I know this topic has been beaten to death, but I need advice/experience. Stock M62 kit is installed on my car, along with an L61 pacesetter header, 2.5" pipe, two resonators, catless, and a magnaflow muffler (18" long oval i think). The exhaust sounded ok n/a. It was deep and mellow, just enough to know it was there, and not raspy. Since the blower install, WOT has become almost sickening. It's crazy loud and raspy at WOT, even with two resonators. I'm thinking i need to go with a quieter muffler, but need suggestions from experience on what will quiet it down. The other option is a second bullet style muffler where the cat should be. I'm sure being catless doesn't help, but it's a tradeoff for the performance gain on a boosted app.
I know i can't have it both ways - going with a super quiet restrictive muffler vs a straight through is a minor performance tradeoff, but this is a daily driver, and i was hoping to keep it somewhat quiet.
So, "quiet" m62 ecotecs, what are you running muffler/exhaust wise?
I have a cobalt SS muffler on my daily driver. its 2.5" in and out and supposedly was proven to make just as much power as a magnaflow turbo muffler. Its pretty darned quiet, im sure with the m62 it would have a nice low growl.
I'm a turbo'd ecotec, I ran a 28" Thrush Resonator, to a 2.5" Dynomax Super Turbo, reallllly quiet and fun sleeper style
I'll have to check out the stock SS muffler. Should certainly be easy to come by.
SLOCAV - turbos are a totally different beast. They just sound sexy, and it's hard to make them sound otherwise. The s/c seems to make the exhaust raspy.
I would think it would keep it quiet even on a s/c car, that long reso I have in there really shut my car up
I'mnot a ecotec, but a charger setup. I have no cat, but a resonator. I use to have a round style straight through muffler. Got tired of how loud it was. I bought a more oval/ traditional style muffle, still straight through, but has more inside volume. It also has a removeable resonator in the exaust tip. This made a hugh difference. You might want to look into that.
FU Tuning
Rare5spd has a very quiet exhaust setup on his m62 cav, he used the stock muffler off of a mustang gt500, I'm actually thinking of throwing on the other muffler to see if I like it on my car with just a magnaflow res and no cat. Otherwise I'm going to ditch my Edelbrock muffler and pickup a 60 series or super 50 Flowmaster like I had on my ohv Cav.
Edited 1 time(s). Last edited Thursday, April 28, 2011 11:26 AM
oldskool wrote:I'll have to check out the stock SS muffler. Should certainly be easy to come by.
SLOCAV - turbos are a totally different beast. They just sound sexy, and it's hard to make them sound otherwise. The s/c seems to make the exhaust raspy.
i will have a stock SS muffler possibly soon..im looking into cat-back exhausts for my cobalt, only thing is im looking to sell the whole stock cat-back, to kind of recouperate some of the money of an aftermarket cat-back
JUCNBST wrote:Rare5spd has a very quiet exhaust setup on his m62 cav, he used the stock muffler off of a mustang gt500, I'm actually thinking of throwing on the other muffler to see if I like it on my car with just a magnaflow res and no cat. Otherwise I'm going to ditch my Edelbrock muffler and pickup a 60 series or super 50 Flowmaster like I had on my ohv Cav.
Yes sir. Nice quiet Idle and when you get on it. Your attention is brought more to the whine than the exhaust. It has a nice low mellow tone upon WOT. I do have a vibrant cat and a 30" cherry bomb on the car which helps alot. Jeff, I will bring you that muffler to the meet.
Save your money. It might be worth something someday.
Thats if I'm at the meet......got to get the cav drivable. I'll text ya in a bit
stock mustang gt 500 huh? I guess i need to join a mustang forum and try to find one for sale
Is that 2.5" in/out?
run a stock muffler and get a cutout for performance.
All the cobalt guys are switching to dynomax super turbo or stainless works because of the noise
1989 Turbo Trans Am #82, 2007 Cobalt SS G85
Yep 2.5 in and out, iirc it's offset inlet/center outlet with stainless tip welded onto outlet.
Dynomax super turbo ftw
z28guy(KGM BEOTCH)
My guess is that a stock newer v8 mustangs have the same muffler, but im not too sure. Theres some on ebay I just saw.
Save your money. It might be worth something someday.
My thermal r&d on a m45 is quite.
Rodimus Prime wrote:All the cobalt guys are switching to dynomax super turbo or stainless works because of the noise
stainless works are crap , my 3" muffler neck down to 2 1/2" and are robbing about 50whp from my street/drag toy , both the 3 pass and straight through neck down
my concern was the dynomax might not flow as well
1989 Turbo Trans Am #82, 2007 Cobalt SS G85
I'm looking at putting either a moroso spiral flow or vibrant ultra quiet resonator in place of the cat frame. Both are purported to really quiet things down adding very marginal back pressure. Anyone have experience with either of these lines? When searching youtube, it seems to be a mixed bag, and neither seems to be a cure-all especially if an ass-can style muffler is used.
Although the gt500 mufflers are pretty cheap on ebay, they look like the shop would have to do more rework due to the offsets and length = more labor cost, so that's a last resort.
what length muffler though? will a 26 inch muffler fit back there? or does it have to the shoter 18.5 inch one?
EvoFire wrote:what length muffler though? will a 26 inch muffler fit back there? or does it have to the shoter 18.5 inch one?
It should fit. I have a 18" Superturbo, and there's a little room to spare on both ends.
you would want to go as big as you can, the bigger the better the flow, and more sound cancelling abilities
1989 Turbo Trans Am #82, 2007 Cobalt SS G85
I have similar set up as you have,and it was raspy as hell,I ended up running a 28 inch long magnaflow muffler/resonator,Way better now,but still right at 3000 rpm to about 3500 there is still a raspy noise but goes away after that.But may have to look into a different muffler,I am thinking of going Borla.
