Charper732

Looking for solutions for an OEM like rebuild. Founds these Nippon FRM pistons. Has anyone used these? https://www.ebay.com/itm/JDM-NIPPON-...laniV7&vxp=mtr

Slowcrash_101

Walk away.

fatjoe10

I will be the guinea pig, as I'm preparing to rebuild an F22 with the 87.50mm pistons with proper FRM finish. Yes, the OEM manual states 87.25mm max overbore... no problem; I am just experimenting. I'm not afraid to fail so I will just run it and see how it holds up.

Charper732

You are boring and using the Nippon pistons?

fatjoe10

Correct, I'm over boring with the Nippon Racing pistons.

Charper732

Keep us updated. Any plans to tear it down after good bit of use to check skirt wear, or just run it til it dies?

fatjoe10

I will run it until I see either excessive oil consumption or low compression. Obviously I will be doing periodic compression checks.

Slowcrash_101

The FRM layer is .5mm thick, bold choice.

fatjoe10

I'm approaching this from an experimental perspective. I got a mule vehicle set up for this. I want to experiment so that someone may look and say "look he tried 87.50mm and it was a total failure." Sometimes we tend to be too caught up in theory and less doing. I'm not dismissing the information presented; I just simply wanna play

Charper732

That's not really saying much unless you have personal experience with failure from the coating being too thin. ...the thickest nikasil you'll ever see is .2mm...helluva lot thinner than what we are dealing with here.