jump ahead several more levels. This is not for you. For everyone else, this will complete the balance of your exhaust system modifications.


2. Fuel Pressure Upgrades
This is the one thing we believe that these vehicles should always have fitted regardless of how little, or much you modify the vehicle. Quite simply the factory vehicle has been tuned for maximum Economy. This has resulted in a fairly large flat spot off idle when accelerating hard from a standing start of from a cruise mode situation. The reason for this is Mitsubishi has tuned very lean on the accelerator pump settings, resulting in the lack lustre performance on throttle, but excellent fuel economy.

1. Fitment of the Fuel Pressure Regulator kit eliminates this flat spot, whilst only marginally reducing your fuel economy. Without going into huge detail, trust us when we say, flat spots are eliminated, your car will actually accelerate properly without hesitating and your fear of being run over at stop signs will diminish rapidly. This is an easy bolt on kit and can usually be done in around 1 hour maximum.

2. There are company manufacturing bored out fuel rail, which increases the fuel capacity within the fuel rail. This enables upon acceleration, a greater volume of fuel to become available before leaning out. This also reduces the tendancy to pulse the fuel and create disturbances in the fuel flow, providing a smoother transition to power.


3. Single Throttle Body Upgrade / Thermo Block Kit
Time to look at improving throttle response again. Now if you are wanting to go a little more extreme, to a twin system then you need to wait a little longer. For everyone else, time to start looking at improving throttle response, even if you are going turbo.

The stock throttle body on the 4G15 SOHC engine is 46mm. I Recomends for the majority of owners to do the following

1. For all 1.5 SOHC owners, upgrading the stock to 51mm or a 55mm is very beneficial. However on the SOHC models, anything with the stock manifold and cylinder head over 55mm is really just not effective
2. For all 1.6 SOHC owners, upgrading to 55mm is extremely beneficial.
3. For 1.6 SOHC owners with upcoming computer mods (Piggy back ECU) then a 60mm is also very beneficial if you are remaning Naturally Aspirated and don't plan on going to a twin system. If you are going to a turbo, then stay with the 55mm.

Whilst this work is being done, I recomend fitting at the same time a Thermo Block Kit. Consider this an extension of the cold air intake kit be reducing heat soak into the intake manifold from the engine and the throttle body which have hot water running through them. This drops the average intake tempatures by 25% overall resulting in improved combustion, fuel economy and throttle response.

This package adds 3-5hp, but does improve throttle response and low rpm driveability. The thermoblock kit reduces heat soak and this allows the engine to maintain maximun ignition timing with max throttle response.


4. Drive Line Upgrades
There are three main driveline upgrades which can be done, which go a long way towards improving the reliability of the engine as well as driveability.

1. Lightweight Crankpulley - this unit reduces both the moving mass of the front harmonic balancer, as well as being physically smaller by around 25% diameter over the stock unit. Helps to make the car rev faster, spins up faster and higher. The reduction in drive ratio's means that the power steering and alternator are turning less at higher speeds further reducing engine load. This is just small enough to reduce load without reducing the effectiveness of the operation of the alternator and power steering units. Highly recommended and very easily fitted.
2. Clutch Kit - At some point your clutch will need upgrading. Two options available - for naturally aspirated drivers a standard coverplate with a semi ceramic five pucker clutch disc package. This will increase clutch efficiency by 50% without any extra pedal effort required. For turbocharged vehicles, this is upgraded to a Heavy Duty unit with the cover plate strengthens by an additional 25%. This provides slightly increased pedal effort and more tendancy to be shudder on take off's but will handle the higher torque characteristics of a turbo.
3. Lightweight Flywheel - this has two benefits being increased strength over stock units and also make the semi ceramic clutch units more driveable by not allowing them to shudder as much. Second benefit is that they are lighter and enable the engine to rev easier, faster with less reciprocating weight. However, do not skim the flywheel to much because this will cause loss of torque.


5. Suspension Modifications - Level 2
Is time to have some upgrade for your suspension again. Since mild mod is only changing to a lowered spring, it is advisable to change the shock absorber as well for a medium modification.

1. Fitment of KYB Excel-G replacement units for the more budget conscious. Retains improved handling over stock.
2. Fitment of KYB AGX units. These are externally adjustable and are perfect for the all round street / strip / circuit car. You can set them soft when your on the road, hard when your driving hard. Adjustment takes less than 1 minute
3. Fitment if Koni Sports Inserts. These are similar to the KYB AGX units, but are serviceable and provide that little bit more control. They are a more precise unit, externally adjustable on the front only, internally adjustable on the rear. For the more sports conscious person these could be the better choice.

6. Brake Upgrades
Since the performance of the car is higher now, so it is better for us to have a good braking system. The stock brakes on the front is a 235mm single piston caliper package with drum rear brakes. There are few ways to improve the braking system.

1. For those already satisfied with the current HP gain, minor improving on front brake is fine by just changing the front brake pad to a performance brake pad and changing the rubber hose to those stainless steel brake hose. I personally recommend Pro-RS because it is cheap and reliable.
2. Next, you can replace the rear drum to rear disc. For Wira and Satria owner who wish to maintain PCD 100, you can always opt for Wira 1.6 rear disc brake, Putra, Satria GTi or Mirage Cyborg rear disc brake. While owners who wish to change to PCD 114.3, you can try to change to Lancer or Lancer Evolution brake system.
3. For those wanting the final level of brakes, fitment of a 276mm Twin Piston front brake and brake master cylinder upgrade is the final step.

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Extreme Modification

Now we are down to the serious modifiers. Comfort and driveability is usually second to engine performance and speed is your goal. These next levels are not only expensive and it require an experience mechanic to perform the modification. If anything goes wrong, you are not only wasting your money but also your time. Besides that, do think of whether after this final stage upgrade will the performance satisfy you? If not it is better to save up the money and go for engine transplant.

The following mods require you to decide, which of the following ways you are going which will be

1. Suspension Modifications - Level 3
 The last stage of suspension modification is changing to either coil over adjustable suspension or just adjustable suspension. There are few guidelines as below:

1. I recommend the Tien units. To put it quite simply, many Japanese units are set very very hard, so even on there softest unit the car is very harsh, hurts kidney's and actually has worse handling as it skips all over the road. The hardest setting on the Tien units, are equal to the softest setting on the Japanese normal imported units. I cannot recommend these enough - they are simply fantastic with the ability to set your road height, rebound levels etc.
2. These Tien Units are also available to be electronically adjusted on there rebound rates via up to one independent controller per corner, or one controller on all four units as an example. Mostly for extreme racing only.

