Twin Turbo LS1

[gearheadgarage]

Thanks for the input Troy. Looking to pull the engine out & assess in the near future. Although all knock sensors are in place & there has never been any hint of detonation through any of the tuning sessions, I agree that that may well be the issue. On the way back from Pleasanton I was WOT and pulling solid boost for a steady period of time (140+ mph?) I felt the car jerk 2x as I started to romp past that and subsequently lifted back out of it and cruised a steady 80mph the remaining 20 miles back to Sac.

I don't think the bearings failed at that point specifically.....not likely. I would expect to see some ring lan issues, piston problems or the like if HARD detonation occurred. The fact that I felt it proves to me that there was indeed some sort of detonation, likely not the 1st time. I run it hard & often, and can't say for sure that it hasn't been detonating at inaudible tones.

I am, however, happy to not have experienced catastrophic engine failure. At least now I can study the situation as I disassemble and look for clues. I appreciate the good word-

Any opinions on the rumored poor oil return in the ls1,6 &2 blocks? Another possible issue? Should I repair & re-tune as my wallet prefers or should I dive in deeper. I know the answer, but just asking!!!