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Old 04-25-2002, 07:35 PM   #1
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Join Date: Apr 2002
Posts: 5
Force 12 needle settings

I've got a Force .12 engine in my Ofna Nitro OB4 and was wondering how many turns do you run your needle settings at to get best performance. I'm not having problems with it I just want to get the engine running nicely.

Thanks for any help;
Alex V
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Old 04-26-2002, 07:40 PM   #2
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Join Date: Aug 2001
Location: NJ USA
Posts: 166

The main needle will be at 2 1/2 turns out in cooler weather, in hot weather 75 degrees or more maybe 2 turns out.
If you use fuel with more oil it will have to be leaned out even more. The low end should be flush or sticking out just a 1/32nd or so. Run the car hard and fast, bring it to stop. If the idle stays elavated for a couple of seconds, then goes back to normal, the low end needle is too lean. Running Blue thunder race, 20 % nitro in 60 to 70 degree weather the temp of the motor should never exceed 240. Put water on the cooling head, if it boils way in under 4 seconds its too hot.
You should richen the main needle 1/16th of a turn.
Really depends on temp, fuel, nitro content etc.
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