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Spark plugs?
Generally, most GM's like AC plugs, and most Fords like Autolites.
MSD recently nixed the idea of platinum tipped plugs with MSD ignitions. Most folks here use MSD or somebody's CD ignition. And most folks here are not using stock Ford heads. There must be some preference for brand, type, and gap setting. TFS head calls for an Autolite 3924. This is not a Ford plug, but it is an Autolite, and runs fairly well. Gapped at .050". Splitfire 392D runs fairly well also. But $50 worth of Bosch +4's were pulled in a week, so these motors do have their preferences. What are you folks using for brand and gap setting with MSD ignition? |
Autolite 3924 gapped at .035.
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352W bored 40 over with AFR heads and MSD Digital 6 w/Pro billet dist. Champion RC9YC gapped at 50. This was recommended by AFR. Car runs great.
Roscoe |
Run the autolite 3924 plugs at 45-50. Most aftermarket ignition manufacturer's recommend against platinum, split tip, U-grooved, or any other newfangled plug design. You are better to buy four sets of regular autolites and replace them more frequently than to buy $5 plugs.
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Thanks fellas.
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Most of the advantages to platinums are long life in a nonperformance engine. They last longer, letting the car makers tout their "longer times between tuneups".
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Had originally planned to use...
The split tip platinum types, but I have since tried them in my Yamaha V-Max bike, and they are not any better than a good NGK plug. The split types have some other problems with electrode wear too, I am told by my bike mechanic.
I plan to use AC or Autolite plugs, gapped as wide as feasable/reasonable. I will have the MSD ignition and blaster 2 coil |
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