04-01-2009, 05:42 AM
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CC Member
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Join Date: Mar 2001
Location: E BRUNSWICK N.J. USA,
Posts: 3,841
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Not Ranked
Autolites
Scufty I run either 3924's or 3934 autolites for my car, depending on how hot it is at the track. This is with a complete MSD ignition system. I have run other plugs, like NGK,Champions, AC, ACCEL, and Denso. My FI motors runs best with autolites. The Champions made better power for the first 2, 20 minute runs and then the power fell off a little. Accels where just not a good choice. NGK I got a breakup in the ignition after 2 years of racing, about 15 20 minute curcuit runs. Autolites are built for Fords, my Ford for there motors. The denso are the only ones that didn't get a fair test because of the blower belt problems. They are for boost motors IMO. They cost about twice as much also. For the 6,200 rpm max on my motor, the powerband I stay within, the autolites work for me. They may not produce the most power but they are close. You can get some free power by just indexing your spark plugs also. Rick L.
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