Harley Davidson Exhaust Back Pressure

The first item to get modified or changed on most new Harley-Davidson motorcycles is the exhaust system.

Harley davidson exhaust back pressure. Considering how much the stock exhaust chokes the motor any open baffle system around 1 34 inches would suffice. There is no mistaking the sound of a Harley motor with straight pipes. Backfiring during acceleration typically signifies air in the intake system of a Harley Davidson.

21 and other multi pipe collector systems work through scavenging the adjacent pipe exhaust pulses actually help suck gases out of a paired cylinder as the valve opens. So it states that the reflected pressure wave Back pressure enhances the removal of exhaust gasses. A lean air or fuel mixture from the carburetor of a Harley Davidson results from drastic changes in the pressure.

I have used them on one of my TC builds with low back pressure set. To a huge extent like changing the primary head pipe to 2 on a stock engine can slow exhaust speed down this loosing ability to get are in and out of the motor. The back pressure is the negative half of the sign wave the exhaust flow is the positive half of the sign wave.

Expert Gear Advice From Riders. Ever since Cobra introduced the 909 slip ons they have been getting requests for a version that aligns perfectly with the bags. Its not because theres not enough backpressure its because there isnt enough airflow and the momentum of the air will be broken up.

Harley Davidson is developing a dynamic exhaust system design that redirects exhaust gases depending on engine RPM and throttle opening. If while in operation you took an air hose and blew it up the exhaust that would create a back pressure in the exhaust effectively reducing the amount of suction at the hose end due to the air pressure up the exhaust. When installed inside the head pipes these cones act to repel the pulse waves as they return to the engine and alter velocity as the gas passes through the narrower passage.

TAB Performance is a leader in manufacturing high performance motorcycle exhaust pipe systems mufflers and accessories for Harley-Davidson and Indian motorcycles. There are a big variety of silencers baffles end-cans etc. Cobra 909 Uppercut Slip On Harley Davidson Exhaust.