The idle screw sets the gap in the carb venturi and regulates the air that enters the carb with the throttle closed. The idle screw is usually overlooked when talking about engine tuning. Always tune the engine with the first tank you are running that day after you have it set you shouldn’t have to tweak it much more during the day. If you’re bashing around the yard, then tune it in your yard. If you’re racing this Sunday at the local track, and you tune your engine Wednesday during your lunch break at work, you will probably need to retune it Sunday. Tip: Tune your engine on a day-to-day basis.
#RC CAR TUNING FULL#
If you’re unsure where to begin and you’ve already altered the needle, richen the main needle two full turns from its fully closed position. When tuning, turn the needles in one-hour increments and allow 30 seconds for the adjustments to take full effect. That screw head gives you twelve hours per one full turn.
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Imagine that the head of the needle valve-the part that looks like a screw head- is a clock face. The same holds true for the fuel, the more you open the needle, the more fuel will flow into the carb. Open the spigot for more water or close it for less.
Needle valves are like a garden hose spigot. We will look at the high and low speed needles and the idle adjustment screw. No matter how advanced you are in engine tuning, it always comes back to the basics. It’s like the old saying, “You have to learn to walk before you can run.” The same is true when tuning your nitro engine-you have to learn the basics of the carb and tuning terms before you can tune. But first we’ll need to learn the basics. This is where I come in its time to teach you about needles and utilizing them to tune for performance. Heck, some people are afraid to work on a nitro engine simply because they don’t want to work on its mechanics. Wouldn’t it be great if you could just clap your hands and your nitro engine would start up? Another clap and it tunes itself? Unfortunately we’re not that lucky, we have to tune the engine to run and or improve performance.
#RC CAR TUNING TV#
Have you ever seen “The Clapper”? You know, that thing they advertise on TV to turn your electrical appliance on by simply clapping your hands.
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