Obnoxious Fatboy '07 exhaust
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Stage IV
Joined: Feb 2008
Posts: 4
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Obnoxious Fatboy '07 exhaust
First post, please bear with a newbie to this forum 
I bought a 2007 Fatboy brand new about a year ago ... IT'S AWESOME !!! I already changed the airfilter to the Arlen Ness Big Sucker, ThunderMax EFI plus the O2 sensor kit and a set of Vance&Hines Big Shots without the silencer.
Result, about 25% more power on the dyno and totally obnoxious exhaust sound, so much, I keep setting off car alarms everywhere I go - I use it even to commute to work in Central Tokyo, so ... as much as I love it, I am looking to lessen the sound level without sacrificing my performance gains
Any recommendations on more "healthy sounding" exhausts, I don't believe the silencer (4db) for the big shots will make that much of a difference ? Is there a website I don't know of, where I can compare sounds ?
My local dealership is forbidden by law to manipulate anything in regards to the exhaust, and the custom shop who helped me so far isn't so helpful (guess they want to capitalize on my trial and error) ...
I bought a 2007 Fatboy brand new about a year ago ... IT'S AWESOME !!! I already changed the airfilter to the Arlen Ness Big Sucker, ThunderMax EFI plus the O2 sensor kit and a set of Vance&Hines Big Shots without the silencer.
Result, about 25% more power on the dyno and totally obnoxious exhaust sound, so much, I keep setting off car alarms everywhere I go - I use it even to commute to work in Central Tokyo, so ... as much as I love it, I am looking to lessen the sound level without sacrificing my performance gains
Any recommendations on more "healthy sounding" exhausts, I don't believe the silencer (4db) for the big shots will make that much of a difference ? Is there a website I don't know of, where I can compare sounds ?
My local dealership is forbidden by law to manipulate anything in regards to the exhaust, and the custom shop who helped me so far isn't so helpful (guess they want to capitalize on my trial and error) ...
Outstanding HDF Member
Joined: Jun 2007
Posts: 2,163
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From: Franklin, TN
RE: Obnoxious Fatboy '07 exhaust
You mean you got a set of V&H's without the baffles? They must have been used. You can go on Eastern Performance (a sponsor on this forum) and order a set of Quite Baffles and install them yourself.
Good luck & welcome to the forum,
Marsh
Good luck & welcome to the forum,
Marsh
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Stage IV
Joined: Feb 2008
Posts: 4
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RE: Obnoxious Fatboy '07 exhaust
They were new, the shop that installed them was incompetent I guess they also installed a faulty EFI module, I had another guy replace for me
Will the baffle really do that much ? I mean, 2-3db sounds like a very very little difference
they also installed a faulty EFI module, I had another guy replace for meWill the baffle really do that much ? I mean, 2-3db sounds like a very very little difference
Advanced
Joined: Sep 2007
Posts: 61
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From: Quad Cities, IL
RE: Obnoxious Fatboy '07 exhaust
I believe it's a 2-3 db difference between the quiet baffle and the stock baffle. If you don't have any baffles at all then there should be a huge difference.
I hope so at least, I just ordered the V&H BSS with the Quiet baffles to go with my new Thundermax with autotune and Arlen Ness Big Sucker Stage II.
I hope so at least, I just ordered the V&H BSS with the Quiet baffles to go with my new Thundermax with autotune and Arlen Ness Big Sucker Stage II.
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Novice
Joined: Jul 2006
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From:
RE: Obnoxious Fatboy '07 exhaust
Bear in mind that the db scale is exponention - 3db is a lot!!!
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Joined: Apr 2007
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From: Sydney
RE: Obnoxious Fatboy '07 exhaust
Hello and Welcome,
I have a similar set up, with BSS and Quite Baffles. I was curious as to the difference on the stock exhaust and the BSS quite baffles. Here is what I found:
Standard Harley pipes at idle 90db
V&H BSS quite Baffles at idle 93db
This is by no means a scientific comparison, but it is what I found on my change of pipes.
BTW I love the sound when the throttle is cranked open!!
I have a similar set up, with BSS and Quite Baffles. I was curious as to the difference on the stock exhaust and the BSS quite baffles. Here is what I found:
Standard Harley pipes at idle 90db
V&H BSS quite Baffles at idle 93db
This is by no means a scientific comparison, but it is what I found on my change of pipes.
BTW I love the sound when the throttle is cranked open!!