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ANY OTHER ADVICE??

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#13

08-08-2015, 03:31 PM

njsteve njsteve is offline

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Re: ANY OTHER ADVICE??

Reminds me of the 455HO in my old black 72 Firebird Formula. I could not stop the pinging even with the timing backed off 15 degrees. Pulled the engine out to rebuild it and discovered that someone had installed 12 to 1 pistons in the engine (which was designed for 8.4 to 1 compression ratio).

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