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piston ID help +0.508

Posted: Wed Jun 09, 2021 8:51 pm
by jcrcleeman
Could someone help me by confirming that the pistons I currently have fitted are +20thou?

It doesn't have +20 stamped on them as I would expect but instead it reads "AE 20397 +0.508 AUF"

I'm pretty sure this means +20 but would like confirmation from more knowledgeable folk that I'm not jumping to conclusions!

Re: piston ID help +0.508

Posted: Wed Jun 09, 2021 9:48 pm
by Chipper
Certainly, 0.508mm = 20 thousands of an inch, so I'd guess they are indeed +0.020".