2. Performance Camshaft 4G13 and 4G15
When selecting a performance camshaft, consider the use for which the vehicle will be required. We all know the claims: 20 BHP extra. Be conservative! Don’t over-cam your engine. Choose your cam for the correct application. Consider! Fit a milder cam and increase your power by 10 BHP at 3500 rpm. Remember! You get this 10 HP every time you accelerate through 3500 rpm. Multiply this by 10 HP each time you drive through 3500 rpm then deduct the times you reach 7500 rpm. I’m sure you will find more horsepower on the 3500 rpm side than the 7500 rpm calculation.

From what I observed recently, there is a cam produced by a local brand JASMA able to deliver 8hp on wheel for a totally stock 4G13 engine. 

The specification is :
Intake 270deg lift 9.35mm
Exhaust 275deg lift 9.20mm

Well, I am not saying something without any proof. Here is the dyno graph for before and after JASMA high cam installed (from squiparts.com).  By in mind that the dyno graph below is a totally stock 4G13 carburetor. Without any modification for the exhaust system and etc. The best part is this cam shaft only cost you about RM400++ which is worth to invest for a good performance.



3. Computer Modifications
Sorry to carburetor owner, this modification is only available for those EFI owner. There are two types of choices, either standalone or piggy back.

1. If you are still budget conscious, then stick with the piggy back. However do remember that EFI piggyback with Siemens VDO ECU is not work because Siemens VDO ECU do have the ability of reset the setting after sometimes.
2. Since budget is not the concern here then a standalone is what you need. Much more advanced tuning, with options like shift lights, in built boost controllers, many many more mapping points, much finer tuning. Additionally the stock ECU even with a piggy back is unable to cope with any camshaft changes at all.

For piggy back system, I recommend Greddy Emanage. If you have a tight budget, take the Greddy Emanage blue with ignition harness. If you have more budget, you may get the Greddy Emanage Ultimate which provide more tuning capability. I do not really recommend UNICHIP because you need to bring to their authorized dealer to tune your car. This is quite inconvenience for those who stay far apart from those authorized dealers.

For standalone system, I persoanlly recommend Apexi Power FC. This is because it has the commander for you to fine tune your car compare to the rest like Haltech/Microtech which need a special software from the tuner to tune it. However the downside of Apexi Power FC is, it is not universal, which means that it is built for particular car model. You may read my ECU upgrade for my Celica (Apexi Power FC) here. Haltech EMS systems - There is the E6X for those wanting something simple, or the Haltech E8 for those wanting the best. With the inbuilt boost controllers, and hosts of other functions, these are way ahead of trying do piece together a piggy back with separate boost controllers, shift lights, gauges etc.

4. Intake Manifold Upgrade / Twin Throttle Body / 4 Throttle Body Conversion
If you are remaining Naturally Aspirated you have several options.

1. First you can go for a single throttle body with Internal Ram Tubes. Massive throttle response, Haltech piggy back system great looks without extreme levels of tuning required. Significant torque improvements and can be utilized up to a single 60mm throttle body
2. Upgrade utilizing stock manifold, modified with fitment of a second throttle body - twin throttle body conversion. Either twin 46mm or twin 51mm throttle bodies work very nicely for a progressive throttle response and great top end rush of power. This system is fantastic and highly recommended if insurance premiums are a 3. The third option is a combination of a Performance Intake Manifold and twin throttle body. Massive plenum chamber, improved air flow, progressive throttle response, this is nearly equivalent to a quad throttle body kit without the side effects and all of the benefits. Massive air flow and the ability to tune with a piggy back or EMS system. Not turbo compatible of course.

5. 1.6 SOHC Stroker Kit Package
Some people not believe their stock engine can be 1.6 liters. These engine can fit 4G18 Stroker kit which is 1.6 liters in capacity. Stock 1.5 block will be rebore n some modification on the stroker needed. Beside 4G18 from Proton Waja 1.6L, another option is the S4PH from the 1.6 Campro engine. The S4PH is lighter which I believe the engine is easier to rev. Furthermore, SP4H has a longer stroke which capable to bore and stroke it more than 1.6L but the durability and reliable is a doubt here since I personally have not see a 4G15 bore more than 1.6L. Comparing the CC that able to get from 4G15 after the stroker kit are 4G18 -> 1584cc and S4PH -> 1597cc.


6. Turbocharger Conversion Package
What more can I say other than your a horsepower and boost Junkie. Welcome to the rest of the world. This combines extreme levels of torque and power, with neck snapping acceleration. It comes at a cost though, increased fuel economy, higher insurance and lots of money. But lets get something clear first.

1. Anyone believing they can effectivly fit a turbo kit on there car safely, properly and legally.
2. These engines in stock form will not handle above 1 PSI boost without aftermarket computer management despite what people believe. 25 : 1 rising rate fuel pressure regulators, larger injectors, moving the distributor to retard timing all these tricks - none work. Don't skimp.
3. 5th Injector systems are something that came and died in the 80's. Quite simply this does not distribute fuel properly to all cylinders, and still does not provide ignition timing adjustment.
4. For boost levels up to 10 psi can be done safety on the stock head gasket dependent upon tuning and intercooler efficiency.
5. For boost levels up to 14 psi requires an upgraded decompression head gasket.
6. Do not boost above 14 psi on the stock piston / conrod setup otherwise you will learn what a banana conrod looks like.

The 4G15 SOHC engine at around 12 psi is good for around 130kw at the flywheel at the extreme.


Finally, it reached the end of this post. My advice for those who still do not satisfy the power gain from all these modifications, you should instead either look for another car or look to do a engine swap to a larger mitsubishi engine.

If you have any other modifications wish to share with me, do email me at ben9166@gmail.com or drop me a comment. Thanks for the support.

401 comments :

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Nice article mate, do you mind i ask you some question?
btw my question is what if i mod the exhaust to 1.7" flow oval shaped unit, or complete it with a 1.7" press bent exhaust system with new muffler and resonator, would it be noisy?
what if i just want to improve the pick up? what do you suggest and i got some budget, if can i would prefer to spend less.

Thanks pal.
For noise reduction, s-flow will produce less noise compare to those N1 type muffler.
I assume that you are driving a manual, so for pickup you need to change the extractor aka exhaust header to 4-2-1 design. My suggest is get a tuned length 4-2-1 header with a 1.7" piping and end with a s-flow muffler since noise is a concern to you. :)

4G15 with S4PH stroker?? Are you for real??

yes, you need to use the S4PH conrods (S4PH bearings), S4PH pistons, and S4PH crankshaft with 4G15 crank bearings. Finally you need to rebore the block to fit these in.

Bro, love your posts. Is there any workshop that you can recommend to work on these mods?

Im thinking of getting the stuffs myself so to lower the costs =D

Would the Jasma camshaft be much different from those branded ones? Cz the pricing on Jasma is really attractive!

Also bro, the quick shifter. Its not the same as the short shifter in the market that costs about RM150 right?

AM wondering if there are any cheaper quick shifter around cz the one you recommended is quite pricey~ RM550++

Thanks again!

