Project Valve Technology Muffler
You can always do an e-cutout or boost actuated cut-out. That way you can run the stock cat-back and have stock like quiet. That's what I am doing now, for quite some time actually, and to tell you the truth I almost never open the cutout. I just hate the noise, but of course my cut-out is on the downpipe, so it's very loud. It's a DMH e-cutout, so it opens/closes very fast and is great quality, but you still have to open and close it via a switch whenever you want it, which is good and bad...good that your car is super quiet all the time unless you open it, bad that you don't have the power unless you open it.
A boost actuated cutout may fit your needs a little better. Depending on exactly where you get it welded in, it may not be obnoxiously loud, and it will be automatically triggered from boost. The good side is that you don't have to do anything but get in boost to have the power. The down side is that, depending on where you weld it in, it may be a bit too loud, if it triggers too soon for normal driving. But I'm assuming that you can test different spring settings or maybe restrictors in the boost line to delay opening, etc.
A boost actuated cutout may fit your needs a little better. Depending on exactly where you get it welded in, it may not be obnoxiously loud, and it will be automatically triggered from boost. The good side is that you don't have to do anything but get in boost to have the power. The down side is that, depending on where you weld it in, it may be a bit too loud, if it triggers too soon for normal driving. But I'm assuming that you can test different spring settings or maybe restrictors in the boost line to delay opening, etc.
3" DP -> 3" Magnaflow -> 3" intermediate pipe past rear wheels --> boost-actuated cutout hooked to an MBC with a turn down close to the end of the car behind the stock VIII rear bumper cover --> 3"->2-1/2" reducer --> 2-1/2" restrictive but quiet muffler (maybe a DynoMax Super Turbo muffler).
A lot of trouble and expense though if it doesn't work as hoped...
here is the link to the quiet exhaust on youtube. hopefully the owner can chime in if he is part of the forum
it might be expensive but it could the solution your looking for!
i think i might swap out my JunB.L canister for a magnaflow. we'll see!
http://www.youtube.com/watch?v=GxrvpQCfLCQ
it might be expensive but it could the solution your looking for!
i think i might swap out my JunB.L canister for a magnaflow. we'll see!
http://www.youtube.com/watch?v=GxrvpQCfLCQ
Last edited by vmrevo9; Jun 26, 2010 at 09:24 AM.
^That set-up with the bullet on the test pipe and the Magnaflow in the rear is not that quiet. That is my old set-up. In fact I'm trying to sell the bullet muffler test pipe if any one is interested ($150). My current setup with a Helix cat is equally quiet (but not quiet at all). I had "a word" with a cop about my exhaust when I had the bullet/Magnaflow combo on the car. I'm looking for much quieter than that. It does sound quiet in that video, but in real life with large cams it wasn't quiet at all.
That's similar to what I've been contemplating actually, although I wouldn't want the cut-out to be anywhere other than the rear of the car. I'm contemplating:
3" DP -> 3" Magnaflow -> 3" intermediate pipe past rear wheels --> boost-actuated cutout hooked to an MBC with a turn down close to the end of the car behind the stock VIII rear bumper cover --> 3"->2-1/2" reducer --> 2-1/2" restrictive but quiet muffler (maybe a DynoMax Super Turbo muffler).
A lot of trouble and expense though if it doesn't work as hoped...
3" DP -> 3" Magnaflow -> 3" intermediate pipe past rear wheels --> boost-actuated cutout hooked to an MBC with a turn down close to the end of the car behind the stock VIII rear bumper cover --> 3"->2-1/2" reducer --> 2-1/2" restrictive but quiet muffler (maybe a DynoMax Super Turbo muffler).
A lot of trouble and expense though if it doesn't work as hoped...
Rich, once again we are on the same track. I have that broken QTP dump from James that I plan to hack up and put near the rear of the car. (I'll have to steal the WGA from my Turbo Lamp
) MBC to adjust when it opens and a solenoid (probably a re-used stocker) to enable/disable it. Was even thinking of just running a stock muffler....That would rock if there was room for a small muffler elsewhere under the car coming out of the dump.
gotcha!
