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Comparing 20v Silvertop with MIVEC Blacktop

20v Silvertop is the engine head (top part) from Toyota Corolla Levin E-AE101-ACMZF 4A-GE using 4 throttles and semi intelligent VVT. MIVEC Blacktop is the engine head from Mitsubishi 4G92, the first engine that equipped with MIVEC technology.

20v Silvertop's head weight 12 kg, while MIVEC Blacktop's head only weight around 7 kg. Why is Toyota's head so much heavier? Here is the answer. Notice the 4 valves per cylinder versus the 5 valves per cylinder.

On the top side, things looks much more complicated on the 20v. Must be due to the extra valves, causing further hectic valve angles etc.

Comparison of the air intake side. Looks like a boat aren't they? 4 huge stim exhaust tower like in the 50s or earlier

Comparison of the combusted exhaust side. Looks like the MIVEC head (left) has more aerodynamics as a boat/ship than the 20v.


Jason said...

Do you have any info about VTEC B series engine?

Ben said...

Hi Jason,

Sorry currently I do not have any info about Honda B series engine. Will try to source around and will post it here when I got it.