Quote Originally Posted by golfworx View Post
Ah ok.

So your not using the Heron head then? Unless you buy some very specific heron head style pistons or have them custom made

Just remember & I think we've been through this before. You can't go to 84.5mm pistons.

3.5mm overbore from what I know can't be done! Thats a 0.137 Thou Overbore & will probably end up in the water jackets!

From what I know & can find 83mm (83.5mm is the largest for a 2L block & very rare for a 1.8L block) piston are the largest piston you can buy for a 1.8L block & even then it isn't advisable for a track engine as this also causes cooling problem under extensive high load/pressure
opps typo I meant 82mm. There just stock 2L pistons.

nah not using the Heron head. Would these engines be rare by any chance?