Hi Ken,

May I know where you located? So that I can recommend you the best workshop. Yes, definitely there is different compare to Jasma with those branded company (TOMEI,TODA). However Jasma does provide a 8whp increase of performance and so far still no complaint from users.

Not much for a cheaper version of quick shifter compare to an expensive one. Both working concepts are almost similar.

Hey Ben great to hear from you!

I'm from Sunway/Subang area.

Wouldnt mind travelling a little bit though. Well, I just sent you an email. Can you take a look at that?

Thanks alot buddy!

Hi Ken,

Millennium motorsport is not bad for upgrades.
By the way, I did reply you a mail. Try to have a look and do not hesitate to contact me if there is something not clear to you

Regards

bro, post some modification for Persona. :P

Not much modification about campro yet leh.

hi Ben...an interesting article you got here...good job...
I'm wondering what other intake manifold that can be used on 4G15 to allow more air into the engine?
Thanks...

Hi,

You may opt the intake manifold from RPW or from Powerzone. Cheaper way, you may try to customize it.

yes ben,i have a 4g13 mitsubish lacer.does the overhaul gasket kit for 4g15 be used on g13?which other vihicle uses 4g13 apart from mitsubish?

hi ben..i want to change my stock throttle body to a bigger one.can u recommend what brand to change to or should i rebore my stock throttle body?

yes, can be used on g13. Proton has several models that using 4g13 as well.

regarding the throttle body, you may opt for the 4G92p 54mm throttle body. If for branded stuff, Super 90 might suit u

hello ben...i just changed to adjustable fuel reg.
but still using the old adaptor.do i need to change to aftermarket adaptor since the meter do not show any reading from the pressure..tq

Hi,

It is recommended to install the adapter as most aftermarket adjustable fuel pressure regulators will not connect to the stock fuel rail

hello

thanks alot

i have a very importnat question.

i have 2005 lancer with 4g13 engine, i have replaced it by 4g15, but i have installed my old injection because of some diffierant connections, can my old injection for the 4g13 give the enough fuel to the 4g15??
please advice
thanks
usama

Hi النعماني

4G13 running on 145cc injectors while 4G15 running on 180cc. (different batch models come with different size). As long as your 4G13 injectors do not exceed it 85% duty cycle then it is consider ok.

hye ben..

i have 1 question,im using wira se 1.5 and i intend to do some mild modification since im using it daily..how much the cost recommend for mild mod and can u give me the price list so i can compare it with others.

thank you..

can a twin cam 4g15 intake manifold wok on my 4g15 single cam engine

Hi,

Here is the price list for those price.
1. Short shift = RM120
2. Air filter (K&N)= RM200++
3. Exhaust = RM300++ (depends on the brand, the price here is brandless price)
4. Suspension (Sport spring)= RM140 (APM) RM350++ (GAB)

Hi,

4G15 twin cam run on DBW (drive by wires). So it does not fit well.

hye ben...i already install the aftermarket adaptor at the fuel rail...but my engine wont start...then i put the ori adaptor...and the engine can start....do i need to set the pressure before it works?

Yes. It is recommend to adjust the fuel pressure based on your modification.

since u say camshaft intake 270 nd exhaust 275,cdan i know how many degree need to set the camshaft (advance or retard the campulley..

hi i am using 4g13 if i wanna changes it to racein' clutch which the type and the saiz

Hi,

Normally people will set to retard 4 degree. However it can be adjusted based on your reference at what rpm band you want.

Hi,

You can try Exedy clutch. The size is 184mm for 4G13.

thx, example for voltage stabilizer does it really give extra hp?

Hi,

Not really give extra hp but it helps to maintain a constant voltage level which is good for your electronic parts in your car. For example, your audio, your headlamp brightness.

Ben, Please check your inbox .. i've been waiting for 2 weeks for ur reply regarding the MRS conversion .. waiting for ur urgent reply .. MD

Hi,

Sorry for the late reply. I already replied you via email

Hi ben, m driving a vdo 4g13.
Is there any mod that can be done to the ecu system etc Emanage?

I m thinking to change my 4g13 block to 4g15 block with 1.6 strocker, do i need to change my ecu+throttle body as well?

From,
Joseph

heyyo, great 2 see u pros... ur post has been very helpful. can u give me some advice, on wat goes best on my Siemens VDO ECU (4G15)?. thanks

Hi Joseph,

Sorry to say that Emanage is not able to work on your SVDO ECU.

As long as your ECU is able to full fill your new setting then it is not require.

Hi,

You mean piggyback ECU? If yes then sorry to say that your SVDO ECU is too "clever" to learn your driving style and reset your ECU data. Thus it is useless to install a piggyback to it. However, you may solve this by changing to MMC ECU with the entire wiring set or opt for standalone ECU.

hi Ben,

Im using MMC 4g13 now changing to 4g15 block+stroked 1.6,thinking of plug in supercharger,isit possible?& which piggyback suite the most for MMC ecu?

Hi Energyjms

Yes it is possible. For piggyback, you may choose E-manage(blue or ultimate) or Unichip.

I am overhauling my 4G13 12 valve, carburator engine. Crankshaft is also to be replaced. piston bore is 71mm and I want to put pistons of 75.5mm (of 4G15), what posible changes I have to make, please guide.

Hi Wajid,

It is not recommend to bore the 4G13 block to insert 4G15 piston. If bore the metal between the block and cooling water path will become too thin and the reliability of your engine block will reduce. If you insist to bore, please make sure that your engine cooling system is in good condition to avoid over heat problem.

Thanks

Dear Ben,

I wanna start with some modifications on my Iswara a/b 1.3 lmst. should i upgrade its handling first or the engine?

Hi William,

For me I will upgrade the engine first then upgrade your handling according to your engine output.

Thanks

Dear Ben,

Thanks for the tip. But what should I start off with first? I am a technical noobie. thanks

William

Dear Ben,

What you think if waja using bigger throttle body like 62mm with exhaust already upgraded? is it beneficial?

Arg

Hi William,

You may start with the intake and exhaust system first.

Hi Arg,

Yes, it is beneficial if you upgrade to a bigger size throttle body.

hola ben,

i used 4g15 8valve but i've changed my head,carburator n piston to 4g15 12valve...what is the next step for me to increase my engine power??
n may i install turbo kit to the carburator operating system?

Hi,

It depends on which path you wish to go (NA or FI). Changing to high cam will benefit you either you want NA or Turbo.

Yes, you may install turbo kit to your carb engine BUT having it to fine tune is a big mission for you.

hola ben,

i'd like to stay on NA...what cam will benefit the most?n other than that,what else can i do to increase the engine hp?
n is it ok if i use waja's throttle body or there r other throttle bodies that will suit most n increase the perfomance

Hi Ben,

For intake, I read that you recommend K&N Open Pod filters. Do you know of anybody selling it in Kajang? Or should I go to Eneos to get them?

