Join Date: Jun 2001
Location: Cedar Rapids, IA
Re: spark plug gap question
I'm also running the msd-6al. My question was a somewhat hypothetical question to the extreme. I'm running .045 on my plugs and I think I'm having a slight fouling problem. The motor has an occasional miss. I noticed this when I was timing the motor at 3200 rpm. I installed new plugs this spring and have not pulled them yet to check, but the ones I took out were dark brown to blackish. MSD says for motors up to 10.5:1 compression the gap should be .050 to .060. I didn't know that. My motor is 9.3:1 compression. I'm going to move to a .050 gap or just alittle over this weekend to see if that takes care of it.
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67 Camaro, 454, TH400, 9" 4.11's
Last edited by camaro man; Sep 15th, 05 at 06:32 PM.