Re: Plug gaps?
Way back, we found on some street supercharged cars that the "candles" seemed to be getting blown out as boost and of course rpm increased, the guys were using some plugs advertised to be "all the stuff"
some unobtanium material, 37 ground straps (get the picture) I swapped the plugs to an NGK race plug
R567X-x type of part number advised to gap at .025 and voila the lights stayed on!, Also in my Suburban
I had a local shop do a new exhaust (hate working on street stuff) they put some platinum whatsit plug at .065 gap, the truck would misfire towing on anything but a gentle acceleration (turtle). I put some non resistor autlite race plugs, 2 ranges colder and .030 side gap and the problem went away.
My point? Go at least two maybe three colder, you can find charts on how to read the strap for heat range, non resistor and keep the gap low there will be little gains in a big gap and much greater chance of misfire.
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