My setup runs a 2.5" downpipe to a 3" custom exhuast; if I had a 14" long -roundbodied (20" overall) Magnaflow muffler after the downpipe and then an additional oval Magnaflow muffler (3" I/O) at the back of the car, will this thing be pretty quiet? Any ideas how to get it quiet otherwise without dampening airflow/top-end?
"Vroom."
"Yo I wouldn't race him, there's not even an interior in his car man."
"Vrooooooom PSSSSHHH!"
"Oh sh*t. F*ck that, dude..."
so let me get this straight... you want TWO mufflers in the system? why not just install ONE
quiet muffler and be done with it?
Trailer Queen corvette wanna-be with 40 coats of wax and powdercoating that soaks in.
Dynomax superturbo.../Thread
Seriously though I ditched my megan cannon muffler for it, quiet as hell until the open dump wg opens hah. I also have a 12" dynomax bullet muffler for a short res. Got a 30" glasspack sitting around but I dont think I want it that quiet, just changing mufflers was enough for me.
So are ya'll saying go with JUST the Dynomax superturbo muffler and ditch the magnaflow mid-pipe one bein used as a res? BTW I'm also running catless.
"Vroom."
"Yo I wouldn't race him, there's not even an interior in his car man."
"Vrooooooom PSSSSHHH!"
"Oh sh*t. F*ck that, dude..."
2.5" downpipe- 12 to18" resonator, 3" piping, 3" dynomax superturbo
You wont be dissapointed, trust me.
Hey as long as it's pretty quiet while driving I'm happy, but when the open dump opens its game on! Hey you got a link for that Dynomax?
"Vroom."
"Yo I wouldn't race him, there's not even an interior in his car man."
"Vrooooooom PSSSSHHH!"
"Oh sh*t. F*ck that, dude..."
Found it for $117.41 from streetsideauto.com. 3" C/C Is that a decent deal?
"Vroom."
"Yo I wouldn't race him, there's not even an interior in his car man."
"Vrooooooom PSSSSHHH!"
"Oh sh*t. F*ck that, dude..."
I paid like $40 for mine on ebay lol. Im sure even like summit and jegs have it cheaper than that. Make sure you look forthe superturbo, not one of the ultraflow welded mufflers or whatever.
Oh I know, I have the PN (#17673) for the one I want no worries. Let's see how cheap I can find one!
"Vroom."
"Yo I wouldn't race him, there's not even an interior in his car man."
"Vrooooooom PSSSSHHH!"
"Oh sh*t. F*ck that, dude..."
Okay Jegs want's $140 for it, but found it on eBay for $69.95 +s&h from Summit's eBay store. Probably go with eBay. lol
"Vroom."
"Yo I wouldn't race him, there's not even an interior in his car man."
"Vrooooooom PSSSSHHH!"
"Oh sh*t. F*ck that, dude..."
Paid $40 from Advanced Auto for my 2.5/2.5 CC...
No cat, with open muffler. It will only be loud when you are on it.
FU Tuning
Not a Expert per Bill Hahn Jr. wrote:No cat, with open muffler. It will only be loud when you are on it.
Um that's basically open downpipe. And it will be loud. I can't stand it. I open my exhaust cutout every once in a while for fun, but I would not be able to take the drone.
z yaaaa wrote:so let me get this straight... you want TWO mufflers in the system? why not just install ONE quiet muffler and be done with it?
Because, my Magnaflow straight through 18" long 4" canister muffler in front of the Camaro style Dynomax Super Turbo makes my exhaust super quiet yet still high flow. It sounds better (far quieter) than the Dynomax alone.
2001 Olds Alero (LD9)
650 whp / 543 ft-lb
@turboalero
z yaaaa wrote:so let me get this straight... you want TWO mufflers in the system? why not just install ONE quiet muffler and be done with it?
The14" round muffler is more of a resonator than a muffler. I know because I have two of them on my car.They deepend the tone quite a bit but did make the car noticeably quieter each time.
