True Duals Muffler!?! - Chevelle Tech
Engine General Engine Discussion.

View Poll Results: Which Muffler??
Borla XR-1 Race Muffler Round/Oval 8 9.52%
Dynomax Ultra Flo Round/Oval 16 19.05%
Sweet Thunder Chambered Tube 1 1.19%
Dynomax Race Bullets 1 1.19%
Flowmaster 40/44s 28 33.33%
Spintech Pro Street 8 9.52%
Others(If this is your choice please post the muffler) 22 26.19%
Voters: 84. You may not vote on this poll

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post #1 of 36 (permalink) Old Feb 4th, 10, 10:29 PM Thread Starter
 
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Talking True Duals Muffler!?!

Which Muffler should i get with my set up: 406SBC (AFR 210s), Big Cam, 1 3/4th LT Headers, and X pipe. Dumping the the muffler at the axle! The car will be a Weekend fun car so loudness really isnt a big problem execpt for cruising.
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post #2 of 36 (permalink) Old Feb 4th, 10, 10:34 PM
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Daniel
 
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Re: True Duals Muffler!?!

I just installed a set of Pypes Race Pro's on my 70 chevelle BBC with an x-pipe, 3 inch all the way out. I really like the sound! I have 1 3/4 headers also.

1970 Chevelle - Best time at the WCCG 12.749 @ 108.606, 2.011 60' on street tires!

427 BBC, 215 heads, 2.19/1.88 valves with some port work, 60212 Lunati Hyd Roller, 3310 Holley 750, Performer RPM intake, TH350 with shift kit, 3.55 gears 12 bolt posi, Pypes 3 inch kit, it's alive... again!!!
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post #3 of 36 (permalink) Old Feb 4th, 10, 10:58 PM
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Brandon
 
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Re: True Duals Muffler!?!

I just installed the Race Pros, because my FlowMasters were driving me crazy with the vibrations in the interior. The race pros are a bit quieter but do have a nice rumble.

I would stay away from FM's, i'd say get Pypes Violators. Loud, not a lot of drone, a little gritty, and have a slight chambered sound.


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K&N Cold Air Intake, dual Magnapacks, deleted cats, PCM tune, JHP Pro Billet short shifter

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post #4 of 36 (permalink) Old Feb 4th, 10, 11:43 PM
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Bruce
 
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Re: True Duals Muffler!?!

I just installed Magnaflows 3 inch all the way back with an X pipe and it's sound is orgasmic.
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post #5 of 36 (permalink) Old Feb 5th, 10, 12:08 AM
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Kevin
 
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Re: True Duals Muffler!?!

I have Hooker Aero chambers. Not overly loud.

1971 Chevelle Malibu Convertible
Dark Green Metalic, Pearl stripes, Black Top
400 sbc, TH350, Posi w/ 3.55's

Murphy's Law always prevails.........
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post #6 of 36 (permalink) Old Feb 5th, 10, 12:25 AM
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Justin
 
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Re: True Duals Muffler!?!

ultraflow rounds... flow like bullets but without the noise. Still loud but milder than bullets so nicer for cruise.
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post #7 of 36 (permalink) Old Feb 5th, 10, 1:45 AM
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Tom
 
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Re: True Duals Muffler!?!

I have the old Flowmaster 30 Series on my 406 and love them.

70 Chevelle 406/700R4
69 Camaro SS
71 Nomad Wagon 250 ci.
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post #8 of 36 (permalink) Old Feb 5th, 10, 8:31 AM
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Buck
 
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Re: True Duals Muffler!?!

When they put the duals on my car, they installed V Force mufflers. They have a decent sound and seem to be a good muffler as they have been on the car for 11 years.

Cruzin4Fun
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1972 Chevelle
Dakota Digital VHX Gauges
Chris Straub full roller setup.
Retro .510/.492 221/223..108 Sep
Scat Full Rotating assembly
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post #9 of 36 (permalink) Old Feb 5th, 10, 10:56 AM
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Re: True Duals Muffler!?!

I had Magnaflows on my el camino for 1 week. That's how long it took to get the flowmaster 70 series I ordered after driving home from the muffler shop. The magnaflows were just too obnoxious.

Don Pizzi
66 el camino LT1
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post #10 of 36 (permalink) Old Feb 5th, 10, 11:31 AM
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Re: True Duals Muffler!?!

Quote:
Originally Posted by pizzi-man View Post
I had Magnaflows on my el camino for 1 week. That's how long it took to get the flowmaster 70 series I ordered after driving home from the muffler shop. The magnaflows were just too obnoxious.
What size were they?

I've run a few different set ups on a few different cars. My only conclusion after all of that is that I really, really dislike flowmasters for both sound and, well, lack of "flow". Cant imagine someone going from mag to flowmaster for less obnoxious and or less resonance given what my ears have reported to my head but curious about your decision.

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post #11 of 36 (permalink) Old Feb 5th, 10, 11:37 AM
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Jeff
 
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Re: True Duals Muffler!?!

If you search Pyes website you don't need 3 inch from front to back if you have anything 450 hp and under you will loose hp they say so I have 2.5 inch flow masters.I haven't heard these mufflers with my new 396 cause as it hasn't fired yet but It sounded good with a 305 TPI.My truck has 3 inch and is to big for the amount of horse power I have. with alot of drone it sets off car alarms too that part still makes me laugh but I am sure irritates others.
Jeff
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post #12 of 36 (permalink) Old Feb 6th, 10, 2:10 PM
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Re: True Duals Muffler!?!

You need to listen to some in person to get an idea of what you want.

Quote:
This post is a duplicate of a post that you have posted in the last five minutes.

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post #13 of 36 (permalink) Old Feb 7th, 10, 4:05 PM
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Re: True Duals Muffler!?!

Quote:
Originally Posted by Beaux View Post
What size were they?

I've run a few different set ups on a few different cars. My only conclusion after all of that is that I really, really dislike flowmasters for both sound and, well, lack of "flow". Cant imagine someone going from mag to flowmaster for less obnoxious and or less resonance given what my ears have reported to my head but curious about your decision.
The magnaflows were like 18 inch units and resonated to much in the cab. They were just too loud. I go to work at 5:30 AM and you could hear it idle from blocks away. I picked the 70 series flowmasters because there for a 2 into one system muffler which has a much bigger body of approx. 30 inches. I have a 2 1/2 inch stainless system from headers to tail with the x crossover and now I can hear the radio when crusing and I don't wake the neighbors at 5:30 anymore. The car has a very mello sound at idle and a very business like sound when I step on it.

Don Pizzi
66 el camino LT1
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post #14 of 36 (permalink) Old Feb 8th, 10, 9:16 PM
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Brian
 
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Re: True Duals Muffler!?!

I used muffler shop brand 18" glass packs & I like them (the system is 2.5" with an x crossover). They sound wicked at wide open throttle & they are easy to fit under the car.

1971 Malibu, factory buckets/full gauges/console, 377 roller cammed small block, Turbo 400, 3.42 10 bolt posi (Buick), - All your base are belong to us.
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My Chevelle w/ open headers:
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My Chevelle w/ 2.5 pipes + X crossover/18 inch glass packs:

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post #15 of 36 (permalink) Old Feb 9th, 10, 9:35 AM
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Re: True Duals Muffler!?!

Generic turbo mufflers from my local muffler shop which have 2 1/2 inlets/outlets. This was a common muffler for the late-60s/70s period.

Tom Parsons
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