spark plugs

[Creppers]

whats the difference in a autolite 103 and 106 is one hotter or colder I am running a 2.3 bored 30 hyd head with 110 race gas

[Browndog]

With Autolite, the higher the number the plug gets hotter same as Champion. NGK is opposite, the lower the number the plug gets hotter.

[Dirtman29]

Ive always ran autolite 764 with good results. Same setup with 60% 93 octane & 40% 111 VP race gas.

[car62]

ive run all of the above, currently running the Autolite AR472

[let-r-eat]

Champion RS9YC is best

[return to dirt]

motorcraft agsf-22-fm or ngk. don't have an ngk at the moment for the number. also ran ngk in my Nissan and Toyota.

olin

[84Dave]

My personal experience, at least on the 231HP OHC 2.0L Ford Pinto/Cosworth block. Whatever spark plug you decide to use, modify it to a J-gap, if not already that configuration. J-gap............. the ground electrode filed back on the end so the end of the electrode is in the middle of the center electrode. Then gap the plug to .035". Oh...... the 2.0L likes a projected nose on the plug. Your ignition & fuel-mixture will love you! -Dave-