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Technical Shop => Exhaust => Topic started by: Marksmopar1 on May 03, 2019, 09:44:42 AM

Title: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Marksmopar1 on May 03, 2019, 09:44:42 AM
  Hi,
    This is not a question for those seeking the utmost in originality.

Originally the Ebodies had resonators under the car and mufflers at the rear.
I am curious, running just mufflers under the car eliminating the resonators what could I expect doing this? More noise in the car etc?
   I am not doing this for any other reason than just keeping the exhaust it simple. I see it on other models of cars mufflers only then out the tips. I have found a picture of what I was considering.
  Thoughts, anyone running this set up...pictures Etc?
Thanks
   
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: BIGSHCLUNK on May 03, 2019, 09:49:45 AM
My setup is very close....
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Marksmopar1 on May 03, 2019, 10:05:02 AM
   Nice!
What are you running for mufflers with what engine?
Do you have droning in the car at highway speed, noise level etc?
  What size pipe?

Ya,I have lots of questions .... :)
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: 340challconvert on May 03, 2019, 10:10:07 AM
Pic of the factory set up
How loud is a system like yours with just the front resonators?
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: 340challconvert on May 03, 2019, 10:17:26 AM
Years ago someone added an X crossover pipe to my stock exhaust when I first bought the car in 1979.
Supposed to offer some "flow" advantage? :thinking:
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Chryco Psycho on May 03, 2019, 10:31:18 AM
It really depends which mufflers you are using , some sound great without a second set , Hooker Aero Chambers & most Super Turbo such as dyno max sound great alone , others such a Flowbastard resonate like H3ll
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Marksmopar1 on May 03, 2019, 10:32:57 AM
 Hummm,

Yes nearly the same exact was done to mine. Hemi cars had a H pipe.?
I have mine all apart now, soon to be reassembled. So looking for ideas on exhaust.
   440 U code in mine...
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Claudia on May 03, 2019, 10:44:14 AM
I have no real feedback to offer either way as I haven't put any miles on my car but I do have the same setup which was just installed a couple of weeks ago . . . "X" pipe and mufflers only.  :fingerscrossed:
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Chryco Psycho on May 03, 2019, 10:46:51 AM
The crossover pipes allow the exhaust to take the path of least resistance , I generally always have them in a system .
X pipes are similar & reduce backpressure even more but will change the sound
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: RUNCHARGER on May 03, 2019, 07:30:22 PM
I've done that setup since the 70's, it works great. Factory exhaust is too quiet.
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: BIGSHCLUNK on May 03, 2019, 10:46:50 PM
To answer your question... 426 HEMI w some knockoff Flowmasters (maybe??). Love the sound at the stoplight...   :bradsthumb:   But the drone @ 70 can get annoying.. I keep earplugs hanging from my mirror !  :yes:
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: blown motor on May 04, 2019, 05:17:32 AM
Quote from: BIGSHCLUNK on May 03, 2019, 10:46:50 PM
To answer your question... 426 HEMI w some knockoff Flowmasters (maybe??). Love the sound at the stoplight...   :bradsthumb:   But the drone @ 70 can get annoying.. I keep earplugs hanging from my mirror !  :yes:

I thought those were for your wife.  :))
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Topcat on May 04, 2019, 06:32:35 AM
Fairly Quiet until you get on it.
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Racer57 on May 04, 2019, 06:55:56 AM
I have that set up and like it. A lot less to mess with.
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Marksmopar1 on May 04, 2019, 10:55:08 AM
  TopCat,

I like the set up,, simple looking and functional
What Muffs are those on the rear, inlet+ outlet size?  What size pipes?

This is very clean looking, I think I like this better than muffs under the rear seat with nothing at the rear...
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: RUNCHARGER on May 04, 2019, 11:06:39 AM
It gives better ground clearance and driveshaft clearance. Only thing I don't like is the mufflers are near the gas tank so the heat will transfer easier to the fuel but it's hot under there no matter what.
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Topcat on May 04, 2019, 06:36:01 PM
@Marksmopar1 (https://forum.e-bodies.org/mlist/marksmopar1_2647)

These are Magnaflows stainless steel.

I don't recall the p/n but I will try and see if I can find them.

My system is a 2.5" front to back, no baffles, straight through.

She purrs like a Kitty at 2,500 RPM.
But hit 3,500 RPM hard, and she'll roar like a Lion.
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Topcat on May 04, 2019, 06:38:33 PM
Quote from: RUNCHARGER on May 04, 2019, 11:06:39 AM
It gives better ground clearance and driveshaft clearance. Only thing I don't like is the mufflers are near the gas tank so the heat will transfer easier to the fuel but it's hot under there no matter what.

You'd be surprised.

Today I ran her hard and put my hand on the mufflers 10 minutes after, and I could put my whole hand on.

Medium warm...not bad at all.
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Topcat on May 04, 2019, 06:52:33 PM
@Marksmopar1 (https://forum.e-bodies.org/mlist/marksmopar1_2647)

Found em!   :bradsthumb:

I ordered these from Summit and I called them.

They found my prior order history from when I bought them back then.



MagnaFlow Performance Mufflers 14716

https://www.summitracing.com/parts/mpe-14716

Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Topcat on May 04, 2019, 07:03:05 PM
The tips I bought from a member and there's no way to recall who or where he bought them from.


