.020 Piston for my wolverine---Please tell me what this means

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Dec 8, 2001 | 01:32 AM

RUBICON4X4

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I'm looking for a high compression piston for my wolverine, 10.25:1.
RockyMountain sells a std size & .020.

My question is what is .020?
Is it the 10.25:1 piston I'm looking for?

Thanks for any help.

Dec 8, 2001 | 01:58 AM

OhHell

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.020 means that it is 20 thousanths of an inch oversize.
It has nothing to do with the compression ratio.
Normally standard size is used unless there is scratches in the cylinder or the cylinder is worn enough to be bored to correct the problem.