TOAK, The Thread of All Knowledge part XIV.
Timdian will be there in a flash
Join Date: Mar 2014
Location: TOAK Northern Branch
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Agreed. But Harleys respond very well to reduced back pressure. It's a very primitive ICE by current standards (not that there's anything wrong with that - all my bikes fall into that category). You increase gas/air and reduce back pressure, HP goes up. It's one of the few motors that you can run straight pipes and not ruin performance.
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nevada72 (07-08-2023)
Open pipes are good for cheap hp. A properly designed exhaust system will increase hp and torque.
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nevada72 (07-08-2023)
Dynamic charts show the M8 likes more back pressure than not. Removing the cat reduces low end torque. That's where a properly designed exhaust and tune come in.
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gamble71 (07-08-2023)
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NoRegerts (07-08-2023)
The other thing - the felt heat went WAY up with the Supertrapp. It melted Cheryl's boot sole. The D&D was way cooler because it was less restrictive.