Harley Davidson Exhaust Back Pressure

Youll know if you have too much back pressure as the motor wont rev quickly the pipes will turn cherry red at the exhaust port and the motor will over heat.

Harley davidson exhaust back pressure. The back pressure is the negative half of the sign wave the exhaust flow is the positive half of the sign wave. 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. Discussion in Engine Fuel and Exhaust started by marknett Jun 2 2011.

The Up Yours Harley Performance Exhaust was designed John Shope to increase horsepower and has a high performance baffle for back pressure perfect for your touring big V-Twin or Milwaukee 8. There is no mistaking the sound of a Harley motor with straight pipes. The end of the hose is supposed to suck and the exhaust is supposed to blow.

Pass me a Shiner Bock. Harley Davidson Motorcycle Exhaust. If the arrival of the negative reflected pressure wave at the exhaust valve can be arranged to occur during the later part of the exhaust cycle the resulting lower pressure will enhance the removal of exhaust gas from the cylinder.

We got our start making exhaust pipes for the V-ROD and now make exhaust for all of the Harley-Davidson and Indian Platforms. The most common part replaced on a new Harley-Davidson motorcycle is the exhaust system. I have used them on one of my TC builds with low back pressure set.

With single pipes what is important is pressure wave tuning each exhaust pulse sets up a pressure wave that bounces back and forth between the port and pipe end. Harley Aftermarket Exhaust If the pipes are open and not restrictive and the baffles are properly optimized you can unleash maximum power from your bike simply because of the enhanced efficiency. VH designed this exhaust to be more than just a louder alternative and more of a proper performance upgrade.

Backfire on deceleration or acceleration on a Harley Davidson is due to the burning of excess fuel in the carburetors intake port. So it states that the reflected pressure wave Back pressure enhances the removal of exhaust gasses. There are a big variety of silencers baffles end-cans etc.