salemetro

iTrader: (5)

HELP! I just recently fired up my newly-completed t-76 fed 5.3 project, and the exhaust sounds like an old POS Ford pickup(with crappy glass packs)!

I used 3" stainless that goes over the rear axle and splits into 2 three-inch Spintechs. It sounds good, until it's under load....then it just gets rude sounding. I'll try to post a video here later to help illustrate what I'm talking about. I just ordered a Vibrant 3" "ultra quiet" resonator, and am hoping that this will help mellow it out a little.

So, I'm wondering what types of exhaust setups have been used on single-turbo cars that will keep the tone more tolerable without causing too much restriction for a car that is aiming for 15psi. Any ideas??

Update: added video link...

http://www.youtube.com/watch?v=rLCilTCV0qw

kmracer

iTrader: (1)

your problem is the chambered mufflers.. get rid of them. not only do they sound like ****, they're holding back your combo even with 2.

turbo iroc

iTrader: (1)

Most ls motors are raspy sounding but I can imagine yours. Sounds like cherry bomb mufflers right? I hate that sound as well. I'm running the adjustable borla exhaust with the plates with different sized holes to bypass the muffler and control the sound. I have it all going thru the muffler. Prrs like a kitten, smooth mellow tone cruising, no resonance whatsoever. Its kind of restrictive that way tho and one tail pipe does nothing at all. BUT I have an electric exhaust cutout up front under the passenger floor. Best of both worlds, sleeper quiet or drag race open headers!

salemetro

iTrader: (5)

Suggestions then?? I thought that all mufflers were "chambered", other than glasspacks/resonators? Kinda pisses me off that I spent so much on having these built, only to find that for some reason they sound like crap on my car. I've heard other cars (N/A) that sounded pretty damned good....so I'm kinda at a loss here.

See updated first post for video link....

turbo iroc

iTrader: (1)

Borla or magnaflow sound the best imo.

skyhighsami

iTrader: (8)

Magnaflow or Borla. Or add a glasspac/resonator

salemetro

iTrader: (5)

I ordered a resonator from Vibrant Tech yesterday...I guess I'll wait and see how it sounds after that.

kmracer

iTrader: (1)

you need to remove the chambered mufflers, period. things are entirely different with a turbo setup. you really only need a small muffler with a turbo setup anyways, and it needs to be straight through. run it with no mufflers and you'll see what i mean.

salemetro

iTrader: (5)

Actually, I ordered 2 resonators (one for another project). Do you think that I'd be better-off replacing the spintechs with resonators? If not, what style of mufflers do you think would work best? People have mentioned Borla and a few others....but aren't those chambered as well? I just want to be done with this problem.

Thanks for the input.

kmracer

iTrader: (1)

a single 18" resonator should be fine, or even the 12" if thats what you ordered. if its too loud, just weld in another.

Nitroused383

iTrader: (10)

Dynomax ultra flow, magnaflow race mufflers, hooker maxflow, dynatech or borla xr-1. Lots of mustang guys like dynomax ultra flow ss mufflers. That vibrant resonator won't do much.

HydroStream6

iTrader: (16)

I have a full 3" exhaust after my turbo and the only thing quieting it is a 3" resonator. Sounds perfect. I ran it without the resonator at first, and while it sounded great at idle, it popped and rasped like hell soon as I got over 2200.

xcoldricex

iTrader: (2)

please post vids after you add the resonator, would like to hear how it changes the sound

tripblackls1

iTrader: (11)

so far i really like the sound of my car with single 4" dynatech spiltflow

98Z28CobraKiller

iTrader: (17)

Here's my setup from the back. It's a mandrel 4" with a 4" MagnaFlow then over the axle and capped as seen in the completed picture below. It "T"s of 3" thru a 3" Borla XR1 and out the drivers side. VERY Quiet. I have run 9.31 in the 1/4 with it capped on 17 psi.





The pump has been relocated.

slow00gt

iTrader: (2)

Im running single 3.5 mandrel bent from turbo back with a 3.5 dynomax bullet. Doesnt sound too bad