muffler removal?
Postmaster
Joined: Feb 2002
Posts: 2,773
Likes: 0
From: Bonney Lake, WA
muffler removal?
Slightly more power, a lot more noise. It really depends on your taste, but I didn't like the sound of mine without a muffler. I also have a downpipe, a gutted EBPV, and a 4" system, so there isn't much restriction left, and the flutter from the turbo was unacceptable to me. Now, I've added a 40" long Donaldson muffler, and it's a whole lot better.
Some guys love the sound of straight pipes, though.
If you remove the cat, you'll gain more power, and the sound won't be offensive. That was my first step, and it made a lot more difference than removing the muffler.
Some guys love the sound of straight pipes, though.
If you remove the cat, you'll gain more power, and the sound won't be offensive. That was my first step, and it made a lot more difference than removing the muffler.
Postmaster
Joined: Feb 2000
Posts: 2,759
Likes: 2
From: Auburn,Al
muffler removal?
it also helps to increse boost along with lowering egt's 
go with a muffler though...the powerstoke just doesnt sound too good without a muffler...unless you have a catty
nothing sounds like a straight 6 diesel with just a pipe and a turbo
go with a muffler though...the powerstoke just doesnt sound too good without a muffler...unless you have a catty
nothing sounds like a straight 6 diesel with just a pipe and a turbo
Elder User
Joined: Dec 2001
Posts: 713
Likes: 0
From: C H I C A G O
muffler removal?
I did the straight pipe thing for awhile - but didn't like the "turbo flutter" - so now i have a flowmaster big block muffler. Plans are calling for a Hypermax 5'' system with muffler - to lower my EGT's.
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Senior User
Joined: Jan 2002
Posts: 398
Likes: 2
muffler removal?
i was fishing because i saw a dyno test navistar ran on a stock 2002 f250. they were useing a chassis dyno.
ran it first on the stock set up. 280hp 18lb boost
took the muffler off. 250hp 16lb boost
was told the reduced back pressure of no muffler caused this. i thought it was interesting being around here there are alot of guys that the day they get their new powerstroke they cut the muffler off. so in stock form it looks like all you do is make more noise.
ran it first on the stock set up. 280hp 18lb boost
took the muffler off. 250hp 16lb boost
was told the reduced back pressure of no muffler caused this. i thought it was interesting being around here there are alot of guys that the day they get their new powerstroke they cut the muffler off. so in stock form it looks like all you do is make more noise.
Postmaster
Joined: Feb 2000
Posts: 2,759
Likes: 2
From: Auburn,Al
muffler removal?
[updated:LAST EDITED ON 06-Sep-02 AT 00:25 AM (EST)]you sure about that? the turbo gives the motor all the backpressure it needs, no backpressure after the muffler enables the turbo to spool up quicker, and higher, thus more power is freed up, and lower egt's, i noticed a small increase when i removed my muffler to put on my banks exhaust
go to ford-diesel.com and ask this question and see what ya get, the response will be alot better
go to ford-diesel.com and ask this question and see what ya get, the response will be alot better
Senior User
Joined: Feb 2002
Posts: 444
Likes: 0
From: Carol Stream, IL
muffler removal?
I run the hypermax 5 inch exhaust and no muffler, my buddy runs it with a muffler and he thinks my truck is faster, we have not raced yet though, we will save that for the drag strip.
2001 F-350 CC Lariat 4X4 LB PSD SRW, Heated leather, off road package, western snow plow, strobe lights in parking lights and backup lights, tinted windows, stull billet insert, pioneer cd player, rockford fosgate 700S amp rocking 3 JL Audio 10W0's behind back seat, husky liners front and back,Banks transcommand, Hypermax "hot rod" chip, Hypermax pryo/boost gauge and Hypermax 3.5 inch downpipe and 5 inch exhaust.
2001 F-350 CC Lariat 4X4 LB PSD SRW, Heated leather, off road package, western snow plow, strobe lights in parking lights and backup lights, tinted windows, stull billet insert, pioneer cd player, rockford fosgate 700S amp rocking 3 JL Audio 10W0's behind back seat, husky liners front and back,Banks transcommand, Hypermax "hot rod" chip, Hypermax pryo/boost gauge and Hypermax 3.5 inch downpipe and 5 inch exhaust.
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Freshman User
Joined: Sep 2002
Posts: 28
Likes: 0
From: US
muffler removal?
