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Old 06-05-2008, 12:45 PM   #1
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Default Witch plug should i use

I have an sts.12rs and looking for some help on witch plug i should use. I think a had a os5r in it but not sure. The plug is all black. Just got a race coming up and want to get some new plugs for it. Any help would be great.
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Old 06-05-2008, 01:22 PM   #2
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As a rule of thumb, the higher the nitro content the cooler the plug. If your running 30% nitro you'll want to run a med. to med. cold plug. Run a plug that is too far down on the cold scale and you'll have trouble with idling and getting it tuned properly. Running a plug that is too hot and you'll have detonation problems. If the detonation is severe enough, it will burn a hole in the piston. You can also fudge a little in either direction depending on the weather conditions. I prefer to run a med. plug because the engine idles and tunes good plus it doesn't cause detonation problems
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Old 06-05-2008, 01:39 PM   #3
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As of right now its running on traxxas topfuel 33 but it will be going to sidewinder race blen 20 after that. Iwas was wondering if i should go if a short plug like the os's or a mcoy8/9 plug. Ido live in Michigan were the temp can get into the 90's too
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