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How to Calibrate a Nitrous Engine for an RC Car

Many hobbyists enjoy tuning their remote control (RC) car engines for the best-possible performance. Some RC cars are outfitted with nitrous engines. Nitrous gas provides a boost to the vehicle's acceleration, helping the driver win races. However, RC car owners must calibrate their nitrous engines to avoid engine damage and poor performance.

Things You'll Need

Screwdriver
Micrometer

Instructions

- 1
  Locate the high-speed needle. Consult the specific RC car owner's manual to verify this particular needle assembly. Turn the high-speed needle clockwise, with a screwdriver, until it stops turning.
- 2
  Turn the high-speed needle counterclockwise 2.5 turns with a screwdriver. This process centers the needle for subsequent adjustment.
- 3
  Repeat steps 1 and 2 for the low-speed needle.
- 4
  Locate the idle-speed needle by consulting the owner's manual. Observe the throttle opening on the needle assembly. Adjust the idle speed needle screw with a screwdriver until the throttle opening measures 1/32nd inch. Use a micrometer to confirm the measurement value.
- 5
  Turn the RC car on and accelerate forward. Any stalling indicates a lean high speed needle adjustment. Turn the high speed-needle counterclockwise by 1/8th inch with a screwdriver. Test the acceleration again. Continue to adjust the high-speed needle until the vehicle does not stall during acceleration.
- 6
  Allow the RC car to idle for approximately 15 seconds. Accelerate the vehicle and observe the action. Any stalling or hesitation requires more fuel to the engine. Turn the low-speed needle counterclockwise by 1/8th inch with a screwdriver. Test the vehicle again. Adjust the needle until the RC car accelerates without stalling or inconsistent motion.

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