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Old 05-18-2008, 11:52 PM   #1
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Default new to nitro pleas help!!!

new to nitro have a few problems. have werks .21b7 pro was running 20% nitro went to 30% wrecks fuel started buying plugs quick went trhough three in one day at 9 dollors a pop i wanna fix this problem. when i take the plug out they are brown golden color with few little black build-up spots. exhaust has smoke coming out so i dont think its to lean but don't know new. also since i switched it will not idle for more then a couple secounds with out giving it throttle. motor is running 180 and it flys when its on the track will run with 1/8 buggys no problem and the motor is in a 8t. if anyone one has any suggestion i am open. has no head shims and am using os p6 plugs
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Old 05-19-2008, 12:49 AM   #2
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If youre running 30% fuel, you should have shims, Im not sure how many though.

If youre running 30% you should have med-cold plugs.

If youre running 30% and doing a lot of WOT driving, then definately get COLD plugs.

If it wont idle, play around with your needle idle on the engine, go by half turn increments until you see a differnce, then quarter turns from there until you find it hits the perfect spot.
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Old 05-19-2008, 05:19 AM   #3
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im not sure what werks motors call for on head shims for 30 percent fuel.. that is definetly the reason you are burning plugs
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Old 05-19-2008, 07:42 AM   #4
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It is a tuning issue... I run a Werks B7 Pro with Sidewinder 30% Worlds Blend fuel, no extra shims... out of the box it is shimmed to run 30%. I'm on my 6th gallon of fuel. Sorry, I don't know what plug to suggest... and you might be rich on the bottom but lean on top. Get someone to help you tune it. I've used exactly 3 glow plugs in that 5+ gallons, and actually never had one FAIL, just changed them because I thought they were getting old enough to be risky in a race.
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Old 05-19-2008, 10:28 AM   #5
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Default head shims

thanks for the help guys does any one know what head shims to use. i have some from a nijia motor but i want to make sure i use the right size thanks
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