Thread: pre-ignition?
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Bob Kontak Bob Kontak is online now
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Join Date: Nov 2007
Location: North Canton, Ohio
Posts: 20,832
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Try the "all in" timing at 25 and see what happens. I know it is a wimpy number, but the stock 81 is something like 24 max but with 87 fuel and 9.3:1 pistons.

At least you won't cook something while you troubleshoot.
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1981 911SC Targa
Old 12-18-2013, 03:03 PM
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