Big Radius pipes.
Tourer
Joined: Feb 2007
Posts: 446
Likes: 0
From: South of the cities, MN
RE: Big Radius pipes.
In my opinion the baffles would pass as "mufflers" look in the end of the pipe and you can see some attempt at restricting the exhaust flow.
I just pulled the baffles out and cut the front end of the baffle and bent the pieces inward so the internal end of the baffle looked like a cone. I reduced the opening of the baffle by about 1/2. Put them back in and there is a noticable difference. they are a little quieter, didnt seem to effect performance at all.
I just pulled the baffles out and cut the front end of the baffle and bent the pieces inward so the internal end of the baffle looked like a cone. I reduced the opening of the baffle by about 1/2. Put them back in and there is a noticable difference. they are a little quieter, didnt seem to effect performance at all.
Tourer
Joined: Mar 2007
Posts: 372
Likes: 0
From: Marysville, WA
RE: Big Radius pipes.
Leave the baffles in, they sound great......have a listen.http://www.youtube.com/watch?v=IBZRNIWRGZs
Elite HDF Member
Joined: Oct 2005
Posts: 4,955
Likes: 1
From:
RE: Big Radius pipes.
ORIGINAL: Crazy Biker
You will lose torque with no baffles. You need that back pressure.
You will lose torque with no baffles. You need that back pressure.
Take them out and you are going to need at least $800 bucks of "chipping", "Dyno testing" etc...
They sound great with the baffles!!
Outstanding HDF Member
Joined: Oct 2005
Posts: 2,035
Likes: 5
From: near Buffalo, NY
RE: Big Radius pipes.
ORIGINAL: okiehogg
Stupid question, but are the baffles considered mufflers? I know my state requires muffles, but not sure if it has to be a "visible" muffler.
Stupid question, but are the baffles considered mufflers? I know my state requires muffles, but not sure if it has to be a "visible" muffler.
The enemy of a free flowing, unbaffled pipe is reversion. Reversion is where exhaust actually gets sucked back in to the combustion chamber before the valve closes, thus robbing the new gas charge of oxygen and fresh gasoline to burn. Without oxygen & gas, there is no burn, and that kills power.
A baffle increases backpressure slightly, but more importantly, the backpressure helps with reversion.
Take your baffles out and you'll see a dramatic drop in power because your combustion chamber is being refilled with exhaust..
There are a lot of cutsie exhaust pipes out there. Most don't have any baffling. Look great, run like $hit.
Pick a system like V&H, Hooker, Samson or any other performance baffled pipe to get the power that you should get with an exhaust change.
Tourer
Joined: Sep 2006
Posts: 280
Likes: 0
From: Surprise, AZ
RE: Big Radius pipes.
I bought a set for my Fat Boy when they were just released so I had never heard them before. Got done installing them in the garage around 10pm and, of course, I wanted to hear how it sounded. So I closed the garage door in our incredibly quiet neigborhood so not to disturb the neighbors and started it up...
[sm=jawdrop.gif]
Leave the baffles in.
[sm=jawdrop.gif]
Leave the baffles in.
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