Those pistons you have are an inboard forging. They use a 2.5" ish wrist pin instead of the 2.950" that the standards use that i've seen. The first set i'd used was from Diamond in Curtd's 383. The spec sheet said a MINIMUM of .0075" piston to wall clearance. I was thoroughly confused and call their tech department and they said the inboard forgings grow more and need the more clearence. Still in disbelief I had the machine shop set the clearence to .0075-.0080". I guess it was ok cause Curtis's engine has very little piston slap on a cold start and is still taking ~15 psi boost. I don't think it burns oil either. Maybe he'll confirm that.

 

Hmmm....I'll check with Rex on the inboard forging deal.

Cause is unknown yet, but cooling issues around #7 are suspect. Didn't wash the rings, no signs of detonation, and the #7 injector was flow tested to be about equal to the rest.

 

Julien, Rex and I are both talking in terms of longevity. From the beginning the plan was to build a motor that would last as long as possible. We're on the same page in that we don't want to take shortcuts. He doesn't think I'll have any issues at all taking this block to .040 over.

 

Ok...good deal then!
The anti-**** patrol will start in the morning!!

 

I have no oil burning / excessive use problems. The only noise i have comes from the triple disc converter...man it rattles.