spark plug gap question - Team Camaro Tech
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post #1 of 3 (permalink) Old Sep 15th, 05, 04:37 AM Thread Starter
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Marc
 
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spark plug gap question

What kind of problems could crop up if your running a plug gap of .045 when you should be running .060?

Marc


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67 Camaro, 454, TH400, 9" 4.11's
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post #2 of 3 (permalink) Old Sep 15th, 05, 05:19 AM
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Re: spark plug gap question

What do you have that calls for .060 ?

If you run a smaller gap than called for, you may cause some fouling of the plugs (not hot enough spark), but it is easier on the coil.

I run the MSD6al/HEI set up and can go as high as .060 but run at .050 for safety measure, plus it runs clean there.

68 Camaro~LSx ~all motor
1.54 60'--6.95 @ 98.45 660'--10.96 @ 121.53
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post #3 of 3 (permalink) Old Sep 15th, 05, 06:04 PM Thread Starter
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Marc
 
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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.

Marc


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67 Camaro, 454, TH400, 9" 4.11's

Last edited by camaro man; Sep 15th, 05 at 06:32 PM.
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