December 17th, 2016, 07:01 PM
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Member
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Join Date: Dec 2016
Location: Townsend, MT
Truck: 1965 GMC 5000 6X6
Age: 27
Posts: 95
Rep Power: 70
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Re: Spark plug checkup.
Quote:
Originally Posted by TJ's GMC
Hi guys, just pulled the NGK's from my 305E with a 600 cfm 4 barrel, Pertronix hei, and dual exhaust. 10 degrees initial timing and gap at .040-.043. Not bad. Couple of them are shaded a little. All are burning a tad bit of oil from the valve guides. But I am impressed. Runs good. Put some AC delcos in and will test those. So far I have noticed a little more low end response. Overall no feel of better acceleration. Gapped at .055. They have a cross over for NGK's so I may end up eventually going to their version as I have never had one bit off issues with them. Plug numbered 1 - 6 from left to right.  |
Do you think the plugs were responsible for the added response or just the increased gap?
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