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Old 06-26-2016, 07:25 PM
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Dwight Dwight is offline
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Join Date: May 2001
Location: Florence, AL
Cobra Make, Engine: RCR GT 40 & 1966 Fairlane 390 5 speed
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Last Monday I changed the plug gap on a 408 from .045 to .050.
It would miss a little at 4500 rpms. Re-gaped the plugs to .045" and it would pull to 6,000 with missing.
This is a 10. to 1 cr motor.

I did not see what your plugs were gaps at.
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