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03-15-2002, 10:46 AM
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#4 |
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or '331 LX Eric'
Join Date: Jan 1999
Location: Columbus, Ohio
Posts: 2,142
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Do you have the iron GT40's or the aluminum turbo swrils? Generally speaking you can run more timing with aluminum heads than you can with iron heads - don't ask me how. I think PKRWUD answered one time, but I can't remember.
Anyways, if they are iron, try 13 or 14 degrees with 92 octane and see how that does for you. If aluminum, try 16 or so. I used to run 17 with my TFS heads and 94 octane with no pinging - ever. Gains are going to be minimal, but definitely worth it. Maybe 3,4 or even 5 hp, every car seems to react a little differently. Hope this helps. E
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1991 5.0 LX Coupe - 40,750 miles 331 cu. in. / Tremec 3550 / BFG Drag Radials 12.22 @ 114.31 mph - w/1.89 60' |
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