TOO QUIET PIPES
Elite HDF Member
Joined: Apr 2006
Posts: 3,823
Likes: 2
From: THE MARITIMES Canada
RE: TOO QUIET PIPES
On the later bikes, carb or fuel injected made no difference when it came to sound. The "Harley" sound has been gone for years, blame the EPA. If you want quality and sound, then go with Vance & Hines, Bub Rineharts or Bub 7's.
Outstanding HDF Member
Joined: Jun 2007
Posts: 2,687
Likes: 6
From: Kalaui Kona HI
RE: TOO QUIET PIPES
Just get a set of quality pipes the V&H with quiet baffles run a low rumble and are not over the top loud but you can hear me coming. Reinharts are great also. I would not recommend running nobaffle by the way.
Outstanding HDF Member
Joined: Jul 2007
Posts: 2,424
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From: Hoboken, New Jersey
RE: TOO QUIET PIPES
By just removing the baffle, it will only make it sound cheap....and to top that off it will totally destroy your bottom end torque. There has to be some restriction in the pipe to create back pressure, or you will loose some HP/Tq. When you say stage-1 are you including a exhaust system in that, or are you just running the stock exhaust with fish tail tips on them?
As far as the old Harley sound.....well they dont sound like that any more, but its not because of the F.I.....or the EPA. It has more to do with the engine itself....the "twin cam" engines will never sound like a pan head....never.
As far as the old Harley sound.....well they dont sound like that any more, but its not because of the F.I.....or the EPA. It has more to do with the engine itself....the "twin cam" engines will never sound like a pan head....never.
6th Gear
Joined: Oct 2007
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From:
RE: TOO QUIET PIPES
I'm a novice in these things, but I found this article that explained volumes.
http://www.mslmagazine.co.uk/features/mil-music.htm
http://www.mslmagazine.co.uk/features/mil-music.htm
Grand HDF Member
Joined: Oct 2004
Posts: 3,842
Likes: 502
From: Northern WV
RE: TOO QUIET PIPES
ORIGINAL: capnron
I'm a novice in these things, but I found this article that explained volumes.
http://www.mslmagazine.co.uk/features/mil-music.htm
I'm a novice in these things, but I found this article that explained volumes.
http://www.mslmagazine.co.uk/features/mil-music.htm
• Active intake and exhaust system
They did this by installing a butterfly valve in the lower of the two separate exhausts on each bike (the emissions catalyst is in the other), as well as a flap-valve in the air filter intake duct. These solenoid-operated devices are linked and controlled by the Delphi ECU, which in addition to its normal engine management function, has what must be an extremely complex additional programme mapped to operate these valves according to a variety of parameters - engine revs, road speed, throttle opening and gear selected. So fire up the engine from cold on the automatic choke and blip the throttle at rest, and you may be surprised at how muted the Big Twin sounds as you relish its lilting idle. Get the show on the road, and at part-throttle in lower gears running at slower speeds, the ECU will figure you’re in an urban environment, so makes the valves work in concert with one another to muffle the sound of the Twin Cam 96 motor - depending on the mapping, either one valve or the other will shut, or sometimes both.
Outstanding HDF Member
Joined: Jul 2007
Posts: 2,424
Likes: 0
From: Hoboken, New Jersey
RE: TOO QUIET PIPES
ORIGINAL: Ridewva
Do the US spec'd HD's have this same exhaust set-up?
• Active intake and exhaust system
They did this by installing a butterfly valve in the lower of the two separate exhausts on each bike (the emissions catalyst is in the other), as well as a flap-valve in the air filter intake duct. These solenoid-operated devices are linked and controlled by the Delphi ECU, which in addition to its normal engine management function, has what must be an extremely complex additional programme mapped to operate these valves according to a variety of parameters - engine revs, road speed, throttle opening and gear selected. So fire up the engine from cold on the automatic choke and blip the throttle at rest, and you may be surprised at how muted the Big Twin sounds as you relish its lilting idle. Get the show on the road, and at part-throttle in lower gears running at slower speeds, the ECU will figure you’re in an urban environment, so makes the valves work in concert with one another to muffle the sound of the Twin Cam 96 motor - depending on the mapping, either one valve or the other will shut, or sometimes both.
ORIGINAL: capnron
I'm a novice in these things, but I found this article that explained volumes.
http://www.mslmagazine.co.uk/features/mil-music.htm
I'm a novice in these things, but I found this article that explained volumes.
http://www.mslmagazine.co.uk/features/mil-music.htm
• Active intake and exhaust system
They did this by installing a butterfly valve in the lower of the two separate exhausts on each bike (the emissions catalyst is in the other), as well as a flap-valve in the air filter intake duct. These solenoid-operated devices are linked and controlled by the Delphi ECU, which in addition to its normal engine management function, has what must be an extremely complex additional programme mapped to operate these valves according to a variety of parameters - engine revs, road speed, throttle opening and gear selected. So fire up the engine from cold on the automatic choke and blip the throttle at rest, and you may be surprised at how muted the Big Twin sounds as you relish its lilting idle. Get the show on the road, and at part-throttle in lower gears running at slower speeds, the ECU will figure you’re in an urban environment, so makes the valves work in concert with one another to muffle the sound of the Twin Cam 96 motor - depending on the mapping, either one valve or the other will shut, or sometimes both.
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bobby5
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Apr 21, 2007 07:08 PM
