Mufflers?
#2851060
11/24/20 07:44 PM
11/24/20 07:44 PM
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Joined: Aug 2019
Posts: 9,471 Super Spudsville
Mr PotatoHead
OP
Half Baked
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OP
Half Baked
Joined: Aug 2019
Posts: 9,471
Super Spudsville
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What is the best combo of low noise/mellow sound and still a good measure of performance on the market currently?
Ive been running 3 inch magnaflows older Al. case and the newer SS case for years and I need a bit more stealth sounding muffler.
Thanks.
STOP POTATO HATE!
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Re: Mufflers?
[Re: Mr PotatoHead]
#2851213
11/25/20 01:12 AM
11/25/20 01:12 AM
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Joined: Aug 2005
Posts: 6,003 Salem
Grizzly
Moparts Proctologist
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Moparts Proctologist
Joined: Aug 2005
Posts: 6,003
Salem
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The old Thrush Turbos can't be beat, especially at 28 dollars each on Amazon.
I had them and they were surprisingly quiet, upped my performance a bit, and had a great sound at idle (318 2bbl W150)
Mo' Farts
Moderated by "tbagger".
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Re: Mufflers?
[Re: Grizzly]
#2851219
11/25/20 01:27 AM
11/25/20 01:27 AM
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Joined: Jun 2006
Posts: 5,162 CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,162
CT
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The old Thrush Turbos can't be beat, especially at 28 dollars each on Amazon.
I had them and they were surprisingly quiet, upped my performance a bit, and had a great sound at idle (318 2bbl W150) Don't put them on anything making any real power. They choked at a bare minimum 50 HP out of my 440, and honestly I'd say it was closer to 75-100, I'm talking HUGE difference on a 550 HP engine. There was an episode of MotorTrend's Engine Masters (after I figured out that these were my problem) where they killed something like 20-30 HP on a 350 HP engine. But man they did SOUND great. OP - run the longest case you can fit, 20 inches is great. I replaced my 3 inch in/out Hush Thrush Turbos (14 inch case) with 20 inch case 3 inch Ultra Flos and was surprised it is actually quieter with the Ultra Flos which are straight through. The long case makes a huge difference. It also made 479 WHP through the Ultra Flos with a stock stroke 440, so I don't think they are holding it back much power wise.
Last edited by GTX MATT; 11/25/20 01:27 AM.
Now I need to pin those needles, got to feel that heat Hear my motor screamin while I'm tearin up the street
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Re: Mufflers?
[Re: GTX MATT]
#2851227
11/25/20 02:42 AM
11/25/20 02:42 AM
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Joined: Aug 2005
Posts: 6,003 Salem
Grizzly
Moparts Proctologist
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Moparts Proctologist
Joined: Aug 2005
Posts: 6,003
Salem
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By your logic ANY 440 would gain 100 horsepower if you cut the pipes off at the manifolds and ran straight pipes. Gotcha.
Mo' Farts
Moderated by "tbagger".
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Re: Mufflers?
[Re: Grizzly]
#2851232
11/25/20 03:47 AM
11/25/20 03:47 AM
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Joined: Jun 2006
Posts: 5,162 CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,162
CT
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By your logic ANY 440 would gain 100 horsepower if you cut the pipes off at the manifolds and ran straight pipes. Gotcha. Yes, that is exactly what I said. Sorry if the post hurt your feelings, it was not intended to be an attack on you. I always liked the sound and thats why I gave them a try. But it seems like your reading comprehension skills are about on par with your comprehension of exhaust scavenging if you think that is what my post implied.
Last edited by GTX MATT; 11/25/20 03:55 AM.
Now I need to pin those needles, got to feel that heat Hear my motor screamin while I'm tearin up the street
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Re: Mufflers?
[Re: bonefish]
#2851284
11/25/20 09:49 AM
11/25/20 09:49 AM
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Joined: Jun 2014
Posts: 3,190 Md.
carnut68
master
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master
Joined: Jun 2014
Posts: 3,190
Md.
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Check out Pypes Race Pro and Street Pro mufflers. Mellow at low rpms and loud at wot.
America First!
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Re: Mufflers?
