Muffler Q
#2554807
09/25/18 11:35 PM
09/25/18 11:35 PM
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Joined: Sep 2015
Posts: 1,096
Australia
ozymaxwedge
OP
super stock
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OP
super stock
Joined: Sep 2015
Posts: 1,096
Australia
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Question. Will a pair of 4" Magnaflow mufflers be quieter than a pair of 3.5" Hooker aerochambers ??
Car is 547 big block with quality custom headers and twin 4" X pipe, mufflers before the diff , No tail pipes .
1963 Plymouth Max Wedge
1971 Barracuda
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Re: Muffler Q
[Re: stumpy]
#2554907
09/26/18 07:35 AM
09/26/18 07:35 AM
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Joined: Nov 2010
Posts: 3,696
jersey
Spaceman Spiff
master
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master
Joined: Nov 2010
Posts: 3,696
jersey
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If you are using it as a daily driver you need to get the exhaust out from under the car. Too many places for fumes to get into the interior and it's sleepy time crash. A daily driven 547 stroker, with 4 inch exhaust?
526 cubes of angry wedge, pushbutton shifted, 9 passenger killer!
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Re: Muffler Q
[Re: ozymaxwedge]
#2554930
09/26/18 10:25 AM
09/26/18 10:25 AM
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Joined: Jan 2003
Posts: 13,354
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,354
Marion, South Carolina [><]
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I think it'll be close. The Aerochambers are pretty mellow anywhere BUT WOT, then they scream pretty good. The Magnaflows are about the same IMO.
I have a pair of 4" Hooker Max Flows (straight through style) for my cuda and was VERY surprised how quiet they are.
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: Muffler Q
[Re: an8sec70cuda]
#2554961
09/26/18 11:34 AM
09/26/18 11:34 AM
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Joined: Jan 2006
Posts: 8,162
USA
360view
Moparts resident spammer
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Moparts resident spammer
Joined: Jan 2006
Posts: 8,162
USA
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I have a pair of 4" Hooker Max Flows (straight through style) for my cuda and was VERY surprised how quiet they are.
Could you give us an estimate of the lengths of tailpipe before and after these large diameter mufflers? Your post made me think that surely 4 inch diameter pipes have lower exhaust gas temperatures (EGT) than 2.5 or 3 inch diameter. If the EGT changes then the RPM where annoying resonances occur changes. Weather changes EGT, including humidity. Makeup of gasoline changes EGT, especially percent of ethanol. I now realize I have been “wearing blinders” as regards another important factor in EGT. Changing to bigger pipes would move resonances. Changing to smaller pipes would too.
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Re: Muffler Q
[Re: ozymaxwedge]
#2555144
09/26/18 06:42 PM
09/26/18 06:42 PM
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Joined: Jan 2003
Posts: 13,354
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,354
Marion, South Carolina [><]
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Those Dynomax Super Turbos are good as long as you don't mind losing a bunch of power compared to a straight through style muffler. Switched my dad's road runner (480-500 hp 440 six pack) from a pair of 3" Ultra Flows to 3" Super Turbos and was immediately disappointed by a very noticeable seat of the pants power loss.
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: Muffler Q
[Re: 360view]
#2555145
09/26/18 06:43 PM
09/26/18 06:43 PM
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Joined: Jan 2003
Posts: 13,354
Marion, South Carolina [><]
an8sec70cuda
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 13,354
Marion, South Carolina [><]
|
I have a pair of 4" Hooker Max Flows (straight through style) for my cuda and was VERY surprised how quiet they are.
Could you give us an estimate of the lengths of tailpipe before and after these large diameter mufflers? Your post made me think that surely 4 inch diameter pipes have lower exhaust gas temperatures (EGT) than 2.5 or 3 inch diameter. If the EGT changes then the RPM where annoying resonances occur changes. Weather changes EGT, including humidity. Makeup of gasoline changes EGT, especially percent of ethanol. I now realize I have been “wearing blinders” as regards another important factor in EGT. Changing to bigger pipes would move resonances. Changing to smaller pipes would too. Mufflers in stock location w/ turndowns at the axle.
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: Muffler Q
[Re: Spaceman Spiff]
#2555265
09/26/18 10:54 PM
09/26/18 10:54 PM
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Joined: Sep 2015
Posts: 1,096
Australia
ozymaxwedge
OP
super stock
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OP
super stock
Joined: Sep 2015
Posts: 1,096
Australia
|
If you are using it as a daily driver you need to get the exhaust out from under the car. Too many places for fumes to get into the interior and it's sleepy time crash. A daily driven 547 stroker, with 4 inch exhaust? Yes .
1963 Plymouth Max Wedge
1971 Barracuda
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Re: Muffler Q
[Re: ozymaxwedge]
#2555270
09/26/18 10:58 PM
09/26/18 10:58 PM
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Joined: Sep 2015
Posts: 1,096
Australia
ozymaxwedge
OP
super stock
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OP
super stock
Joined: Sep 2015
Posts: 1,096
Australia
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an8sec70cuda Hahahaha, if you painted that tail panel on your car orange then I would think it is my car.
Same shocks, same diff cover, same caltracs, same dual feed fuel tank and same mufflers but mine are black , great minds ....
Last edited by ozymaxwedge; 09/26/18 11:00 PM.
1963 Plymouth Max Wedge
1971 Barracuda
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Re: Muffler Q
[Re: ozymaxwedge]
#2555885
09/28/18 10:25 AM
09/28/18 10:25 AM
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Joined: Jan 2003
Posts: 13,354
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,354
Marion, South Carolina [><]
|
an8sec70cuda Hahahaha, if you painted that tail panel on your car orange then I would think it is my car.
Same shocks, same diff cover, same caltracs, same dual feed fuel tank and same mufflers but mine are black , great minds ....  
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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