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dean dean is offline
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Join Date: Dec 2001
Location: MA USA
Posts: 2,938
Re: detonation/pinging??

Originally posted by mark '87 930
I noticed today that under WOT, I can hear pinging in the engine. After reading about detonation, I think this is what it is.

I installed a GHL header and B&B exhaust, and running .9 bar boost... Would that be detonation? I'm about to put the car away for the winter and was going to take it to the dyno in the spring to check the A/F mixture and make sure it is tuned as optimally as possible.

Is that detonation.. ? Should I reduce the boost? Could it be the gas I run (91 octane)?
You could also retard the timing a hair.

If it was a cold day that you noticed it pinging, then it is probably due to your air/fuel being too lean. The cold air is denser and so you get more air in the motor but not more fuel.

911 SC turbo, 3.0L 930 motor, G50, 930 brakes, DTA EFI, 352 RWHP DynoDynamic dyno,
Old 12-01-2006, 06:42 AM
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