So here's the history. I ripped out my resonated tips (duals) for a dumped flowmaster 40 series. I wasn't happy with the sound (too quiet), I let it "break in", never got close to what I wanted. So since I got the muffler for cheap I decided to rip the thing open and take some stuff out.

This is what I started with:



I made the cut shown below:



Then removed the triangle fin from the middle:



My understanding was that the piece helped to quiet the exhaust......don't ask why, I just figured if it was a hollow case, it would be louder.

I then welded it back together:



The results:

Still sounds bad.

So that was the first attempt. I then proceeded to straight pipe into a turndown, basically just remove the muffler and put a turndown a few inches from the flange. Still sounds like crap.....thing is I like the sound that comes from the flange directly, I just want to tone it down a bit by routing the end of the pipe more towards the rear; but apparently a turndown COMPLETELY changes the sound of the exhaust.

I have a wedding to attend to tomorrow.....sunday I'm welding the resonated duals back on. The search for the right sound continues....I have a couple more ideas.

-Levino

 

can you get some sound clips of the straight pipe?

 

You should try a SI/DO 40 series, its louder than the SO version and has more rumble to it, not as mellow..

 

SI/DO has more of what your looking for. Flowmaster engineers the inside for the best sounding set up, i can gurantee they have already done what you did except they test run them to make sure it stays at a good level with no "rice" sound

 

I got a video of the sraight pipe, but I have to convert it before I can upload it......and I need MY computer for that, so I'll get the video up hopefully late tonight.


-Levino

 

interesting post man, good work too! Can't say i ever seen anyone experiment with a muffler like that.

Hope you can find the sound your looking for soon! -Mike-

 

Here's the video, it's 101 mb so be aware. I'll try to get a streaming one up sometime.

http://www.prism.gatech.edu/~gtg135t/NoMuffler.zip

I know what I want now. I want the straight pipe like in the vid for low rpms and idle, then when the rpms increaseI want the amount of muffling to increase. I already installed the resonated tips, if I can't find a way to get the sound I want, I'm just gonna swap a 302 a few years down the road, lol.

-Levino

EDIT: 12 mb version: http://vids.myspace.com/index.cfm?fu...=990630965&n=2

 

To clear things up, this is a pic of the setup in the video:



-Levino

 

man you should run a muffer cuz before i installed my new exhaust 2 weeks ago, i started my truck up with the muffler off and the engine would not idel correctly, it would jump from 500-1,000rpm.

 

I ran without the muffler for a week straight......absolutely no problems. Only downside was that highway driving got annoying, hence the high rpm muffling I would like.

-Levino

 

Here's the 12 mb video:

http://vids.myspace.com/index.cfm?fu...=990630965&n=2

-Levino

 

It's not a complete system, of course it wont sound good. Im happy with my setup, a Y-pipe after the cat and split into straight duals with no muffler. If you get a complete system from the cat back it will sound totally different.

 

i dont think a 3.0 will sound good....i believe that you have high expectations for something that cant happen.....you cant expect it to sound like a v8 because it will not!

 

Oh I know it won't sound like a V8, but it CAN sound a certain way........it's really hard to explain the sound I'm looking for. It's possible because it sounds that way straight piped idle, but it gets raspy in the 4-5000 rpms.

-Levino

 

Like I said, get big complete pipes ran back with some big tips, you wont be dissapointed. Here is a sound clip of mine. http://videos.streetfire.net/video/4...8ca5e0d719.htm

 

What size pipes and tips are you running?

-Levino

 

2.5" pipes with 3.5" tips.

 

that doesnt sound to bad. i think it would get anoying after a while.

 

Doesnt bother me any, its only real loud if your getting on it.

 

Here is mine. I am running 2in pipes into 3 or 3.5 in tips. I need to check the width of my pipes again.

 

heres my Flow 40

bottom of SIG....