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12:1 or 12.5:1 cr pistons for ea81?


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A friend of mine from Alaska told me that he heard of a company making high compression pistons for ea81 . Anyone heard of that? Also does anyone know what the cr would be on an ea81 with .040" head shave and ea71 pistons?

 

At .040" you would be looking at a custom intake as well. The waterports on the intake will not match up corrctly to the head. Not sure of the compression. I know there is an equation for it but can't remember it.

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