scubaman15
Well-Known Member
Has anyone Modifed a stock pipe ...and if so what were the results ?
STOCK Exhaust?
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mudslinger
Banned
Skully posted this.
http://www.bigdogbiker.com/forums/customizing/1499-build-your-pipes.html
They look great!
go check it out.
I have modded the baffle but what skully did is cool.
http://www.bigdogbiker.com/forums/customizing/1499-build-your-pipes.html
They look great!
go check it out.
I have modded the baffle but what skully did is cool.
LamboV12
Active Member
Here's the thread on the home made baffle
http://www.bigdogbiker.com/forums/performance/1397-drag-pipes.html
Mud - your up early
http://www.bigdogbiker.com/forums/performance/1397-drag-pipes.html
Mud - your up early
:roll: :roll: :roll:
Black Dawg
Active Member
When I had my stock exhaust I modifed it. If you look inside the muffler you'll see what looks like a 1" plug. Drill those out. It's a weird muffler(s). I can't remember how many plugs, but I think there are either 4 or 8. You'll have to disassemble it and look in each end to know what I'm talking about. The drill bit needs to be about an 1" or 3/4" and as long as possible to reach inside. You might have to find a long enough rod to help punch the plugs out. The sound is a bit louder, but raspy. You'll gain some power, I'm guessing 5hp. The muffler is VERY restrictive and with the plugs drilled out the motor is still trying to force exhaust gases thru some restrictive passages. You'll need to up the intermediate jet to .031 to get you in the ball park.
lee
Well-Known Member
remember though with no baffles you will probably gain top end but can lose a bit at the bottom - wide open pipes are not recommended for typical street use, especially short ones - not saying you're doing away with the baffles altogether but this gives an idea of the possible affects - as Black Dawg says you will need to retune the carb
Modify Stock Muffler With EFI K-9
Does anyone know if the Big Dog EFI system will automatically compensate for any lower back pressure changes caused by a modified stock Supertrapp muffler? I want take a stock muffer and drill out the plugs a little to improve the sound. I don't want it a lot louder, just a little deeper. However, I certainly don't want to do this if it will it will negatively affect the EFI system. Thanks.
Does anyone know if the Big Dog EFI system will automatically compensate for any lower back pressure changes caused by a modified stock Supertrapp muffler? I want take a stock muffer and drill out the plugs a little to improve the sound. I don't want it a lot louder, just a little deeper. However, I certainly don't want to do this if it will it will negatively affect the EFI system. Thanks.
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