[Re: carnut68]
#2851293
11/25/20 10:27 AM
11/25/20 10:27 AM
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Joined: Feb 2003
Posts: 16,147 Mesa, Arizona
dart4forte
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 16,147
Mesa, Arizona
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I run a pair of mufflers from Accurate Ltd. They mimic the OE performance muffler. The run just fine on my bigblock GTS. Not sure how they would run on a big inch motor putting out a lot of power.
“So if it’s on the internet it must be true”
Abe Lincoln
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Re: Mufflers?
[Re: dart4forte]
#2851296
11/25/20 10:31 AM
11/25/20 10:31 AM
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Joined: Dec 2013
Posts: 4,680 Wichita
GY3
master
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master
Joined: Dec 2013
Posts: 4,680
Wichita
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I've been 10.0's at 133 mph with Dynomax Ultraflows.
They are very quiet and easy to live with driving around and give great performance on the throttle.
'63 Dodge 330 11.19 @ 121 mph Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs. 10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.
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Re: Mufflers?
[Re: Grizzly]
#2851334
11/25/20 12:10 PM
11/25/20 12:10 PM
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Joined: Jan 2003
Posts: 8,396 Highland, MI.
Sunroofcuda
master
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master
Joined: Jan 2003
Posts: 8,396
Highland, MI.
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The old Thrush Turbos can't be beat, especially at 28 dollars each on Amazon.
I had them and they were surprisingly quiet, upped my performance a bit, and had a great sound at idle (318 2bbl W150) Yep - they are quiet & sound "flat." The reason they are quiet, is they have small flow tubes internally. The Thrush California Boss Turbos with 2.5" inlets & outlets, have 2" diameter flow tubes inside. I used to look at blueprints of them all the time! They are NOT performance mufflers.
No Man With A Good Car Needs To Be Justified
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Re: Mufflers?
[Re: TC@HP2]
#2851335
11/25/20 12:17 PM
11/25/20 12:17 PM
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Joined: Jan 2003
Posts: 8,396 Highland, MI.
Sunroofcuda
master
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master
Joined: Jan 2003
Posts: 8,396
Highland, MI.
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Flowmasters were consistently the WORST flowing "performance" mufflers we tested - always. (2 chamber, 3 chamber, & Deltas). The internal steel plates were walls, & did not promote high flow - they did just the opposite.
No Man With A Good Car Needs To Be Justified
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Re: Mufflers?
[Re: 360view]
#2851698
11/26/20 09:14 AM
11/26/20 09:14 AM
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Joined: Jan 2003
Posts: 8,027 Tulsa OK
Bad340fish
master
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master
Joined: Jan 2003
Posts: 8,027
Tulsa OK
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I went from flowmasters to Ultra Flows on my Barracuda. While they are not quiet they are WAY quieter than the flowmasters, the car also picked up .1 at the track as well. It makes about 550-600HP and for what it is the volume level is acceptable. https://youtu.be/FEvTC9HFE0ILike others have said you might try throwing a glass pack in the system if you can fit one. My Jeep has a flowmaster 40 series and as I got older I gor tired of the 4.6L I6 making to much noise. I couldn't decide on a muffler change so I just had a muffler shop stick a 36" glass pack in front of the muffler. It kept the same sound but knocked the volume way way down. Now I can hear the rear end whine
Last edited by Bad340fish; 11/26/20 09:19 AM.
68 Barracuda Formula S 340
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Re: Mufflers?
[Re: Mr PotatoHead]
#2851874
11/26/20 03:13 PM
11/26/20 03:13 PM
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Joined: Aug 2003
Posts: 43,195 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,195
Bend,OR USA
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Where are you mounting them and where are your tailpipes coming out? I had a three inch system on my last street and strip Duster with a set of the older (2004 or so) 14 long 7 inch wide with 3.0 inch side inlet and center outlet Magnaflow muffs, not the stainless Ultra flow like now. Those muffs were mounted behind the rear end between the sub frames and the outer body 1/4 panels exiting at the rear bumper, sounded good inside and out at idle or part throttle and di get louder at WOT but not really bad inside. I could talk to people in the car and listen to the radio, roll up the windows and not notice a lot of exhaust noise, no drone or resonant frequency that I remember now at any cruise RPM up to 3500 RPM which was around 80 MPH Where you mount the muffs and where the tail pipes exit can make a difference on what you hear inside when driving
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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