LS1PUNK

iTrader: (5)

Im currently putting a FI 408 together and already the have crank and rods, but Im not sure what pistons to get to achieve 9:5:1 with 72 cc heads.
Im not sure which Brand piston either but Im looking at Diamond or Wiseco.

I already have:
Patriot 72cc heads
Callies Compstar Extreme Duty 6.125 H beam rods.
Callies Compstar 4'' crank

Any help would be really appreciated.

LS1PUNK

iTrader: (5)

Sorry, wrong section.

Mods, can u move this?

LS1MCSS

iTrader: (18)

Find a compression calculator and figure it with a piston with about a 15CC dish. I think that will put you pretty close. That's based on the piston coming above the deck approximatly .007.

cbr600rx7

iTrader: (12)

compression calculator.
http://www.rbracing-rsr.com/compstaticcalc.html