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Old 06-06-2004, 02:34 PM
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spark plug gap on BBC

Gentlemen,
I have just upgraded my HEI to an accel super coil.(the big yellow can remotely mounted.) It is working great, but I am curious what advantages or disadvantages could be realized by increasing the spark plug gap. I am currently running at about .035"- .040". I am running approx 9:1 comp. 454 BBC with 781 heads. Can you get a hotter spark with bigger gaps? are there problems with bigger gaps on the upper rpm/higher cylinder pressure situations? So far the improvement with the swap is noticable, just wandering if there is more to squeeze out of it yet. Thanks.

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Old 06-06-2004, 05:53 PM
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plugs

Probably not much to be found with the plug gaps on your motor. More important is selecting the propoer heat range for your set-up. The best thing to do is try a few different gaps and see what the results are. You may be suprised to find the smaller ( .030 / .035 ) gaps may work better for you.

keith
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