slamm69

iTrader: (1)

Will a higher compression piston mean that the cranking comp will be higher than a stock piston?My little 355 with trw forged 11:1 domed pistons and 64cc heads has only 185 to 190 cranking compression psi.I think I had almost that on a stock 350 that I tested years ago,but its hard to remember.I still thought with these pistons that I would have over 200psi.I know that the cam has something to do with cranking comp but I dont know how much.The cam is a solid 250/258 @.050 on a 109 lsa.
Also I was told I could degree the cam in using cranking compression,just set the cam timing where it has the highest cranking compression.Has anyone ever heard of this?

ZONES89RS

iTrader: (25)

Yea, your on track cam wise, a 109 LSA is tight, so you are bleeding off your cylinder pressure way more than a 112 grind. Your static compression will always be lower with a tight LSA. HTH