Why do you need to gap spark plugs?
12-27-2003, 09:48 PM
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Why do you need to gap spark plugs?
i understand for a boosted vehicle generally the gap is b/w .30-.34
but say you just bought some 7 series ngk's without gapping and ran it like
that, what would happen?
what is the whole idea behind gapping and why is it needed?
but say you just bought some 7 series ngk's without gapping and ran it like
that, what would happen?
what is the whole idea behind gapping and why is it needed?
12-27-2003, 10:03 PM
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Re: Why do you need to gap spark plugs? (dc2b18c1gsr)
12-28-2003, 03:34 AM
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Re: Why do you need to gap spark plugs? (dc2b18c1gsr)
If you don't gap the plugs then you will mis up top ro have a rev limiter effect. You end up blowing the spark out when the gap is too wide especially at higher RPMS. On my set up even with an MSD I gap mine at .020" My buddy who had a SOHC turbo set up threw some plugs in his just out of the box, ran like **** missed and rev limiter at like 6k, I took the plugs out saw them gapped at like .045" and then regapped to .030 and his car pulled smoothly up to 7K+ 
12-28-2003, 05:31 AM
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Re: Why do you need to gap spark plugs? (Boostfed)
funny.. i gapped mine to .030 and i was misfiring up top, but when i regapped to around .020, my idle was quite rough, but my car pulled like a **** to redline.. this is on a stock gsr boostin around 10 psi...
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