Hey Guy's,
I own a True Blue F-350 PSD Crew, LB, SRW. I recently removed the muffler primarily to lower EGT's until I decide what exhaust to go with. The turbo wistle is cool, but the turbo flutter noise is not as desirable. A few friends said it sounds like a chopper. My wife said it sounds like a jack hammer (she hates the new sound).
I haven't heard the open system with duals, but I'm assumming it will be very similar. I may attempt the dual set up with no muffler, if I don't like it I will add a muffler with very little restriction.
I own a True Blue F-350 PSD Crew, LB, SRW. I recently removed the muffler primarily to lower EGT's until I decide what exhaust to go with. The turbo wistle is cool, but the turbo flutter noise is not as desirable. A few friends said it sounds like a chopper. My wife said it sounds like a jack hammer (she hates the new sound).
I haven't heard the open system with duals, but I'm assumming it will be very similar. I may attempt the dual set up with no muffler, if I don't like it I will add a muffler with very little restriction.
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Freshman User
Joined: Sep 2002
Posts: 28
Likes: 0
From: US
muffler removal?
>Hey Guy's,
>
>I own a True Blue F-350 PSD Crew, LB, SRW. I recently
>removed the muffler primarily to lower EGT's until I decide
>what exhaust to go with. The turbo wistle is cool, but the
>turbo flutter noise is not as desirable. A few friends said
>it sounds like a chopper. My wife said it sounds like a jack
>hammer (she hates the new sound).
>
>I haven't heard the open system with duals, but I'm
>assumming it will be very similar. I may attempt the dual
>set up with no muffler, if I don't like it I will add a
>muffler with very little restriction.
P.S. It's an 02 F-350
>
>I own a True Blue F-350 PSD Crew, LB, SRW. I recently
>removed the muffler primarily to lower EGT's until I decide
>what exhaust to go with. The turbo wistle is cool, but the
>turbo flutter noise is not as desirable. A few friends said
>it sounds like a chopper. My wife said it sounds like a jack
>hammer (she hates the new sound).
>
>I haven't heard the open system with duals, but I'm
>assumming it will be very similar. I may attempt the dual
>set up with no muffler, if I don't like it I will add a
>muffler with very little restriction.
P.S. It's an 02 F-350
Freshman User
Joined: Oct 2002
Posts: 31
Likes: 0
muffler removal?
[updated:LAST EDITED ON 09-Oct-02 AT 04:40 PM (EST)]I purchased a 2000 F-350 7.3. It does not have anything at all in the exhaust just pipe from the turbo back to the tip. No muffler no nothing just pipe. I have this noise like a high pitched clanking.
Turbo flutter? Is that what I am hearing? Will adding a muffler stop this noise?
Turbo flutter? Is that what I am hearing? Will adding a muffler stop this noise?
Freshman User
Joined: Sep 2002
Posts: 28
Likes: 0
From: US
muffler removal?
With out actually hearing your specific noise, I can only say it sounds like turbo flutter. If you are really concerned, you should stop by your local dealer or have someone with powerstrke experience take a listen.
Just my $.02
02' F-350 PSD, True Blue, Crew, LB, SRW, currently running straight pipe exhaust.
Just my $.02
02' F-350 PSD, True Blue, Crew, LB, SRW, currently running straight pipe exhaust.
Elder User
Joined: Dec 2001
Posts: 713
Likes: 0
From: C H I C A G O
muffler removal?
I betcha that noise is the Turbo "Flutter" or "Chatter" . I recently put a exhaust cut-out on the truck , so i can basically run a full open exhaust whaen i choose too. With the cutout open , the turbo spools up much faster , and the EGT's are almost cut in half. Yhe only downside is the flutter , which is made even louder becasue it is right under the truck. I think the Hypermax 5'' exhaust WITH a muffler is the way to go...
Freshman User
Joined: Sep 2002
Posts: 41
Likes: 0
muffler removal?
I just (today) had my muffler ( had no cat to start with ) taken off and a Dynomax superflow (straight thru like a glass pack) with a 4" in and outlet installed in its place... I like the sound.but mainly I did this to help with EGT's.. im not hearing any clacking or clinging.. just a real deep throaty sound.. I like it so far... and with having them use the 4" on the stock 3.5" pipe (welded ) I can re-use the same muffler if i upgrade to a 4" pipe..
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