[GreaseMonkey2000]

I have been looking to do another custom exhaust and want it as deep as possible, decent amount of pops/burbles and not be too loud.

So more research, only found one really good article thus far(will add more as i find them) but thought starting a thread to consolidate such information would be useful to the community.


Muffler design and sound absorption
http://www.dragzine.com/tech-storie...ffler-design-and-sound-absorption-strategies/


Mufflers vs resonators
https://www.cjponyparts.com/resources/mufflers-vs-resonators
https://www.americanmuscle.com/mustang-mufflers-and-resonators-whats-the-difference.html


Catalytic converter comparison
https://grassrootsmotorsports.com/articles/catalytic-converter-face-/

 

[Bryan]

Have to check this out.

 

[Broketuner]

I'm a huge fan of vibrant products. Currently working on a 3" stainless system for the KWSC NC....if all goes well intend to go titanium later on which they also offer

 

[GreaseMonkey2000]

Have to check this out.

Some good information, imo. I have spent a few hours researching thus far and only have these articles to show for it. :suicide:

I'm a huge fan of vibrant products. Currently working on a 3" stainless system for the KWSC NC....if all goes well intend to go titanium later on which they also offer

Vibrant has a good reputation and may end up using one of their resonators.


My idea was a custom ARTech made 2.5" exhaust with a high flow cat, dual resonators(the pipe after the cat would split and go to two different pipes and a resonator one each one offset to each other, space permitting, like these https://m.ebay.com/itm/2-5-x-12-OAL...-Resonator-Stainless-Steel-1792-/122935261411 ), two SLP loudmouth II bullet mufflers (these: https://m.ebay.com/itm/SLP-Bullet-L...ess-2-5-Inlet-Outlet-PAIR-31063-/172447832616 ) in the rear that would go to dual tips that would be centered and high as possible on the rear bumper going thru a cutout.

Well after reading a few articles (ones above) I decided against the SLP units as mufflers as it would either be too loud or the tone would not being deep enough. So my back up idea is a Magnaflow F Body muffler, https://m.ebay.com/itm/Magnaflow-12...Firebird-2-5-Offset-In-Dual-Out-/272757049176 , with probably a single resonator as the reason for the two offset resonators was due to the previous SLP 'muffler' selection.

This muffler is similar in size to what Abe aka ARTech uses as his standard muffler. Obviously he usually is building a exhaust for a turbo setup and thus ends up being quieter due to the turbo. In my case Misfire is supercharged and the exhaust will be that much louder vs the same setup on a turbo or n/a setup.

It is a fine line for sure as I want it louder than my previous ARTech exhaust, even that setup may have been loud enough(with a supercharger) but the lack of sufficient pops/burbles was disappointing(my previous setup produced pops/burbles but minimal, my current header, stock midpipe and Racing Beat muffler produces more pops/burbles). Unfortunately pops/burbles are directly connected to loudness, that is my understanding at least, short of tuning a tunable ecu to achieve.

 

[Bryan]

I've always been craving a good (ie quiet) center-exit exhaust. Physics being what it is, it's hard to make.

 

[GreaseMonkey2000]

I've always been craving a good (ie quiet) center-exit exhaust. Physics being what it is, it's hard to make.

Problem solved with the above listed F Body muffler or this:

https://vibrantperformance.com/cata...=1838&osCsid=e5769b97d5a9d8dbf33842c2affad0a3

Paired with the biggest resonator, it would probably be as quiet as a OTS Racing Beat muffler. It was the one Abe aka ARTech recommended when I was discussing the setup but I'm afraid it would be too quiet. :suicide:

Found a YouTube video of it on a Pontiac G6, sounds good:

 

[Bryan]

Would it physically fit under the car? Quiet is not a bad thing as long as it's still bigger

 

[Broketuner]

I'll be using the bigger 3" brother to that muffler on my SC'd NC... should be quite than current setup for sure

 

[GreaseMonkey2000]

@Broketuner: Wait your NC is supercharged, Sean? :dunno:


After listening to various sound clips of the Vibrant and Magnaflow mufflers above, the Vibrant seems to be deeper and offer some nice pops/burbles so that will more than likely be the route I go.