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Old August 26th, 2018, 01:39 PM   #6
DannoXYZ
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Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011

Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C

Posts: A lot.
MOTY - 2018, MOTM - Nov '17
Quote:
Originally Posted by Racer x View Post
What you loose is torque . I found that short open exhaust cost about one or two ft lb of torque. Plus added noise.
Long pipes seem to be the best for scavaging. The best system I ever made was 57 inch primary pipes and long cones. Then a reverse cone at the end. I kept open I g the outlet until the power stopped going up. About an inch and a half .
Is that 57-inches before 2-1 merge? I think there's an optimum angle for the cones on exhaust. Need to look that up...
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