which plugs?
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From: New Egypt, NJ
When I was into stock car racing I remember that the rule of thumb was to run the coldest plug you could without fouling.
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Road Captain
Joined: Jun 2006
Posts: 580
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From: Colorado
The HD 10R12 plugs are also an option. I used them on a previous build and just 1 or 2 ranges colder than the stock 6R12. I like that they have a solid connector tip like stock and won't vibrate loose.
http://www.harley-performance.com/ha...park-plug.html
http://www.harley-performance.com/ha...park-plug.html
Seems like I remember reading somewhere about the newer ECM systems using the plugs and wires to get readings and they don't recommend changing from stock because it will affect those readings negatively. I'm thinking of relocating my coil and haven't done it yet because of this. Anybody know if this is true or ???