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Old 07-11-2007, 09:03 PM
JG700 JG700 is offline
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engine pinging

Hello. Recently (100 miles) rebuilt 350 sb bored 30 over, mild cam. Auto tranny. Car runs great, except it pings upon hard acceleration (like from a dead stop.) Sounds like a lot of marbles rolling around, small popping sounds that eventually stop after the car gets up to speed.I had the q-jet rebuilt also. I tried retarding the timing from 12btc to 8 btc, and had the carb jets increased from 72 to 73 because it was running very lean. Still pings/pops. What else can I do? Would further increasing the jets help, or adjusting the timing back again? Any ideas/suggestions would be greatly appreciated! JG700
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