Rapid Robert
Well-Known Member
360 circle track engine. would I gain by going up or down from the std .035" gap? std mopar dist/pertronix race coil/module. thank you for your time. RR
You can side gap the plugs, but as mentioned, I still wouldn't go more than about .035 - .040.
A friend of mine ran as wide of a gap that his ignition system would support. If I remember correctly he ran a 0.055" gap. The larger gap provides more spark to the mixturePertronix says .010 over stock.
It's the coil imo in this case that determines which is best. I'd assume .035-.045360 circle track engine. would I gain by going up or down from the std .035" gap? std mopar dist/pertronix race coil/module. thank you for your time. RR
I'm sure that those plugs are shot. I'm not saying that you don't have them with the mileage you claim it's that I've never seen a plug that much of a electrode left with over 60k on themI have been running the Accel Square top supercoil since 2002 I think. The plugs were already 2 years old then, and are still in the engine today. They were re-gapped to .045 in 2004, the last time I freshened that engine. They have over 100,000 miles on them at this time.
I have not looked at the gaps since 2004.
It would be interesting to see the gaps today, but that ain't gonna happen lol.
I love that coil, best I ever bought.
Delco Plugs for HEI Chevy's used to come pre-gapped to around .080; IIRC
Buick had some plug gap specs at .080 in the 1970s. Cadillac also used a .120 gap for a short time also in the 1970s.We are talking about .060-.080 gaps. also not in the 70's... No body said when HEI it made its debut. HEI with precious metal electrodes, reread it. Gaps got wider when the precious metal electrodes came out.
The advantage of the HEI is that its more capable (or should be) in providing the voltage to jump a more difficult gap and maintain that spark once it begins. It also should be able to adjust the coil current at high rpm. In other words the ignition system should not be a limitation if you want to try .040 or .045" gaps.I would think that this is a pretty hefty ign (coil/module) & yes that a larger kernel would be a bennie but I've seen several sources (jacobs ign comes to mind) that recommended a smaller gap for power/racing which is confusing. RR