[TurboAleroGT40]

Originally Posted by tejohnson

It was 289whp/345wtq prior to the last engine rebuild. That was on ~7PSI. After the rebuild, I was pushing 15 PSI.

At Pontiac Nationals in 2006, after the rebuild, I pulled the 13.4 1/4 mile on bad detonation, which resulted in the rod bearings loosing their crush. This resulted in the reaming of the #5 rod journal removing ~.006" of material and bending the crank ~.009" . We magnafluxed the crank checking for cracks, bent back in to spec, magnafluxed again, then turned the crank removing .010 from all the journals. (work was performed by WRP). Now the crank is in, and pistons and rods are about to go in with oversize Clevite bearings. All of this simply because I plumbed the Walbro fuel pump and assumed the little port on the pump was a high pressure line. It is actually a pressure relief. So it was not feeding the venturi puump drawing fuel into the pump assembly. So the 65# mototron injectors was starving the fuel pump... I pretty much ran out of fuel on the track, leading to BANG, BANG, BANG!

A stock engine would have yielded a few popped pistons

Hey dude , hmm what was the problem with the Walbro fuelpump? Because hmm did the same as you did with mine.