How does a Tuned Pipe exhaust system work with our two stroke model engines?
1 – When the piston comes down far enough for the exhaust port to open, the burnt gases exit into the tuned pipe. As the gases reach the expanding part of the pipe they accelerate and draw more burnt gas out of the engine. 2 – As the piston continues down, the intake ports open and a fresh charge of gas enters above the piston and also helps push the BURNT gases out. 3 – The fresh charge has now pushed out the burnt gases AND some of the fresh charge has also gone through the exhaust port. NOW….The burnt gases have reached the rear of the tuned pipe and a pressure wave is reflected back toward the exhaust port. 4 – The piston is now comeing back up and the intake ports are closed BUT the exhaust port is STILL OPEN. The pressure wave PUSHES some of the fresh charge (which had exited behind the burnt gases) BACK into the engine. This action SUPERCHARGES the engine from the exhaust side and enables the engine to provide more power. For optimum performance, the reflective end of the tune
