Im needing help,I have a customer whos been told he can install 3.7 pistons in either a 3.2 or 3.5,,,,,,,,,to increase compression, I own a machine shop and been doing engines for 34 years but cant find any info out there concerning this issue,,,,,,,,,,Thanks guys

 

I think the easiest way to get this information is the spec sheets from each of the respective acura's that have these pistons.

With the deck height, stroke, bore, rod length etc you should be able to figure out the compression height of the respective pistons.

This is assuming the CC/liter difference is on stroke and not bore differences. But the specs sheets will make that evident.