Albeit, somebody here will know...2.5" Stainless steel with chromed tips.
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Marksmopar1 on May 04, 2019, 07:39:00 PM
 TopCat

  Fantastic, I will check these out for sure....
A very clean install, just what I am looking for.
   I already have Stainless 2.5" tips and wanted to go the 2.5 all the way through to the back. These muffs may be just what I need!
  Appreciated...
    So you say the sound is ok, How about highway cruise, drone?  I may go with an H pipe as well, this should keep some of the crackle sound down if there is any.

Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Topcat on May 04, 2019, 09:57:53 PM
I just re built my trans and I was telling a member here I can handle a 2  or 3 hour drive now.

3:54 Dana, Hemi engine is what I have. 
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Marksmopar1 on May 04, 2019, 10:21:06 PM
  TopCat,

If your able to do a 2-3 hour drive and handle the exhaust note, then I would say its ok, minimal drone. Perfect!
I looked up those Muffs, I see they are 7" round. I wont need polished stainless...but nothing offered in a 7" non polished Stainless 2.5 in and out that I saw. The 6" round has a non polished stainless that is cheaper being non polished....
   This has been good, Thank you for the info on the muffs... That will give me a simple install, look factory from behind the car and great sound! ...  I have the heat shields and stainless tips in 2.5 etc so this will be perfect!
   I just worry about the noise droning sound and crackle when you get into it. But from what your saying these concerns should be ok. Oh, and I did notice your also running a H pipe system, I find the H pipe does reduce some of heat crackle noise if any is present. 
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Topcat on May 04, 2019, 10:36:35 PM
The chrome muffler lower round half is visible under the valence from cars behind you.

Like a half moon chrome.

But I like it.

It shows you mean business.
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Topcat on May 05, 2019, 10:45:03 AM
at .47, you'll hear my car.

Considerably more quiet than some others.

https://www.facebook.com/bobby.mopar/videos/10217060254610368/?multi_permalinks=612187459257525%2C612181315924806&notif_id=1557075644534376&notif_t=group_activity
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Marksmopar1 on May 05, 2019, 07:16:38 PM
 TopCat.

That link to A Facebook Page is not working?
If it's a sound bit, I would like to see it!

    :ohyeah:
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Topcat on May 11, 2019, 05:52:58 PM
Quote from: Marksmopar1 on May 05, 2019, 07:16:38 PM
TopCat.

That link to A Facebook Page is not working?

    :ohyeah:







@Marksmopar1 (https://forum.e-bodies.org/mlist/marksmopar1_2647)

On Facebook:
Bay Area Classic Mopar Meet & Cruises

Scroll till you find May 4th.
Click on video.  .03 seconds

Best one: May 5 at 10:14 AM



Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Topcat on May 12, 2019, 12:54:06 PM
Quote from: Marksmopar1 on May 05, 2019, 07:16:38 PM
TopCat.

That link to A Facebook Page is not working?
If it's a sound bit, I would like to see it!

    :ohyeah:



@Marksmopar1 (https://forum.e-bodies.org/mlist/marksmopar1_2647)

Found it!

Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Marksmopar1 on May 12, 2019, 07:34:40 PM
  TopCat,

  That does sound good, just right....thank you for the help with the link...
Amazing Cuda...very sweet ride!
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: js27 on May 29, 2019, 08:54:54 AM
I have been running straight mufflers since 2001. I run a 440 with headers. No problems-I like the sound-drove it 150 miles to Carlisle at 70 MPH and didn't think it was too loud or annoying at all.
JS27
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Chryco Psycho on May 29, 2019, 09:44:51 AM
TC Cuda is Awesome , love the color & no billboards or vinyl roof + the 4 spd of course  :cooldance:
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Marksmopar1 on May 29, 2019, 11:57:09 AM
 Nice!
  What are you running for Muffs out back?
    Looking good!
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: dave73 on May 29, 2019, 12:06:52 PM
I'm running headers into a TTI X-Pipe, drectly into super turbo mufflers dumped under my rear axle. Pretty mild to be honest, so I had cutouts welded in.
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: benlavigne on May 29, 2019, 12:51:43 PM
Just ordered the Magnaflow 2-1/2'' system with the X pipe and just mufflers in place of the resonators.
I'll have it installed next week, I'll try to have a proper sound clip...

Ben
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Marksmopar1 on May 29, 2019, 02:49:02 PM
 Ben,,,

Fantastic,,,looking forward to hearing the system! 
  So, muffs under the car,,pipes out to the tips...cool.

  I would enjoy hearing more of the owner rides...exhaust note is something we all want, it has to be just right.

   
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: Marksmopar1 on January 09, 2020, 12:17:36 PM
 Hey Ben
Did you get that Magnaflow system on your car?
Curious to how everything went and the sound... any sound clips? :)
 
Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: soundcontrol on January 09, 2020, 01:56:57 PM
What is the difference between a muffler and a resonator? (inside). A drone at a certain rpm can be fixed with a J-pipe, that is an adjustable addition that cancels out a certain frequency, have a drone on my 08 SRT, at about 1900 rpm, might try a J-pipe there. I suspect a resonator is something similar... (but I don't know for sure).

Title: Re: E Body Exhaust running just mufflers under car eliminating resonators? Thoughts
Post by: MoparLeo on January 09, 2020, 11:51:17 PM
I manufactured glass packed mufflers in the early 70's and fabbed complete exhaust systems. Rule of thumb, the father away from the engine the muffler/resonators are the more effective they are at quieting the system. Just like a larger diameter tail pipe lowers the exhaust note/tone. Like blowing a horn. Smail pipe, high pitch, large pipe the tuba effect.