I have a 3" turbo back exhaust with 2 of the 14" magnaflow resonators you listed. The car sounds great. I think it is honestly as quiet as you can go without really hindering performance. I did both of mine between the where the cat was. If you did it that way you could still fit another one at the rear where the muffler goes if you wanted it even quieter.
FORGET GIRLS GONE WILD WE HAVE GOVERNMENT SPENDING GONE WILD!
from what i have been reading about magnaflow mufflers it seems as though the straight through designs have sound absorbing material inside them sometimes a steel mesh or a second perforated core inside area. not just one perforated core section like a resonator. furthermore a 'glass pack' isnt the same as a resonator either in that it uses fiberglass to deaden the sound as well as a perforated core section.
i would love to see it
proven that adding a resonator does absolutely nothing to hinder flow. on paper yes, obviously it isnt going to mean much, however, you are still slowing down the exhaust gases while they move throughout the perforated core.
100% serious here. i would actually like to see some science on the subject.
as far as i am concerned by adding two of these magnaflow straight through mufflers you essentially would be hurting flow more so than you would with say adding one resonator INSTEAD of said magnaflow straight through.
either way, i say do what you want. getting a quiet exhaust that flows well would be the best but IMO a cut-out would be next best with one nice quiet muffler out back.
Edited 4 time(s). Last edited Sunday, December 27, 2009 5:18 PM
Trailer Queen corvette wanna-be with 40 coats of wax and powdercoating that soaks in.
z yaaaa wrote:from what i have been reading about magnaflow mufflers it seems as though the straight through designs have sound absorbing material inside them sometimes a steel mesh or a second perforated core inside area. not just one perforated core section like a resonator. furthermore a 'glass pack' isnt the same as a resonator either in that it uses fiberglass to deaden the sound as well as a perforated core section.
i would love to see it proven that adding a resonator does absolutely nothing to hinder flow. on paper yes, obviously it isnt going to mean much, however, you are still slowing down the exhaust gases while they move throughout the perforated core.
100% serious here. i would actually like to see some science on the subject.
as far as i am concerned by adding two of these magnaflow straight through mufflers you essentially would be hurting flow more so than you would with say adding one resonator INSTEAD of said magnaflow straight through.
either way, i say do what you want. getting a quiet exhaust that flows well would be the best but IMO a cut-out would be next best with one nice quiet muffler out back.
We have beat this dead horse over and over and over again. Of course a straight pipe is better because any resonator, glasspack, muffler, ect is going to cause some turbulance in the airflow. We are talking about a 3" straight through pipe here though. It is not likely to even make a difference that can be accuratly picked up by a dyno. The bigger concern would be the added weight. When you mofd there is always a trade off. Both myself and the OP were willing to trade off less weight for a better sounding, quieter exhaust.
FORGET GIRLS GONE WILD WE HAVE GOVERNMENT SPENDING GONE WILD!
i got a turbo thrush muffler from advance for like 30 dollars its only a tad bit louder than stock and i love the sound of it it gets so many compliments
Quote:
Um that's basically open downpipe. And it will be loud. I can't stand it. I open my exhaust cutout every once in a while for fun, but I would not be able to take the drone.
That is no where near like open downpipe. My 96 turbo car has this and is no where near as loud as my 01 Supercharged car.
FU Tuning
Wow, so much more response and input than I expected; I love it. I think I am going to go with a Magnaflow 14" straight through muffler right after the downpipe then follow up with the Dynomax Super Turbo muffler in the back. To me that's quiet enough while still keeping a balance between weight, performance, and sound. Plus with the Dynomax muffler in the back, it'll look relatively stock when the car's off except for the 3" exit. Remember, this car is meant to be a sleeper at first glance.
"Vroom."
"Yo I wouldn't race him, there's not even an interior in his car man."
"Vrooooooom PSSSSHHH!"
"Oh sh*t. F*ck that, dude..."
