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Corey, try the Speed-Pro (Federal-Mogul) catalog at an auto parts store. This would be for TRW pistons. It has the listings of comp. ratios for a given piston and different head cc's. It migt be on the web also.
The floating part of the equation comes from the small end of the rod being bushed.You can have this done to your rods if needed.But not many machine shops in the USA can machine a piston for Spirolocks that is not already so.Not cost effective anyway.
Welcome to the world of going fast costs $ How fast you wanna go?
So it seems it is Ross,JE or SRP for you.But sincerely doubt you need floaters unless you plan on changing pistons between rounds or you are building a killer hi rpm motor
Corey 68: With Speed Pro's production problems and financial mess, I highly, highly reccomend you call Jegs RFN, and order 8 2465F's. No one, I repeat, NO ONE else has any. They had 38 left when I ordered.