Hi Ben..
i'm currently using 4g13 wira carb. do u think there is any difference if i change to EFI?

Alan

Hi,

You may opt for Mat Speed high cam or the JASMA high cam. Which the price of JASMA cam is pretty affordable. Besides that, you can change your carburetor to a bigger one.

No! Waja is running EFi system while yours are carbie. So both do not suit each other.

Hi William,

Sorry that I am not sure where to get it in Klang. Maybe you can contact kaitospeed to ship the air filter over to you.

Hi Alan,

Yes, the most noticeable is the fuel consumption.

Dear Ben,
Im driving saga lmst yr 2008 4G13.
Im a total noob in car modification and technical stuffs.
But these are the modification i've made:
1)4-2-1 extractor(wai heng)
2)S Flow muffler(wai heng)
3)GAB lowered sports spring
4)UR rear anti roll bar
5)UR Fender bar
6)Sustec front 3 point strut bar
7)Carbon Fiber shell air filter
8)HKS grounding kit
9)15 inch grams replica(taiwan made)

My Fuel consumption is quite high. 9.5km/liter
My top speed so far is 170kmh.
My pick up is quite sluggish during daylight but better during night drive.
Is there anymore performance modification can be done for my 4G13?
How can i gain more pick up or top speed?
Is there any ways to have better FC?
Is it good if i change my muffler to Apexi S flow muffler?
Any guide on my problem?
Thanks

Ryan.

thx ben.
oh btw, if say i want to turbo my 4g13, what do u recommend me to do onto the engine so that it'll last longer and can handle the extra power?
Alan

Hi, ben...
my iswara 4G13 carb. enjine wants to rebore and insert 4G18 Waja Crankshaft, conrod and piston is it possible???
or need to buy one 4G15 block???

Thanks.
momo

Hi Ryan,

My Fuel consumption is quite high. 9.5km/liter
- Try to clean your carbie and re-tune it. It may help

My pick up is quite sluggish during daylight but better during night drive.
- Are you using open pod filter for your carbie? Most probably during day, your engine suck in hot air and cause sluggish.

Is there anymore performance modification can be done for my 4G13?
- Yes. High cam. Lighter flywheel. Just to name some.

How can i gain more pick up or top speed?
- First of all, which you prefer most? As top speed and pick up can really co-exist.

Is there any ways to have better FC?
- Try to tune your carbie and monitor the result.

Is it good if i change my muffler to Apexi S flow muffler?
- In term of noise, yes.

Ben

Hi Alan,

Strengthen your engine internal parts. For eg: change the conrod, piston, valve, valve spring.

Ben

Hi Momo,

Yes, 4G13 can bore to fit in 4G18 internal parts. However the reliability of the engine will reduce. It is recommend to bore a 4G15 block.

Ben

Dear Ben,

Thanks for the advice, i had sent u an mail, please do check. Hope to have a more detailed explanation for im a total noob in car stuff yet i love automobile so much.

ryan.

Dear Ben,
thanks for the advise...
if using Daihatsu Hijet hi compression Piston 76mm on 4G15 block can works???
or fully 4G18 waja crankshaft, piston, conrod?
which 1 more reliability???

Thanks and best regards.

momo.

thx for the info, btw how high the boost can the engine withstand after those internal strengthens?
Alan

Hi Ryan,

I will reply you in a short while.

Hi Momo,

Sorry to say that I have no experience on this Daihatsu Hijet piston. So I can't give you much information on this.
It is recommended to use 4G18 to get a 1.6L displacement or the S4PH.

Ben

Hi Alan,

4G13 block is not meant for boosting. Even you change all the internal parts, those will just help you withstand from 0.5-0.8 only for reliability purpose.

Ben

Hi ben, my name is Jose, I'm from Panama, I have a 2007 lancer 4g13 1300cc. I want to change the factory header, what should I buy?

There are headers models for Mirage 97-02, Lancer ES 2.0L and Lancer Ralliart 2.4L

Mi Stock Header inlet size is 1.65 inches aprox, the headers that are in the market are 1.75 to 2.25 inches.

I'm confused, can you help me?

Hi Jose,

1.75 inches fit your car nicely. Don't go to bigger size header as your engine will lost pressure.

Ben

owh. okok. how bout WEBER? is it worth it?
Alan

Hi Ben,

Thanks for your answer.

Inlet Size 1.75, Outlet Size 2.00 inches its ok?

Jose.

hi Ben,

i own a satria 4g13 vdo, and i want to install hi-cam 272 degree in it, but as u know, my satria vdo cannot tune idling and once open aircond will cause engine to die...
if using hi-cam 270 degree izit big different compare to 272 degree or no power will gain on my car?
thx

jordan

hi Ben,

what is the ideal degree cam to put for my car so i can gain more low end torque?
thx

jordan

Hi Alan,

If your car is running on carb. Yes it is worth it but provided you get a skillful mechanic to tune the WEBER carb for you

Ben

Hi Jose,

This is correct size for your car.

Ben

Hi Jordan,

There is slightly power different compare 272 with 270.

The best is to use 264 and this help you low and mid range power.

Ben

hye ben,

first of all u wrote a good article anout 4g13 n 4g15.
where can i get the short shifter, can you name a workshop that sell that thing, prefer area KL and some sort of place in selangor eg shah alam.

TQ
fifi

*it a quick shifter sorry for the mistake..

Hi,

You can get it from Kakimotor. There have several branches which located at Sunway, Cheras and Shah Alam.

Ben

hi ben,

I wanna ask something, my proton wira using 4G15 VDO engine.. as i heard from my friends that VDO is to clever to be tune.. so if i want to change my cam into hicam, am i have to change the ecu? or nothing will effect on it?? by the way, sometimes my check engine lamps is blinking.. when i check on the air flow sensor, it is still stick on the air ram pipe as usual.. usually it happens after i drive it fast. then the engine like "couging" a second, then it will be okay back.. what is happening actually..

*sorry, by the way, usually the check engine lamp is blinking bcoz of the air flow sensor*

Hi, I'm using a wira carb 4g13, and i would like to have a really good throttle response, the 4 throttle body you stated above is for injections one?
I wish to have the response and not sacrificing the FC.

Also, the air filter will cover the trumpets when used?

Hi,

If you want the cheap way, you no need to change the ECU. Just get a experience mechanic to set your distributor to advance or retard your engine timing will do. Else you may opt for ECU.

It may not necessary is the air flow sensor problem. It might be other electronics problem. Anyway try to clean your air flow sensor and check whether this problem still exist or not. If yes get it to a shop that got a OBD II to check out the error code.

Hi Joel,

Yes the 4 throttle is for injection engine. To be honest it is very hard to have good FC but good response. Anyway you can try to get your carb fine tuned to meet your requirement. Normally ppl won't use any air filter when come to 4 throttles.

