Originally Posted by
Mark V8
I'm pretty sure my old 4x4 Cosworth was 150psi on first oversize standard pistons
Cheers, thanks for that.
I did à leak down test and have under 10% leakage from each cylinder so I know now that my engine build is perfect and my rings are definatly seated ok. So my 130psi compression figure is definatly coming from my piston posckets and headgasket.
The engine is perfect at the moment (only done 350km run in ) I ll report back when I can finally put my foot down and see what it s like with réal boost (I ll probably break the gearbox 🤣
