Yes, I built this motor a few years ago and made sure to have 10.5-1 pistons...just like stock. Paid the big bucks and got the forged. Runs great but I feel that the motor hasn't come close to reaching its potential.
Yeah, that's what i said TOO! Until I cc every thing and then said WHAT THE FK!
If you haven't "AKA" blue printed you motor...........which basically means you haven't shaved then 75esh cc combustion chambers down to 64........Well ......sorry man, but you only have 9.4:1 out of a 10.5 piston.
And the 11.5 pistons.......Yeah they are figured on 75 cc combustion chamber...........so your simple choice is 9.4 or 11.5
Not trying to bring you down. They run vary well at 9.4:1