In that way, isn't the engine going to be dirty, i would like to look for good response also normal driving lo. Hm, meaning i need to upgrade to injection, then get ECU only to 4 throttle? wow... long way.

If you worry about engine dirty, you can always add air filter to each of the throttle. if you wish to mod to 4 throttle, that is the only way. if not you may opt for weber carb

alrights bro, got lots of fruitful info from here, thanks, :) will consider all cost before going for it.

Hi Joel,

Try to think what you want to achieve end of the day then you may focus on that path.

Ben

hi ben, have not yet bought the header because I'm not sure my engine is 4g13 (1.3) (06-07) this is similar to that? because only find headers for 4g93 (mirage) and 4g94 lancer ES (U.S.)

Hi Jose,

Your 4G13 is different from the picture show above. Yours is the newer engine which it has a different design for the header.

Ben

hi ben,

i wan to install rpm on my satria 4g13 vdo. but i heard many ppl failed to install it on their vdo engine...and i do get some information from seller and they said it is suite for all car... if can install it, can u recomend me any woksyop tat can provide good installation?
thanks

jordan

Hi Jordan,

Yes you can install RPM meter to your satria. As yours is vdo so I assume that yours should be the model after year 2000 which the car already have RPM wire at the meter socket. You can directly plug in the 1.5L wira/satria meter. It will works fine for you. This is a plug and play method. However if you wish to install a external RPM meter, then you can tap the RPM wire from either the meter socket or from the distributor. This is the second method.

Any car accessories shops can get this job done but you can simply DIY it without any problem and you can save up some bucks. If you wish to have more information on how to DIY just let me know and I will help you on this.

Ben

hello ben.

i need to kill my fren's satria 4g91.
im using 4g13p at the moment,
i've done spark plugs, cables, K&N open pod, CAI soon, what is the next step for me as im in a budget too. i dont wanna touch the engine, swapping, transplant.

thank you ben

rhen

Hi rhen,

To be honest, it is quite hard for a 4G13p to "kill" a 4G91. Anyway the next step should be a full exhaust system. This will definitely add up to your car performance. Next is to plonk in high cam and get it set properly.

Ben

if i do the full exhaust system & high cam,
1: how much will it affect my fuel consumption?
2: does branded extractors affects as well?
3: price diff between branded extractors and non-branded?
4: price for high cam.

Performance wise, which one is better? stock carb or stock EFI?
Alan.

hi Ben,
i already install my rpm meter and it work. thanks...
now i wan to ask is jasma brand adjustable cam pulley and lighten crank pulley can use safely? just ask to comfirm because i canot found other brand lighten crank pulley accept jasma...
thanks

jordan

hi ben.........m usin a proton saga 1.5 8 valve engine.........if i want 2 modify as the mild n medium modification like u said...........do i hv 2 change the engine head to 12 valve??????......

hi ben,
after installing the stroker kit, do we need to upgrade the injector?
i'm thinking of upgrading to mild cam, is upgrading the injectors still necessary?

hope anyone could share their experience..

Hi,

1: how much will it affect my fuel consumption?
If the tuning is right, the FC will not much different.

2: does branded extractors affects as well?
Yes.

3: price diff between branded extractors and non-branded?
It vary a lot. From few hundreds to thousand

4: price for high cam.
Depends on which brand you going for. 400-2k

Hi Alan,

Response = carb but EFi give you a better control on it due to easy to tune compare to carb.

Hi Jordan,

Good to hear that your rpm meter is working. Regarding durability, there is still no complaint yet regarding the adjustable cam pulley and crank pulley.

Hi,

There is no need to change to 12V as mild and medium modification do not need this to optimize the max performance from your engine.

Hi Salim,

It is advisable to change the injectors as well. If it is just a set of mild cam then your current injectors will work fine for you.

hi,
after watching the vid , i think 4g1x is still worth for mod, just my 2 cent.

http://www.youtube.com/watch?v=hNNpHMceoUY&feature=channel_video_title

hi ben.......tanks 4ur advice...........i would like 2 ask u a few questions........

1)wats the diference between 12v n 8v

2)if i change my stock carburetor to injection, wats the diference.....izit on pickup or fuel comsumption?.....

3)if i want 2 upgrade my clutch system to racing
wat type u ll sugest?.a semi racing or full racing clutch.for my stock 4g15...8 valve
watz is the diference if i change my clutch system from stock to these kinds?

NESH

Hi Salim,

You are welcome. By the way, based on the video, I believe the car/engine is already fully modded.

Hi Nesh,

1. There is a extra intake valve for the 12v. A little of performance and better response compare to 8v.

2. The main different is the FC, provided it is done nicely. Performance wise, it is not very much improvement.

3. Depends on what you want your car to be. A weekend racing track car or a daily driven car. If your car is a daily driven car, I suggest you to change to a semi clutch as this makes more sense for road use. If yours is a weekend racing car then go for a full racing clutch. If a stock 8v 4G15, the OEM clutch is more than enough to handle your engine output and transfer the power to your wheel. Normally, people changing to a racing clutch is due to the OEM clutch no longer able to handle the engine output and cause a clutch slip.

hi ben,

i would like to ask for some advice and clarification.

for a stroked and a mid cam 4g13 waht would be the most suitable injector size for daily drive?
- currently i'm using 1.8cc injector. pls advice.

Hi Salim,

4G93 injectors size is more than enough for you to stroke and a mid cam for your 4G13.

Ben

hi ben,
theres a code at the injector showing '947' & 'INP-064' . is it from the 4g93?

Hi Salim,

Based on the INP-064, I believe it is from a Mivec model.

Ben

Ben,

A friend of mine says that hi-cam is useless for carbie. is that so?
If i plonk in the hi-cam first instead of headers/extractors, will it be abnormal? any cons?


Rhen

Hi Rhen,

I am not sure why your friend giving such a comment. Anyway this is not true. You may read the "Performance Camshaft 4G13 and 4G15" in this post. And I am not saying anything without prove, you may read this "http://sagasquirt.blogspot.com/2010/04/jasma-performance-camshaft-4g13-4g15.html". A true story of a saga 4G13p carb installed with high cam and the dyno chart.

It will be better if you able to modify the header first then only you plonk in the high cam.

