2 inot 1 pipes
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2 inot 1 pipes - 5/20/2008 11:51:33 AM
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FX4 Level II
Posts: 44
Joined: 4/25/2007
Status: offline
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So my future in-law has a '97 Dyna 80ci, high flow heads, cams, ignition, carb, some minor changes. Another guy we ride with has the EXACT same work done at the same time, the tow are identical except for air cleaners. The in-law was always faster, then bought a 2 into 1 pipe, thinking it would increase horsepower, and he actually LOST power and now is slower than the other guy? Any suggestions as to why?
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RE: 2 inot 1 pipes - 5/20/2008 12:03:09 PM
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bigbobber33
Posts: 20
Joined: 5/31/2007
Status: offline
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Did he rejet and compensate for the 2-1? If he did and still lost power, then I would take a look at the cam specs, they may not work well with a 2-1, for example if he had it custom made...The cam should match the pipe closely, and the carb jetting too....
When I was a youngster I gave myself a headache, going through three different cams, to get a decent amount of power our of my 80"...All this because I wanted to run straight/drag pipes....Not to mention the tuning was a well remembered lesson...
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" Dream as if you'll live forever. Live as if you'll die today " - James Dean
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RE: 2 inot 1 pipes - 5/20/2008 12:03:29 PM
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labfreak
Posts: 1079
Joined: 7/22/2007
From: The Left Coast
Status: offline
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My guess is the back pressure of the 2-1 has to be compensated for...his bike is carbeurated, right? Maybe adjust the AFR?
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2007 FXD
K&N Hi-flo A/C
Python 2-1 exhaust
Stg 1 download and XIED''s
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