AE 101 - 111 ITB Question, please help

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Quote:check this out, the blacktop wrist pins are machined on the ends and weight less than the silvertop pins!

blacktop pin:



silvertop pin:



another thing i thought i would throw in is the difference between the 16v and 20v oil pumps. the 16v is on top:




from what ive found there where two versions of the silvertop. the early model had a different itb manifold and itake port shape. heres a pic of the old manifold:



heres the newer silvertop intake manifold:



and heres the blacktop, notice the very different shape. not as tall but much wider:



heres the measurements of the silvertop:



okay another big difference was the exhaust port size. the blacktop is just like taka said. 2mm larger than the silvertop:


silvertop:



blacktop:



okay. also another big change is the combustion chamber shape. the blacktop is very smooth with almost no place that can be called a "hot spot" or some place where detonation is likely to occur. the silvertop on the other hand has three protruding edges.

silvertop: the bottom of this chamber was also smothed out by me to try to remove the hot spot.