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Dual exhaust
#1438304 Sat Jan 22 2022 07:10 PM
Joined: Sep 2005
Posts: 993
R
'Bolter
I am about to install Fenton headers and a dual exhaust. I want the extra power but I would like a low growl rather than something too loud... it’s a 1954 235... any suggestions for mufflers?


1953 3/4-Ton Chevy

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RB53
Re: Dual exhaust
rust bucket 53 #1438333 Sat Jan 22 2022 11:31 PM
Joined: Mar 2010
Posts: 10,076
5
'Bolter
Have you ever heard a 235 with dual exhaust once the gas pedal was hammered? You may well find that it is a racket which you would like to silence quite a bit. Personally I find that noise irritating to the ear. I am not against dual exhaust, just the clattering racket with a 235.

Re: Dual exhaust
rust bucket 53 #1438378 Sun Jan 23 2022 05:08 AM
Joined: Oct 2012
Posts: 126
D
'Bolter
I have a 1949 PU with a 235. I installed a 53/54 corvette exhaust manifold and Porter mufflers. A little noise but not that loud.

Re: Dual exhaust
rust bucket 53 #1438389 Sun Jan 23 2022 11:39 AM
Joined: Feb 2004
Posts: 24,252
H
Kettle Custodian (pot stirrer)
Originally Posted by rust bucket 53
I want the extra power but I would like a low growl rather than something too loud... it’s a 1954 235

Where is this "extra power" supposed to be coming from? With a cylinder head design from the 1920's, the only thing a dual exhaust system adds is another pipe and muffler to rust out, and a lot of extra expense. The constant ringing in my ears called tinnitus makes me wish I'd been kinder to my hearing a few decades ago.

I have invited several people to show me chassis dyno results of power they added by installing the popular dual carburetors and/or dual exhausts without making extensive internal engine modifications, and so far nobody has been able to document the alleged improvement they were looking for.
Jerry


"Freedom's just another word for nothing left to lose"
Kris Kristofferson

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!

WAG MORE- - - - - -BARK LESS!
Re: Dual exhaust
rust bucket 53 #1438427 Sun Jan 23 2022 04:59 PM
Joined: Jan 2019
Posts: 315
F
'Bolter
But Jerry, headers are second only to stickers for bonus power. Everyone knows that!


58 Apache, long bed fleetside, V8 w/SM420
Drivable but the rear axle needs work.
Re: Dual exhaust
rust bucket 53 #1438437 Sun Jan 23 2022 05:24 PM
Joined: Oct 2005
Posts: 3,518
"Hey! I sound like Darth Vader!!
My added power is off the charts.

OP, I believe that Magnaflow and a few other manufacturers have sound bites on their web sites. How that translates accurately to your ears from a real life sample, I don't know. But, at least, it will give you an idea of sound along with the manufacturers description.

Attached Files
1952suburban289.jpg (79.84 KB, 171 downloads)
Re: Dual exhaust
MNSmith #1438494 Sun Jan 23 2022 11:38 PM
Joined: Mar 2010
Posts: 10,076
5
'Bolter
Originally Posted by MNSmith
My added power is off the charts.
Sick brah!

(That's what the kids are saying these days, I think. They mumble.)

Re: Dual exhaust
52Carl #1438495 Sun Jan 23 2022 11:41 PM
Joined: Jan 2019
Posts: 315
F
'Bolter
Originally Posted by 52Carl
Sick brah!

(That's what the kids are saying these days, I think. They mumble.)

I am pretty sure that is what the kids were saying 30 years ago...


58 Apache, long bed fleetside, V8 w/SM420
Drivable but the rear axle needs work.
Re: Dual exhaust
rust bucket 53 #1438562 Mon Jan 24 2022 03:56 PM
Joined: Feb 2000
Posts: 4,439
J
'Bolter
The loud deep tones comes from high compression, low compression engines just rattle the pipes. Any muffler that fits that's not straight through will be good. Hollow core mufflers ( Flow Master ) will rattle the pipes.

Re: Dual exhaust
rust bucket 53 #1438570 Mon Jan 24 2022 04:36 PM
Joined: Jan 2014
Posts: 1,965
J
'Bolter
I think the deceleration cackle is the annoying part of a stovebolt dual exhaust.

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