....How many people here have actually seen a .060" over cylinder fail in a stock type build in ANY Mopar block?....Kevin
A few years ago one of the members bored a 383 out to 0.060 over and had it sonic checked. Thrust face was right at 0.090 and he asked if he could run at that. I replied that he could, he believed me and did, ended up with a cylinder wall crack. So yes, Virginia, it does happen.
I did worse with another make. However, I was not aware of the problem when I bought the block. It was only +.030" but was a 700HP, high RPM motor. Had all the good stuff, light weight JE pistons, Al rods, roller cam etc. Previous owner never sonic checked block when they made into race motor. Thrust wall was .080", other side .300". It had core shift.
Fate caught up with it. Finally at top of 2nd gear around 7,200 it let go. Everything that moved in the motor was junk. I mean everything.
I would never do a performance motor ever again without sonic checking.
