I had somehow spun a rod bearing.
A bit frustrating to say the least. I spun a few cranium bearings just thinking about that one. Can't say for sure what caused it on a GM crate motor with only 1500 miles that I carefully broke in. I guess my overly-safe 5750rpm rev limiter didn't help either. My only guesses are oil starvation or I got a lemon. When I pulled the motor and disassembled it, fortunately no harm had been done other than to have the forged crank polished. I replaced all the bearings(clearances checked out okay), flushed the oil passages, rebuilt the oil pump, and added an Accusump system to ensure there are no future oil starvation issues under cornering. The Accusump box said I should at least be able to get another 1500 miles out of my crate motor with this system before needing another rebuild, so hopefully I can actually finish the event this year.
If not, I'll yank the engine and tranny and install a bicycle pedal system(better launch control).
It'll be great to see you there again.
