Hi Phil,
I was running 100 octane race gas (unleaded). I'm running
this FF Power Package kit. Also have the DBW unit for the EFI. It has been dyno tuned numerous times on 91 octane.
I don't know if it is a 2.5" pully - the kit information doesn't mention the pully size only says "raises boost to 8-10 psi depending on exhaust system upgrades". I'll know pully size soon enough when I start pulling the motor apart and can physically measure it.
I don't know exactly what killed the engine, but I did have a full tank of 100 octane + it was the 1st morning session so ambient was only 78-80 degrees and oil and water temps were all good for track duty.
But yeah, if it is pushing 14 psi boost post IC on a 2.5" pully, then yeah I can see the problem is really too much boost. But like the information on the kit suggests, 8-10 psi so I can't believe a 2.5" pully was being used?? I would have never purchased the kit if it was 14 psi because I know that doubling boost on a stock motor with 11:1 compression is certain death. I hope you're wrong Phil, cause I'll be really pissed if you're correct. I got this kit because it was only 2-3 psi over stock, NOT 7 psi over stock.