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Torque Cones, install a set of HEADER PIPE CONES into your headpipes! To increase lo-end torque and to create the correct amount of back pressure! A must for straight pipes! Simple to install between head and pipe.
People think straight pipes make
more horsepower. WRONG!
They are under the false impression that if the engine breathes better and gets rid of the unwanted exhaust fumes faster, they will go faster . . . Credit goes to Jerry Branch, the genius of Flowmetrics to understand how back pressure is needed to scavenge the unburned portion of fuel back into the
combustion chamber to create more horsepower.
IT REALLY WORKS!
PROBLEM: Harley riders & custom exhaust pipe manufacturers like PIPE DREAMZ, want the clean, cool looks and hot sound of straight pipes.
SOLUTION: Torque cones, (power cones, torque valves) a small 2” funnel style venturi valve that provides the correct back pressure by creating a tube constricted in the middle and flared on the end. This operates on the principle that the exhaust velocity will increase and it’s back pressure decreases when passing through the torque valve. At low speeds, the taper in the valve increases back pressure resulting in increased low RPM power and torque. At high speeds, the venturi effect created by the torque valve increases exhaust gas velocity. This maximizes engine power by increasing the rate at which the exhaust gases are drawn from the exhaust ports. *
*SIMPLER EXPLANATION: Picture your garden hose in your driveway WITHOUT a nozzle, and the water turned on full blast. As you can see, the water does come out at a strong steady stream.
Now, picture the same water hose with a spray nozzle attached (Venturi Valve). Watch the water blast out with 3 times the pressure! Same exact principal with your exhaust! The average Sportster or Dyna exhaust exits the cylinder in a cyclone circle, hugging the inside of the pipe and reverberating back and forth, up and down the exhaust pipe 6 to 12 times BEFORE EXITING! This clogs the system and actually slows your bike!
We here at PIPE DREAMZ strongly recommend using torque cones on any Sporty or Dyna with straight pipes, or any Sporty or Dyna with long pipes or mufflers.
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