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Well SOB, so on a truck engine even with highest octane pump gas (91-93), you're screwed?

I've done an N/A to boost swap before, but there wasn't that much difference in CR so it wasn't an issue. <img src="/forums/images/graemlins/frown.gif" alt="" />


I ran 8.7 to 1 CR pistons with a stock Starion turbo system and got that same light part throttle detonation. I found that the primary spring on the advance weights on the Starion distributor was super light allowing a lot of mechanical advance at a low RPM range.

By swapping in the springs from the carb motors distributor I was able to slow the advance curve so that I did not get the part throttle detonation.

Kevin

87 Turbo Intercooled Raider, roller cam, torsen rear diff, LSD front diff, lockup auto with modified converter, V6 brakes, low transfer case gears...