Thread: What spark plugs do you use?

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Thanks guys.....Denny, youdaman again...nicely put....I will fudge a bit and state that hot street motors can benefit from indexing according to the set up.

NGK split fire for the 427,she runs a 50pump/50-110 mix gas, more carbon build up and NGK cleans well. Same with the stock Mustang 289, but in the daily drivers that run 89 octane, I run the platinum.

nothing but Motocraft unless i can't get those, then Autolite & I've been running those in my Chevy's since the late 70's.. you couldn't give me a Champion or an AC plug to use, unless i was using them for wieghts for fishing ...joe

standard autolite 86's for street and standard autolite (85's for the track one range colder for the track)

NGK's must be firing better on the high voltage quality ignition systems, they are a lot easier to read. Don't know about the dyno results, never have done run to run comparisons I guess... I do know that on the circle burners we have run, the NGK's sure do fire nice and last quite well too... As for the drag cars, hate to admit it but my beloved Autolites have not held up as well in the high compression E-90 fueled engines as well as the NGK's. Can't even remember the last time I bought any Chamions for anything...... Never did have a bit of luck with them. Not being a chebbie guy, been just as long since I bought a set of AC's.... In the cheaper (if you want to call it that!) circle burner classes the boys seem to lean towards the Autolites, but most all the hard chargers (aka winning cars) in sprints, late models, IMCA and Wissota mods all seem to be running the NGK's. Made a walk down the ASCS sprinter line in the pits, not a car there running anything other then an NGK, just a few different numbers. Must work good with their spec engine setup for some reason, seems the Brodix heads always run best with the NGK plugs.....

I guess next I'll find out there is no Santa

Originally Posted by Dave Severson

NGK's must be firing better on the high voltage quality ignition systems, they are a lot easier to read. Don't know about the dyno results, never have done run to run comparisons I guess... I do know that on the circle burners we have run, the NGK's sure do fire nice and last quite well too... As for the drag cars, hate to admit it but my beloved Autolites have not held up as well in the high compression E-90 fueled engines as well as the NGK's. Can't even remember the last time I bought any Chamions for anything...... Never did have a bit of luck with them. Not being a chebbie guy, been just as long since I bought a set of AC's.... In the cheaper (if you want to call it that!) circle burner classes the boys seem to lean towards the Autolites, but most all the hard chargers (aka winning cars) in sprints, late models, IMCA and Wissota mods all seem to be running the NGK's. Made a walk down the ASCS sprinter line in the pits, not a car there running anything other then an NGK, just a few different numbers. Must work good with their spec engine setup for some reason, seems the Brodix heads always run best with the NGK plugs.....

I tried to tell them.

I guess next I'll find out there is no Santa

I know for a fact there is a Santa, if it wasn't for Santa I would not have half the parts for my car.

I also use NGK's. Just standard resistor plugs. No fancy platinum for me, I don't think it would make a difference in an old chevy anyways.

standard autolites must not be to bad sereing as a guy here runs high 8's with the bottle low 9's without and has no problem and at least here its 8out of 10 use autolites probably 9 out of 10 guys.

wasnt their a thread on indexing plugs?