Ben

oh okay okay..
anyway, any idea how to check whether my car using the hi-cam now? coz i bought my car last year, and the previous owner mention about some cam thingy, i assume that maybe he plonked in hi-cam.



rhen

hi ben
I plan to change my Iswara A/B 4g13 to 4G15 engine for the race track. I understand the race track must be balance from the engine power with car handling. I try to custom anti roll bar on front with custom tubular suspentions. and i have no idea how to custom on rear suspention and anti roll bar. I want to try carb webber in my 4G15.

i)Do I have lighten the super touring flywheel if want to use on my 4g15 + racing clutch
ii)If i lightened crankshaft, can i get more rev without loss power?
iii) What kind of saiz webber and type or model abble to use on 4g15 to get optimum power.
iv) can i use a same big valve to the another small one on left in intake valve? (same like mvv head model)
v)What is iron block compare with normal block for 4g1x?
vi) If i use 4g32 8valve engine, can i use other mitsubishi gearbox to use front track engine car, how much power can get compare 4g15 engine with same modification?
azhar

Hi Rhen,

The most accurate way is to run a dyno on your car. If there is a high cam, you will notice a higher gain around mid range to top range. For a easiest way, notice your engine idling.

Ben

Hi Azhar,

Iswara is running on torsion beam which this is quite limited for track usage. However you might design your rear anti-roll based on those in the market.

i)Do I have lighten the super touring flywheel if want to use on my 4g15 + racing clutch
For better response, YES. However do not lighten too much as you will feel difficult to gain momentum when climbing up hill.

ii)If i lightened crankshaft, can i get more rev without loss power?
Yes, your engine will feel easier to rev however your engine durability will reduce as well.

iii) What kind of saiz webber and type or model abble to use on 4g15 to get optimum power.
You may get the weber DCNF 36 for your 4G15

iv) can i use a same big valve to the another small one on left in intake valve? (same like mvv head model)
No. You need to get the entire head set from MVV.

v)What is iron block compare with normal block for 4g1x?
Much Stronger. More Resistant to methanol injection. More durable if treated the same way. Can handle more power if tunes are correct, because of its rigidness. Handle higher heat temperatures.

vi) If i use 4g32 8valve engine, can i use other mitsubishi gearbox to use front track engine car, how much power can get compare 4g15 engine with same modification?
Sorry, I can't get any FF gearbox that can couple with 4G32 at the moment.

Ben

ben..
I have also seen Mitsubishi Galant SL GT 1.6 (M)with Saturn engine 4g32(rwd)twin cam 8 valve (saturn head cover) for sale, before that

i) i am not sure if 4g32 gearbox (fwd) from mitsubishi mirage 1986 can match with 4g32 saturn engine?

ii)what diffrent of gearbox (fwd) from mirage
cx si 1986 model (4g32) cyclone (above) and lancer 4g15 cyclone? i mean is it fit each other?

iii) i hope with 4g15 gearbox can be use at saturn engine and running at my iswara?

iv) i get some info that saturn engine have a good reputation at that time. do you have any idea how much power can get from saturn + dcnf weber? it is enough to smoke 4g91 even 4age or 4g93?

v) If any gearbox cannot match with saturn to run in (fwd), i'm gonna use original galant gt.

i need somes info.. tq

hey ben,
i have done some research on light weight crank pulleys and have read some negative stuf. aparently the vibrations can damage your engine. is this true?
what are the pros and cons of a LCP
cheers

also, my mechanic says a Fuel pressure regulator will be useless on my engine because i have no turbo.. im realy confused on this topic as well cheers

Hi,

There are 2 types of lightened crank pulley in the market:-
1. one of which is undersized
2. one comes with a damper

Advantage of having an undersized pulley is that the revs climb much faster. Normally it is used for race cars so they will rebuild the engine every time after race. So con rod bearing wear is not a problem as we change the bearings during each rebuild.

Advantage of having a lightened and dampened pulley is that the revs will climb slightly faster but not as fast as the undersized pulleys. With the damper in place, we will have peace of mind when it comes to the wear & tear of the con rod bearings.

Regarding the fuel pressure regulator, you don't need one unless you trying to get more power out of you injectors then there made for. Yes you can raise the pressure to get some more fuel, but it will decrease injector duty cycle which is not a good thing.

Ben

hi ben,

do you think its necesary to change to LCP?



rhen

hi ben,

Just wanna ask, how much does it cost for a half cut 4 units of 4g91 injectors?

Hi Rhen,

If you wish to have a better response then you may install the LCP but recommended to get those come with dampers.

Hi Salim,

It is around RM150-250 depends on the condition of the injectors.

what brand i can get LCP with dampers?
heard about MYTHELOGY has dampers but they dont produce for 4g13 anymore?


rhen

Hi rhen,

I believe there is LCP from Mythelogy for 4G13. You may get it here.
http://forum.lowyat.net/topic/1822326


Aside to Salim,

No problem.

Hi Ben. Great job you are doing here!

I have a Wira 1.5s. I've added
1) a drop in K&N filter
2) Everco 4-2-1
3) Kakimotor lightened pulley

I feel my Wira is very sluggish especially at low RPMS
I'm sticking to NA, looking for pick up, not so interested in top speed.
a) Will a fuel regulator really help?
b) How much worse will my fuel consumption be?
c) Will a 55mm throttle body help?
d) How much RM will (a) & (c) cost?
e) Is Powerzone's cam worth it?
f) Since I have Everco 4-2-1, will changing to Powerzonr 4-2-1 be an improvement?

Hope you can help.
Best regards
V

hey ben,

just asked powerzone bout their header material, said, mild steel anti rust with hard chrome coated. mendrel bend. is mild steel reliable? im just worrying bout rusting. or is there such thing other steel that wont rust other than stainless steel? thx


rhen

Hi V,

Let me try to answer your questions.

a) Will a fuel regulator really help?
No. It just provide you to adjust the fuel pressure.

b) How much worse will my fuel consumption be?
Depends on what modification you had done to your car.

c) Will a 55mm throttle body help?
Yes. This will help.

d) How much RM will (a) & (c) cost?
For a is about RM300++(ori). No idea for c.

e) Is Powerzone's cam worth it?
Yes. But before doing any buying, try to compare the spec with other brands.

f) Since I have Everco 4-2-1, will changing to Powerzonr 4-2-1 be an improvement?
Depends on the design. If both are similar, there is not much different.

Ben

Hi rhen,

Mild steel is quite reliable with the price tag.

Ben

any chances of rusting for mild steel?


rhen

Wow! the info you shared here breath new life to my old wira 4g15. Thanks again. YOU are the man....

Morris

Hi Rhen,

Yes. It is possible changes for mild steel to get rusted.


Hi Morris,

Thanks a lot.


Ben

hey ben,


is there any price and workmanship diff if

1. i buy the header at powerzone and make the full exhaust system there.
2. i buy the header at powerzone and get the piping fix at other exhaust shop.

hi ben
if i bore to fit 76mm piston as you suggested,
what is the difference between 4g15 and 4g13 block wall? "wall thickness"
Why 4g15 recommended?
tq

hi,my car is 1.3 vdo.i would like to change the throttle body to bigger one.what kind of TB i can fit?

Hi,

Yes. Price vary from shop to shop.
So my advice is better you quote the price from different shops.

