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which type of muffler?
#1
Hey guys, I have a 72 conv, w/351c 2v, 4bbl edelbrock, headers. The exhaust came w/turbo mufflers which are pretty loud. It's louder w/the top down & can't even hear the stereo at times, kids complain. I want to decrease the exhaust sound without losing HP. I was told that I can purchase the mufflers from flowmaster (70 series) which should decrease the sound. Any suggestions would be appreciated. I know flowmasters & Borla are expensive, any other place that sells at a affordable price? again, I want to make it quieter. At one point I was going to remove headers & go back to manifolds. Please provided any ideas that would rectify my situation. Thanks in advance.
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#2
You might try adding resonators. Where to place them is always the question but it may accomplish the job. http://www.summitracing.com/parts/JEX-AR3012S-

Chuck
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#3
sharpstang72;60840 Wrote:Hey guys, I have a 72 conv, w/351c 2v, 4bbl edelbrock, headers. The exhaust came w/turbo mufflers which are pretty loud. It's louder w/the top down & can't even hear the stereo at times, kids complain.


I don't understand the problem?

Jim

M code 71 Mach 1, 351 4V Cleveland, Ram Air (not factory), C6 Trans, 3.5 rear
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#4
The design of the muffler is key here.
BIG pipe (like my 3") will make it loud,
Center in Center out (like mine) will make it loud ,so go with offset in and out design if possible.
Cam shaft design,
Headers would too,
I live my Flomasters but are any of them quiet?
Mangna Flow or Big big case/small pipe size Flomasters.
The resonators are a good call. My old Probe had on and got nutty loud w/o them.
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#5
I put Dynomax mufflers on my 65 vert. They have a nice rumble but are fairly quiet...almost too quiet but is great if you have the top down.

[Image: 386_07_10_13_5_58_42.jpeg]
My Mustangs:
71 M-code Mach 1, Medium Blue/White Sport, 4R70W, 3L50, Factory Ram Air.
72 Q-code Mach 1, Pewter/Black Sport, 4-spd, 3L25.
65 Convertible, Britney Blue/White/White, more modified than original.
05 Convertible, Legend Lime/Tan/Tan, future classic??
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#6
My wife doesn't like the turbo mufflers on mine, too loud, so I'm going for the Dynomax VT next time, supposed to be reasonalby quiet cruising and make a little noise when the foot is down...



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
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#7
Don C;60884 Wrote:My wife doesn't like the turbo mufflers on mine, too loud, so I'm going for the Dynomax VT next time, supposed to be reasonalby quiet cruising and make a little noise when the foot is down...

Yup, when you mash the go pedal it gets a bit louder but not too loud, just a nice rumble.

[Image: 386_07_10_13_5_58_42.jpeg]
My Mustangs:
71 M-code Mach 1, Medium Blue/White Sport, 4R70W, 3L50, Factory Ram Air.
72 Q-code Mach 1, Pewter/Black Sport, 4-spd, 3L25.
65 Convertible, Britney Blue/White/White, more modified than original.
05 Convertible, Legend Lime/Tan/Tan, future classic??
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#8
Hemi super turbo or walker quiet flow. The longer, the quieter.

1973 Mach 1 Q code 351 4V, 9A paint, standard interior, 3.50 rear, C6 trans.
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#9
Flowmasters are not quiet, no matter which ones you get.

Agreed on the Dynomax, nice sounding muffler.

Jeff T.

Low buck, touring style, '73 Convertible "rolling restoration", 351c, 2v heads with a shave and a haircut, Performer intake, Holley 650(ish), roller rockers, screw in studs, guideplates, stainless valves, Duraspark / Motorsports MSD, T-5 conversion. 1-1/8" front, 3/4" rear swaybars KYB shocks and some home brewed subframe connectors. Future plans; JGC steering box, Cobra brakes and... paint, interior, etc.

When I die I want to die like grandpa, peacefully in my sleep... not screaming, like his passenger.

[Image: 1_12_09_14_10_15_11.png]
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#10
You might just leave the kids at home........... :-)

On a more serious note. Headers are often overlooked when it comes to noise problems. They add a lot to it. Going back to manifolds will probably lower the volume and give you better torque at low RPMs.
As for mufflers, I have the Edelbrock ones. Those are pretty uncommon, at least here I have yet to see another car with them. They sound full but are pretty quiet until you really step on the gas. Then .... well, gotta have SOME fun, don't we?
:-)
If you take a look at the video in my signature below, you can hear the mufflers, although the music unfortunately covers the sound a lot.

But on the freeway, there is no way I can listen to the stereo either......

[Image: 1z21rv4.png]

Mike

"If I were you...... I´d rather be me."  Tongue

Check out my video:
http://www.7173mustangs.com/thread-my-mustang-in-action

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