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Old 12-15-2002, 11:55 PM   #1
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spark gap for autolite 3924

I need to figure out what gap to set my new plugs at. I installed these today but just screw them in by hand until I get the correct gap numbers. They are going in a 393 with afr 185's. They came gapped anywhere from .038 .041 Thanks in advance.
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Old 12-16-2002, 08:50 AM   #2
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I would like to know the same thing since I will be putting them in this weekend with my combo
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Old 12-16-2002, 10:03 AM   #3
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Im running them at 40 in my na 331 with all msd ignition.Seems to work good i did open them to 45 for a short time and saw no change so i set them back.
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Old 12-16-2002, 10:44 AM   #4
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in a N/A setup you can go bigger, try .050 this should be NO problem especially with an aftermarket ignition box
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Old 12-16-2002, 12:03 PM   #5
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Thanks, I just got back from racer walsh and eddie told me .050 . Now about torque?? How many foot pounds to you torque spark plugs down in aluminum heads. 15?
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Old 12-16-2002, 01:33 PM   #6
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Quote:
Originally posted by wazee
Thanks, I just got back from racer walsh and eddie told me .050 . Now about torque?? How many foot pounds to you torque spark plugs down in aluminum heads. 15?
just use good judgement and get them snug, there gonna feel semi tight(this is the washer crushing)then theyll start to get snug ive NEVER had a problem with hurting the soft aluminum threads and ive never had a plug back out on me.
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