Muffler removal

SkipBurney · Apr 20, 2020

Has anyone just removed their muffler and tossed it in the trash and went with a straight pipe. I did that with my 6.0 Powerstroke and you couldn`t tell any difference in fact I think it runs better without it. I am thinking about doing that with my 89 7.3 any suggestions?

u2slow · Apr 20, 2020

It will be loud. A turbo actually does a lot of silencing.

Oledirtypearl86 · Apr 20, 2020

Yup my 6.9 has been strait piped for years

SkipBurney · Apr 20, 2020

Does it have a turbo on it

IDIBRONCO · Apr 20, 2020

As long as the exhaust exits out toward the back of the truck (in the factory location or straight back), I don't think it's all that loud inside. I ran my first 85 F250 that way for several years.

franklin2 · Apr 20, 2020

As with your 6.0, I didn't see much power difference. I have a muffler back on my truck and it's NA 7.3.

KevSrFord · Apr 20, 2020

I'm running straight pipe dual 4" stacks ( no crossover pipe). Yes it's loud but not unbearable until you put your foot into it and then it will wake the dead.

Kevin 007 · Apr 20, 2020

Not much power difference on an n/a. And they are loud. Sounds cool, for about 7 mins

cozinsky · Apr 21, 2020

I have a dual exhaust system with glass pack mufflers. The tail pipes exit behind the rear wheels. Inside with the windows rolled up I don't really notice it, but once you get above about 2,100 RPM it gets pretty loud. They have a very sharp snapping sound at higher engine speed.

SkipBurney · Apr 21, 2020

Well that settles it for me the muffler stays

IDIBRONCO · Apr 21, 2020

If you want a little more power and still don't want to run it straight, you could buy a good flowing muffler and ditch the restrictive stock one.

mexicanjoe · Apr 23, 2020

how restrictive is the oem mufler. Mine appears to be stock from 1989?

Enginerd · Apr 23, 2020

mexicanjoe said:
how restrictive is the oem mufler. Mine appears to be stock from 1989?

Ha if that's the case probably about 1" of passage through the soot buildup. And 200 pounds of carbon and rust inside. I straight piped mine and felt bad about trying to get up to speed because it was so loud. I have a Cherry Bomb Salute on there now and like it quite a bit. I just miss my jake brake sound.
You'll do good to to replace the stock y-pipe while you're at it. I put dual 2 1/2" into a single 3" and it helped my EGT's and mpg's good bit

CDX825 · Apr 24, 2020

When the muffler rotted out on my 6.9 I decided to straight pipe it. Really wasn't much louder than the thrush welded muffler I had on there except when you had it floored. Mind you this is with all 3 inch pipe from the y back.

Buddy of mine did the same thing with his truck. Only his was 2.5 inch pipe and it was almost obnoxious loud.

saburai · Apr 24, 2020

Imho leave it or replace it with a better flowing one. If you spend a lot of time behind the wheel, the muffler, in addition to quieting things down, knocks the drone off and makes the ride much more pleasant.

Muffler removal

SkipBurney

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u2slow

bilge rat

Oledirtypearl86

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SkipBurney

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IDIBRONCO

IDIBRONCO

franklin2

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KevSrFord

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Kevin 007

Full-floater

cozinsky

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SkipBurney

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IDIBRONCO

IDIBRONCO

mexicanjoe

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Enginerd

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CDX825

filtration nut

saburai

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