anyoen know the compression hieghts of the 2.8 and 3.1 pistons

i dont have the info off hand and i need it

 

trying to figure out if a 2.8 crank with a 6inch rod and 3.1 piston will come close to working

a 6 inch rod 2.8 with a turbo, or high compression hyrbid would be a pretty nasty build

 

The difference in crank throw is .3", divide that by 2 and that's what you get for your pin height difference between the 3.1 and 2.8 (.150"). If you put a 6" rod on a 2.8 crank and 3.1 piston, your piston will be proud .140" out of the block (3.1 pistons are .010" in the hole, 2.8 are zero deck).

 

dammit and the 3.1 pistons cant be flycut enough, forgot about halving the crank throw distance

 

60*v6 has a CR calculator on their site fyi, useful for figuring out that kinda stuff. Also if you just run 3x00 heads on a stock 2.8 it puts you at a pretty damn high CR from what I recall when I did the calcs on it.