Originally posted by Kodiak
lt1s10, I can get a pic of each piston on tonight. The first time I built it, I went with the lowest ring gap I could,( the tighter, the longer it is going to last, My thinking). The second time I went with the upper end of the scale. But the third time, I added 30-40% to that and still the same problem.

I know this engine hates me, or loves to eat at my wallet. I've built a dozen engines with out a single problem, but all of them has had a good ol Holly on top.

Kodiak
are you cutting your rings to fit? as far a the TBI go if its all hooked up you wouldnt have this problem. the knock senser should have reg. the time, and if it was out of range it should turned on the check engine light. if it was to lean then the o2 sensers skould have warned you. i dont belive it burnt a hole in the piston just ridding down the road. WOT in a 1/4 mile maybe. i hope you can get good pic. i dont know for sure but i think the computer would cut the motor off, if it got that lean.