I ran one before that was 20-20 on the crank. Also i've have heard people say they have run n/a cranks before without any problems. Its all in the tune if it last or not.
I've asked a lot of racers and they say no more than .10/.10, that's the cut that's on mine, and I was told to trash it after a blown turbo and spun bearings, so i bought a new one.
The rolled fillets are at .025 under. If you go .030, you will cut away the rod journal fillets, which is the source of increased strength for the turbo cranks.
The rolled fillets are at .025 under. If you go .030, you will cut away the rod journal fillets, which is the source of increased strength for the turbo cranks.