^That set-up with the bullet on the test pipe and the Magnaflow in the rear is not that quiet. That is my old set-up. In fact I'm trying to sell the bullet muffler test pipe if any one is interested ($150). My current setup with a Helix cat is equally quiet (but not quiet at all). I had "a word" with a cop about my exhaust when I had the bullet/Magnaflow combo on the car. I'm looking for much quieter than that. It does sound quiet in that video, but in real life with large cams it wasn't quiet at all.
When I dealt with Dynomax warranty people, I got an email address to follow-up. I sent them an email same day recounting our conversation and asking them to reply verifying receipt and that they had shipped a replacement. The next day when I didn't hear anything, I followed up again by email and they replied saying they were shipping that day.
I'm really still a bit ticked that this muffler performed so badly. Not just at Dynomax, but at my car. I had high hopes that this would solve my exhaust noise issues without killing power. I don't know what to do now. Selling the car is on the table as an option...
I'm really still a bit ticked that this muffler performed so badly. Not just at Dynomax, but at my car. I had high hopes that this would solve my exhaust noise issues without killing power. I don't know what to do now. Selling the car is on the table as an option...
Dont sell the car. There is still a way you can make your car pretty quiet. Only doubt I would have is that you have Cam's . Lets assume that cam's wont make too much more difference in sound loudness, if you run 2 magnaflow mufflers it will quiet your car down to still be very enjoyable. Now it wont be stock quiet like the Dynomax did for my car (minus the rattle), but it was very enjoyable to drive with.
Now you already have the Buschur exhaust. Is it a slip fit or flanged? If its slip fit catback and flange downpipe like mine was, all you need is the magnaflow round muffler and a flange to weld on one end.
https://www.evolutionm.net/forums/ev...t-exhaust.html
Idle, rev to 2-2.5k and drive off.
http://s169.photobucket.com/albums/u...t=MOV01355.flv
Normal driving and comparing to sound system.
http://s169.photobucket.com/albums/u...t=MOV01357.flv
WOT 1-2-3
http://s169.photobucket.com/albums/u...t=MOV01358.flv
More normal driving a bit of traffic.
http://s169.photobucket.com/albums/u...t=MOV01359.flv
2-step set at 5750 rpms
http://s169.photobucket.com/albums/u...t=MOV01360.flv
Now key important factors. You currently have the Buschur Mangaflow rear (7" muffler) and Bullet center? Make sure you replace the center bullet with 6" diameter magnaflow muffler. Dont be like the few who ended up putting 4" muffler in the center thinking it will be able to do the job of an 6" . So end result will be 6" round muffler center and 7" muffler rear.
Last edited by BluEVOIX; Jun 27, 2010 at 09:05 AM.
More normal driving a bit of traffic.
http://s169.photobucket.com/albums/u...t=MOV01359.flv
http://s169.photobucket.com/albums/u...t=MOV01359.flv
what are the dimension of the the muffler you have as a cat? i might consider this as a new testpipe. i have a Perrin HFC that i will reinstall once i get back and i'll see how the sound is again. its been awhile since i had it installed.
Not just yet. As long as the new muffler does not rattle on stock cam setup then its the solution for stock quiet 3" setup. I'll update when I get the revised version.
I'm thinking of doing the Magnaflow in the middle. I have a Buschur with a flange, so I'd need to weld two flanges. BluEVOIX, thanks for all your help. Have you determined that a 7" diameter muffler won't fit?
But if you think about it, the difference in diameter on each end between 7" and 6" is only 0.5" .
I hope the dynomax works on a regular camed car. I have a new updated muffler here with no home.
I kind of suspect its a V8 Vrs a 4 cylinder that is the problem. Eight little cylinders providing a constant flow vrs four slightly larger pulses with nulls in between. But maybe the pulses on a normal tuned car will be smooth enough to not make spikes.
I kind of suspect its a V8 Vrs a 4 cylinder that is the problem. Eight little cylinders providing a constant flow vrs four slightly larger pulses with nulls in between. But maybe the pulses on a normal tuned car will be smooth enough to not make spikes.