pugwash Posted August 7, 2006 Share Posted August 7, 2006 Just starting to get towards building my RV8 and need some pistons the engine i have is a 4.9 with a 95.2mm bore and a 86.4mm stroke. The heads I have are CC'd at 32 (i beleive) across the 8 and haven't been skimmed, neither has the block been decked (i don't beleive). Now assuming that i am going to run Comp Gaskets how do i work out the specs of the pistons so that i end up with a CR of 10.5:1? is there an easy formula? (fyi block is an early block that has had a cross bolt kit put on but still has the old journal size on it!) Whats the difference between Forged, Cast and Hypereuretic (if that's how it's spelt). Which is best for a lazy 4x4? who makes em? what information will i need to provide which i haven't got above? If i found some chevy or buick pistons at the right "spec" could i use those? finally i think i understand notching- but how does it affect the CR? Quote Link to comment Share on other sites More sharing options...
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