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"clocking" or indexing spark plugs so the electrode doesn't hinder the flame propagation can add just a little power in all -out race/drag engines. I have slightly different thickness copper plug washers from Jegs Racing, for doing just that, except I use a new washer every time I pull and replace my 1952 Army M37 Weapons Carrier's plugs for various reasons. However this can't work on a plug with a tapered seat, and might hinder temperature transfer between plug and head anyway. But the concept has been around for a long time. NV
He is far from that concept. I think he needs a new dyno and tuner.
 
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