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RC Glossary


New to the RC Hobbies? What does buggy, bulkhead, nitro mean in radio control car hobbies? Check out the glossary for remote control cars below.

Back Pressure íV Plugging Pulse íV Super charging --

The percussion (pressure) a pipe or muffler sends back to the combustion chamber of a nitro engine just before the exhaust valve closes. Also known as a ""plugging pulse"" or ""super charging"", back pressure helps to push the fresh air / fuel mixture back inside the combustion chamber instead of allowing it to follow the exhaust gases out. Mufflers provide back pressure, but tuned pipes are optimized to provide the right amount of pressure at the right time (this can be tuned by pipe length or size) - this means more fresh air and fuel in the chamber, better efficiency, and more torque and speed. With tuned pipes, the speed of the returning back pressure can almost reach the speed of sound. The pressure line routes some of this back pressure to the fuel tank to help push the fuel towards the carb.
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