Turbo, 2.5" DP, 3" mandrel bent Ext, Dynomax side in side out muffler,
really quiet, until the WG opens... then its fun.
Side in side out is the quieter dynomax.
Turbo lags out about 200-300 RPM higher.
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
You've heard this setup on an ECO?
"Vroom."
"Yo I wouldn't race him, there's not even an interior in his car man."
"Vrooooooom PSSSSHHH!"
"Oh sh*t. F*ck that, dude..."
Eco, ld9..doesnt matter sound wont be much different unless you had cams and other factors that would change the tone.
I love how quiet the dynomax is, just wish it had a deeper sound. I love how greddy mufflers sound, if I go back to a cannon style muffler it will only be a greddy ti, or Id love to try out an apexi ws2. With these I would have to put in a longer resonator.
Coming from a person that has had stock, glass packs, Dynomax ST, Walker's Quietflow for mufflers. And my mission was to get as near stock sound level as possible, with better flow characteristics and larger diameter.
These mufflers has the best results.
I added a SS magnaflow straight through muffler for a resonator, and what it did was give it a slight bassier note.
I tell you that the engine is louder then the mufflers, and I all hear is engine note, and not a annoying sounding 4cyl drone that the others gave.
Here is an old thread of my experience.
http://www.j-body.org/forums/read.php?f=2&i=348360&t=348360#348360
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-----The orginal Mr.Goodwrench on the JBO since 11/99-----
i like the two mufflers idea haha
My car may run 18s, but I can do your taxes in 10 seconds flat.
JBO lube - they would never have enough in stock and we'd never see RodimusPrime again
z yaaaa wrote:from what i have been reading about magnaflow mufflers it seems as though the straight through designs have sound absorbing material inside them sometimes a steel mesh or a second perforated core inside area. not just one perforated core section like a resonator. furthermore a 'glass pack' isnt the same as a resonator either in that it uses fiberglass to deaden the sound as well as a perforated core section.
i would love to see it proven that adding a resonator does absolutely nothing to hinder flow. on paper yes, obviously it isnt going to mean much, however, you are still slowing down the exhaust gases while they move throughout the perforated core.
100% serious here. i would actually like to see some science on the subject.
as far as i am concerned by adding two of these magnaflow straight through mufflers you essentially would be hurting flow more so than you would with say adding one resonator INSTEAD of said magnaflow straight through.
either way, i say do what you want. getting a quiet exhaust that flows well would be the best but IMO a cut-out would be next best with one nice quiet muffler out back.
If you want Science on the subject then do the research like everyone has:
With exhaust flow its not just about flow, or improving it.
A 3 in. sized pipe will flow better then a 2 in. pipe, but you may lose a few ponies in the bottom/mid range of your power band.
Running that size pipe on a 4cyl. car may not be the best way to get max power out of a exhaust mod:
Heat is a key factor in exhaust flow and scav.; the hotter you get the gasses the faster it will flow and the faster it will move.
Too large a pipe doesn't allow the best scav. effect, but in the top end the flow versus heat factor is match by the engine breathing better.
This means better top end power for WOT, but slower stop and go speeds.
Now for the glasspacks I think you may have a miss-understanding on how they work:
The perforated core is filled with a packing that absorbs the sounds given off from the exhaust bouncing off the perforations, it doesn't go through the holes and back out.
The perforated core also heats up faster then the pipe its self, again more heat faster flow.
Also for the dual core muffler system allows the max flow while getting the best sound quality. With most glasspacks you have to force alot of exhaust gas through them for you to see a diffrence in sound (like heavy accle. and WOT)
the dual core allows lower flow rates to bounce off the perferated cores at much lower pressure rates and still allow max flow.
And adding two mufflers doesn't hurt flow as long as you allow better flow then a single system (2 1/2 inch single vs 2 inch dual)
Just to finish it off you should check out Import Tuners Tech pages online and see the test they did on exhaust flow and the diffrent systems and how they affect power bands.
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