Re: mufflers
[Re: cesar perez]
#1154207
01/11/12 01:31 AM
01/11/12 01:31 AM
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Joined: Feb 2011
Posts: 4,302 Nebraska
72Swinger
master
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master
Joined: Feb 2011
Posts: 4,302
Nebraska
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I recommend Borla XR1 12" body. They arent cheap but they are unbelievably wicked sounding and sound like a kitten at idle.
Mopar to the bone!!!
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Re: mufflers
[Re: 72Swinger]
#1154208
01/11/12 01:43 AM
01/11/12 01:43 AM
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Joined: Jan 2003
Posts: 19,385 Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,385
Las Vegas
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I have always liked Borlas, well that is after Scott Brown no longer made mufflers. We have his stuff on our Camaro(sorry)and it is quiet as a church mouse and still runs bottom 10's. Anyway the key is to put the muffler as far back as possible in the car. By the rear bumper if possible as the last part of the exhaust before the tip.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: mufflers
[Re: Al_Alguire]
#1154209
01/11/12 01:13 PM
01/11/12 01:13 PM
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Joined: Jan 2003
Posts: 9,892 Weddington, N.C.
Streetwize
master
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master
Joined: Jan 2003
Posts: 9,892
Weddington, N.C.
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I think the D-max Ultraflows sound great but are not gonna qualify as "Very Quiet" On a big motor car with 11.5:1 and a big cam they don't knock the DB's down very much...If you look at an UF it's essentially a perforated resonator tube in a muffler case. D-max Hemi Turbo's really are reasonably quiet but arguably more restrictive than Ultraflows on a big motor at high RPM. But Real world 95% of the time... not very much performance difference on a properly designed system with collector extentions and an X pipe. I run them on a 12:1 ~720hp 517 and they're quiet "enough" ....barely. I had considered Ultraflows for this motor but with the cam and overlap I might as well run open headers as far as knocking down the Decibels. On my old 600 hp 508 they would have been fine though. Dynomax has a muffler that is a hybrid of a short Ultraflow with a spring loaded Flapper valve, that may be worth looking at. Hooker Aero's sound really good and are low restriction...based on your request that might be one worth looking at. Edelbrock Stainless mufflers that had a split flow -<>- (Like an Ultraflow but with a double Y in the case) are fairly quiet and very low restriction as well. I think they copied the design from the SLP Firehawk. Not sure if they still make them anymore though, but they're a nice alternative. In many states they're is an 80 or 85 DB max at 100 feet before they can cite you for noise.
Last edited by Streetwize; 01/11/12 01:15 PM.
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Re: mufflers
[Re: cesar perez]
#1154210
01/11/12 01:46 PM
01/11/12 01:46 PM
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Joined: Jan 2003
Posts: 13,404 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,404
Marion, South Carolina [><]
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Quote:
at the current time i run 4 inch magnaflow i just hate the noise i waNT IT TO BE QUIET AND FLY
Are you staying w/ a 4" system? If so, that's going to really limit your choices for mufflers. Need to know this so we can recommend you something. Some that have been mentioned here are not available in 4".
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: mufflers
[Re: old_racer]
#1154212
01/11/12 04:24 PM
01/11/12 04:24 PM
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Joined: Jan 2003
Posts: 13,404 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,404
Marion, South Carolina [><]
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Quote:
Hi, are there any round type that you could slip on a collector to quiet it down some? without doing an actual exh system 3 1/2in. collector. this is for a race car. Russ
You could use a pair of Dynomax Bullets or Flowmaster Outlaws. They don't look like they'd do much, but they're better than open headers. Not sure if they'd slip over your collector...might have to flare them out a little.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: mufflers
[Re: Dodgem]
#1154213
01/11/12 04:33 PM
01/11/12 04:33 PM
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Joined: Nov 2007
Posts: 1,600 Alberta Canada
StrokerAspen
top fuel
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top fuel
Joined: Nov 2007
Posts: 1,600
Alberta Canada
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Quote:
Dynomax 3" welded ultraflows
That's what I run. FWIW, on my car, it ran 10.68 open header'd, and 10.78 with my full exhaust. My exhaust is kind of heavy @ 70 lbs. so most of that was weight.
-Kenny
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Re: mufflers
[Re: an8sec70cuda]
#1154214
01/11/12 04:42 PM
01/11/12 04:42 PM
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Joined: Oct 2003
Posts: 7,506 Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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Did anyone read the OP?? He said "very quiet". Maybe he should have given a decibel reading he wanted to stay under, cause none of the muffs listed fall in the very quiet catagory IMO. Straight throughs of any kind shouldn't even be a consideration - unless they are mounted on a sewing machine .
Fastest 300
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