Ben

Hi gldesign,

For 4G15 block, you just need to bore extra 0.05mm compare to 4G13 where you need to bore 5mm. The concern is if you bore it too much the block will become too "thin" where reliable issue will occur.

Ben

Hi,

You can try the 1.6L TB to fit to your car or you may get the perdana TB as well.

Ben

ben,

i am still confused which header to buy. powerzone mild steel or hotbits stainless steel.. which is better/durable? or can u explain more? =)
thx alot ben!


rhen

Hi rhen,

Try to get the one which provide you the higher hp\torque gain. Then wrap it with the exhaust header wrap. This will lower under hood temperatures preventing heat soak which improves performance and increases horsepower.

Ben

ben,

do you think its worth it to get hotbits mid & rear section? as it is expensive @.@

rhen

Hi rhen,

No. I wouldnt suggest you to do so. The piping itself will cost you a bomb. For the muffler, you may always opt for a used but good in condition. Maybe from HKS,Tanabe or RSR.

Ben

oh alright, guess i have decision now. will report the result after i install it ;)

thx ben.

rhen

Hmmm ... Modifying cars are really trending. Its for the purpose of greater engine performance. Thanks for the article, its cool.

if i plug in the perdana TB would it start as usual due to sensors n etc?

Thanks

hi...
just want to ask...im using satria 1.3 2003..how i can know my engine is 8v/12v??
-jay-

Hi rhen,

Hope that you already successfully change your exhaust system and improve the performance.

Ben

Hi,

If you change to perdana TB, you will need a bit of fine tune to suit your car.

Ben

Hi Jay,

Proton only produce 8v engine for the first generation Proton Saga. The rest of the 1.3L engine are using 12v.

Ben

hello ben.i've pluged in the perdana TB but it doesnt work.maybe 1.6 would be okay? mine is 1.3 vdo btm all 1.5

sorry,but any1 who u know that can tune the perdana TB?

hey ben~

thx for ur guides all this while. now
i've installed powerzone header with 1.75" piping together. the result is just great. rev climbs up easily, smooth low end torque. installed "pro" billet cam as well. powerband is at the entire rpm. fuel consumption slightly improved. next mod: flywheel skimming ;)

now, i have question for muffler. how to know those branded halfcut mufflers are original? i saw some mufflers im interested in mudah.my, but is mudah reliable?


rhen

and i manage to catch up my fren's 4G92p satria. x)

rhen

muffler inlet. does it have to be same size as my piping if i change it? pros and cons if i use bigger or smaller inlet?



rhen

Hi,

Oh sorry I never know your is 1.3L vdo. I believe you need to mod to fit it as what I know 1.3L sensor is at the throttle there.

Ben

Hi rhen,

Nice to hear that you done your modification nicely. Regarding the flywheel skimming, my advise is not to skim it too much if not you will lose your momentum when driving up hill. Basically those branded muffler from halfcut shop will come with a JASMA tag. But you need to look at the real thing to ensure the originality.

Great that you manage to catch up with your friend 4G92. So how is your friend reaction? "Damn, he is running on a 4G13 but still manage to catch up on me?" lol...

Inlet size doesn't really matter. But of cause you don get those 3"-4" inlet which meant for turbo engine. Try to get those 2" inlet and outlet 3" to avoid from JPJ/Police attention. Beware that, Japanese measurement of the inlet size is the inner size while over here is outer size. So for you to get a 2" inlet Japan muffler, you may getting the outer size about 2.2". While in M'sia, outer size is 2" but the inner size only somewhere 1.8"


Ben

hi Ben

now im using 1.5 vdo engine..can i change the trottle body to the bigger one?? because..what i know is..vdo model have socket for TB..but the other TB dont have that socket..so..can it work??

my 2nd question is..now im using pisten and crankshaft from waja 1.6..so..can i upgrade by using pisten and crankshaft from waja 1.8??

Izzo

hey ben,

does 2.0" muffler inlet suitable for my car?
my piping size is 1.75" now.


rhen

Hi Ben, is one of my luckiest day of my life to found your blog, this is really helpful for me and many ppl out there, great job. =)

Recently i worked at japan about 10years, i've bought this wira 4g13p vdo for daily use, from the start, i've tried to change the engine, but it was disaster for car tuner in malaysia cuz there's a rules 1.3cc chasis maximum engine is 1.5cc, so i rather don't do it, since 4g15 different is just the block.

I've tried to started with other way that most of the japanese did for N/A engines, it said to be easiet way to setup the car's torque especially for 4g13 that lack of torque. But it's different here in malaysia, we can't get any production car's aftermarket new ecu here.
That makes me hate VDO so much, it's an anti tuning ecu. And the production VDO set the torque so bad like driving a (VeryDamnOld) car.

Local friend told me to change the exhaust manifold to 4-1 for better torque and uphill, as i know 4-1 is not a fuel efficient tune for daily drive car, and lack of reponse at high speed.

I'm so confuse to tune this car, i would like to hear your suggestion on which part i should start with.

Appreciate for reading, thank you.

Hi Izzo

Yes, but you need to modify to fit the socket/sensor to it.

You can't fit in the 1.8L waja stuffs as the bore is too big to fit into 4G15 block.


Ben

Hi rhen,

Yup, it suit to your setup. No worry.

Ben

Hi Desmond,

First of all thanks a lot for dropping by at my blog.

Just to clarify that for the conversion rule, 1.3L can still upgrade to 1.6L where it is 25% increment from 1.3L. For 1.5L engine, you still can opt for 4G91 (not necessary 4G15 only) and 1.6L from a 4G61/61T or 4G92/92P/MIVEC.

Regarding the drawback of VDO ECU, you can always get the MMC wiring set so that it will give you better response and of cause for your future ECU upgrade.

As I understand that 4-1 is more to higher rev compare to 4-2-1 which provide better pickup. Anyway, I might be wrong but you may try out on those cars who own these 2 setups.

If you still wish to stay in NA path, try to fix the intake and exhaust which this will provide you better response.


Ben

hey ben,

do you make any guide for cam adjusting?
coz, i would like to adjust it myself nextime instead of sending to the workshop which minimal fees applies.. =D

rhen

Hi rhen,

Ya, I do that but I need sometime to take photos for this guide. Please stay with me.

Ben

Thanks alot Ben, previously made some minor tuned since the clutch plate getting bold, so i've modified super touring 1.6 flywheel without skim.
But still running with VDO with bosch super sport cable.

Gonna share something funny with this super touring flywheel on a 4g13 here..

Original super touring bigger flywheel and it's heavier with 10kg, at the first and second gear is great, when third gear with a 4g13 can pull a long long way..

When using orginal flywheel result is:
1st gear: 40km/h @ 6000rpm
2nd gear: 68km/h @ 6000rpm
3rd gear: 120km/h forgot rpm..

