Muffler bypass tube
Thread Starter
Intermediate
Joined: Nov 2006
Posts: 33
Likes: 0
From: LaBelle Texas
Muffler bypass tube
I have my driver side muffler out to repair a broken flange weld. I have read where others have installed a a bypass tube between the inlet and outlet pipe of the muffler. I plan to this to my mufflers tomorrow. I want to pick up about 2' of tailpipe on the way home from work this afternoon. What size pipe did you install and how do you like them? I don't want them so loud that I can't hear myself think. I just want a little rumble out of the LS1 when I give it the gas. I can do my own fabricating and welding. What do ya'll think?
Le Mans Master
Joined: Jun 2004
Posts: 6,269
Likes: 50
From: Dallas Texas
St. Jude Donor '06-'07-'09-'10
I'd put the muffler and pipe back on a tack it in place first to make sure everything lined up.
Installing the a bypass pipe is what's called the A&A Mod. for the Forum Vendor who first introduced it and a piece of 1 3/4" or 2" SS pipe will work. I had it done awhile back and it gives a deeper sound, but you'll probably be looking for something more later.
Installing the a bypass pipe is what's called the A&A Mod. for the Forum Vendor who first introduced it and a piece of 1 3/4" or 2" SS pipe will work. I had it done awhile back and it gives a deeper sound, but you'll probably be looking for something more later.
Team Owner
Joined: Feb 2000
Posts: 51,504
Likes: 6
From: Sacramento CA
I did this to hold me over until I decided on my final exhaust system.
This mod gives you two very different sounds, from inside and out.
From inside, it's a good amount louder. A little higher octave than aftermarket exhausts, and fairly loud. No resonance or drone of course. I'd give the inside sound a B+, definitely an improvement.
From the outside; however...
The right word for the sound it makes at low rpm/idle would be 'embarrassing.'
It almost sounds like a diesel truck, sped up a little, and higher octave. In fact, it sounds very much like a tractor. Not the exhaust note of a tractor, but the engine sound, if that makes sense. The sound as if you were standing next to the engine.
Revved up, it sounds like stock but louder.
I wish I had a chance to record it before I tossed it for my Corsa TIs.
Let me tell you a short story. Right after getting it done, I took it to a friend's house because I wanted him to rev it up so I could hear it outside.
As I pulled up, he said "There's something wrong with your car!" And every chance he's had, he's ripped me on the sound it made since.
This mod gives you two very different sounds, from inside and out.
From inside, it's a good amount louder. A little higher octave than aftermarket exhausts, and fairly loud. No resonance or drone of course. I'd give the inside sound a B+, definitely an improvement.
From the outside; however...
The right word for the sound it makes at low rpm/idle would be 'embarrassing.'
It almost sounds like a diesel truck, sped up a little, and higher octave. In fact, it sounds very much like a tractor. Not the exhaust note of a tractor, but the engine sound, if that makes sense. The sound as if you were standing next to the engine.
Revved up, it sounds like stock but louder.
I wish I had a chance to record it before I tossed it for my Corsa TIs.
Let me tell you a short story. Right after getting it done, I took it to a friend's house because I wanted him to rev it up so I could hear it outside.
As I pulled up, he said "There's something wrong with your car!" And every chance he's had, he's ripped me on the sound it made since.
Last edited by Kale; Nov 16, 2006 at 10:40 AM.
Instructor
Joined: Oct 2000
Posts: 244
Likes: 0
From: Youngsville,LA,USA La
Love the sound
Did the muffler by-pass a few weeks back and love the sound. Not to loud, so you can have a conversation in the cabin and a nice tone a rev. or WOT. Broke out the blow torch and welding machine, and had a few hours of quality time with my baby. It is a cheap mod. with good results IMHO.
Le Mans Master
Joined: Dec 2003
Posts: 5,561
Likes: 448
From: Atlanta metro Ga.
Originally Posted by 93vetteguy
Did the muffler by-pass a few weeks back and love the sound. Not to loud, so you can have a conversation in the cabin and a nice tone a rev. or WOT. Broke out the blow torch and welding machine, and had a few hours of quality time with my baby. It is a cheap mod. with good results IMHO.
I'm thinking maybe if you didn’t make a smooth hole or made the hole smaller in diameter than the tube, you might end up with the negative results on idle. Could you post a short video or could clip so we can hear it at idle and revving?
I can host it for you, just email it to me. Thanks!
Last edited by Dan_the_C5_Man; Nov 16, 2006 at 11:39 AM.
Team Owner
Joined: Feb 2000
Posts: 51,504
Likes: 6
From: Sacramento CA
Mine was less than 2", not sure exact diameter. It was smaller than the rest of the pipes though.
I did just think of one difference, my car is an 04 and therefore has precats, though I'm not sure those little cats would make that difference.
I did just think of one difference, my car is an 04 and therefore has precats, though I'm not sure those little cats would make that difference.
Instructor
Joined: Oct 2000
Posts: 244
Likes: 0
From: Youngsville,LA,USA La
Originally Posted by Dan_the_C5_Man
I intended to do this one as well, but it's a bit of a challenge w/ my Ti pipes. Do you agree with the idle quality described above?
I'm thinking maybe if you didn’t make a smooth hole or make the hole smaller in diameter than the tube, you might end up with the negative results on idle. Could you post a short video or could clip so we can hear it at idle and revving?
I can host it for you, just email it to me. Thanks!
I'm thinking maybe if you didn’t make a smooth hole or make the hole smaller in diameter than the tube, you might end up with the negative results on idle. Could you post a short video or could clip so we can hear it at idle and revving?
I can host it for you, just email it to me. Thanks!
. Did not want to do the same on the C5, with changing the exhaust system mulitple times. I want something to sound more aggressive than my wife Mercedes and her Expedition. I will try to post the sound clip this weekend.
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Le Mans Master
Joined: Dec 2003
Posts: 5,561
Likes: 448
From: Atlanta metro Ga.
Originally Posted by 93vetteguy
Dan, I like the quality of the sound at idle, no tractor sound here, I live in Louisiana I know what a tractor sound like. I tried three different muffler system on my C4, waste of $$$, could not get the right tone for my taste . Did not want to do the same on the C5, with changing the exhaust system mulitple times. I want something to sound more aggressive than my wife Mercedes and her Expedition. I will try to post the sound clip this weekend.
. Did not want to do the same on the C5, with changing the exhaust system mulitple times. I want something to sound more aggressive than my wife Mercedes and her Expedition. I will try to post the sound clip this weekend.
