which year has best engine

Originally posted by BlackDeuceCoupe
^^What he said...

If you want to 'build' a SOHC Honda engine, the D16Z6 is THE one to use. It's the best SOHC engine Honda ever made. They can be built to over 250-HP NA...

A Z6 block with a Y8 head is best combination. Why? A Y8 head has a slightly smaller combustion chamber volume - and I mean slight. It will give you .5:1 [dot-5] more compression. Y8 blocks, on the other hand, are prone to main/rod bearing failure. Why? I don't know, but it's common knowledge. So, the hot setup is a Z6 block with a Y8 head, or just forget the Y8 head and the .5 higher compression ratio.

Then there's the OBD1 vs OBD2 situation. The advantage should be obvious to anyone except a newbie; so, no explanation necessary. Also, with a Z6 engine you don't have to deal with a crank fluctuation sensor, knock sensor, dual heated filament broadband oxygen sensors and all that happy horsesh!t.

I would guess that there are more bolt-ons and internal parts available for Z6's than any other SOHC Honda engine, but I don't feel like playing Perry Mason, so don't bother asking.

To round out the package, go with a chipped P28 ECU using the stock harness...

ok first of all 250 HP naturally aspirated with a Y8 head? WTF? I would like to see one of these make that amount of power and be drivable. I think u are living in a dream world on that. Your other problem is the Y8 head is very very restrictive. I definately agree with Azcivic here. Your higher compression ratio over the Z6 head doesnt make a difference when the Z6 head outflows it by a ton. Even a fully ported Y8 head still wont flow as much as the stock Z6 head. Definately stay with the Z6 head.