Super touring 1.6 flywheel result is:
1st gear : 63km/h @ 6500-7000rpm
2nd gear : 97km/h @ 6500-7000rpm
3rd gear : don't really felt the rev but reaching 0-100km/h in 11sec with aircond off.

It's kinda fun at 1st and 2nd gear for st 1.6 flywheel, but need some mod next for better rev at 3rd gear and further.

Will stay with you and follow your step, for exhaust manifold i will try to visit Wei Yip for 4-2-1 and center box first.

Hi rhen,

Let me finish up my europe trip post and I will start to write up some technical post again.

Hi Desmond,

Good to hear that you change to super touring clutch. I believe the change of your speed/gearing is because of the super touring clutch set is heavier compare to 4G13p. This is due to the momentum gain for the heavier super touring clutch set. Besides that, if possible please do not visit Wei Yip as the workmanship and the quality of the product is not that good. This is based on what I have seen on my friend's car.

Anyway, good luck for you to hunt for more power.


Ben

helo ben...
i like when i see your pic...
when u tuning your 4g15 vdo siemens to turbo kit...
how much to install turbo kit at 4g13 siemens...?
n how boost can go..?

From Wan(SMC)

no problem at all ben ;)

desmond,

i would suggest u to go for hotbits/powerzone 4-2-1. these both are the big bang for the buck. u can just buy the header as for the piping, u can opt for EVERCO. it would be cheaper that way. just my few cents ;)


rhen

Hi Wan,

The cost may vary depends on which kind of performance parts you use. If you go for budget, it will cost you around RM5k and the boost is around 0.4-0.5.

Ben

Hi,

You can get the 4 throttle from 4AGE 20v and customize it. This kind of 4 throttle can obtain from any halfcut shop


Ben

Hi Ben,

I'm driving a saga iswara and wondering that if I can put in a Apexi RSM? Besides that, how to increase horsepower going up hill?

Thanks

Hi Lee,

The RSM is only applicable to EFI cars, so it won't fit into your iswara. To increase horsepower, you can install camshaft and do a ported head. Other that these, you can install a tuned length extractor kit.


Ben

hey ben, how are u lately..

what clutch brand would u recon for 4G13? (hopefully not too hard) i've seen WORKS/EXEDY.. can i use back the stock flywheel? what size is the stock flywheel?

rhen

hey mate ive got a 4g15p in my satria and ive been collecting parts to turbo it at the end of the year. problem im having is getting a manifold. do i just make a basic log type, cut the standard manifold and weld a turbo flange on it or get a cast turbo manifold off ebay? also would the v6 magna injectors be ok for about 7-8 psi or would i be better off using something like stock sr20det injectors. im doing it all in a kind of cheap budget so im trying to use as many bolt in parts as i can. one last thing would a t25 off a ca18det be to big for the little 4g15? i was thinking with a log type manifold and narrower than normal intercooler pipes it might help it spool up a fraction quicker..

cheers Rob

Hi rhen,

How are you and your car doing? Go get the Exedy clutch and it is not that hard. If you wish to have a very customize clutch set for you, do pay a visit or give a call to BRClutch. They can help you on this. If not mistaken, the size is 7.5".


Ben

Hi Rob,

I won't recommend you do the log type of exhaust manifold. It is recommended for you to get the nicely done 4G15 turbo manifold. For injectors, GSR's injectors may suit you well and for the turbo size get the TD04 will be nice. If too big you will face turbo lag.


Ben

doin fine here. retarded my cam 2 degrees. better power delivery now. i think i'll go for exedy. the 3puck (red) right? if its not that hard i get it.
anyhow, my top speed still remains the same, 165kmh max! whats the culprit behind this?

i've done;
powerzone 4-2-1, str8 flow muffler,
billet camshaft (pipercam)
lighten flywheel,
15" wheel,
K&N open pod,
CAI,
iridium plugs, arospeed plug cable,

how to increase top speed now? as i have good acceleration now.. thx ben ;)


rhen

hi ben, ive worked out where i will run the oil feed from but im a bit lost about the water feed? fuel pump i was looking at a walbro 255 and a adjustable fuel reg. intercooler ive been looking for is a stock evo one since its a fraction smaller than the usual aftermarket front mounts and having a satria gti front bumper on it i dont want to have to cut it up to much ($1200au from proton).

cheers again Rob

btw ben, i found a 4g15 block RM700 with paper, RM350 labour+gasket is the price alright for the block? coz the seller mention that price will not drop but raise. so plan to buy 4g15 block and plonk in to my car, but
what 'to-do-list' i have to do? what checkups have to do?what etc. etc. etc.

rhen

Hi Rob,

Can you send me a picture of your turbo? So that I can point out where is the water feed location. Or leave me your email address then I will send you a sample picture. There are a lot of intercooler size available. Evo is consider a medium size, if you want smaller then you may get the 450x230x65(mm). This is good enough for your project and there will not be any cutting to your bumper. By the way, $1200au for just a GTi front bumper is way too expensive. You may get it a full set over here with a way lower price.

Ben

Hi rhen,

There will be always a trade off between top speed and pickup. The story behind is always the gear ratio of your car. Anyway, your car is doing very well where factory spec of the top speed is around 170km/h. That's the limit of your gearbox and engine. If you insists of getting more top speed, you may try to change the final gear ratio and bigger cc engine.

RM700 for 4G15 is a good bargain for now. I bought a complete 4G15 with installation to my old saga was RM1.6k. To be honest, if you really want some serious power, get the injection kit with a 4G18 stroker kit as well. Although this will cost much but this will save you up for the installation fees.


Ben

ben,



i was told that i shud overhaul if the block were left too long (not fresh) but how to check. seller tell its 70xxxkm mileage, i assume he wont tell me how old tho. as for the radiator shud i change to a bigger one?

i will stroke it next time if budget allows. right now i just wanna play with 1.5L first ;D
btw, im maintaining my carburetor. so no efi for me =D


rhen

Hello Ben..

I am using 4G13 VDO wira aero and i need to setup turbo on it. What piston i should use? Please help me.

Or please PM me crucifycry@yahoo.com

Edmund.

hi ben, i know where the water line is on the turbo i just dont know where to run it from the motor?

cheers Rob

Hi rhen,

Yes, it is always a good idea to overhaul an engine before installing it to your car. However it is no way to tell the 70k++ km mileage. Seller can does any thing on the mileage meter. If this is from MMC, it might be around late 80's. Regarding the radiator, it is better for you to change it for better cooler system.


Ben

Hi Edmund,

You can try to use the 4E pistons but there is a need to bore your block to fit it.


Ben

Hi Rob,

Do you mind to send me an email. I will send you a picture of my current setting.


Ben

no worries ben, my email is myrotaryrx2@hotmail.com

cheers Rob

hye ben,

how about modification stroker for 4G13?

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