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Old March 4th, 2009, 04:39 PM   #1
Fordsforever_F250
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No muffler on 02 powerstroke diesel

I am wondering if there would be any downsides to replacing my muffler with a straight piece of pipe. I own a 02 F250 supercab, 7.3l supercab. Shes doesnt have as much rumble as id like. After my warranty expires im planning on gettn a dpf kit and running stacks. Would there be any downsides to running real straight pipes with no resrictions?

This is my first diesel so im a bit dum founded on them
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Old March 4th, 2009, 04:41 PM   #2
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The only downside would be you didn't do it sooner.
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Old March 4th, 2009, 04:43 PM   #3
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Old March 4th, 2009, 04:43 PM   #4
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i know people that have done it and they have not had any problems, it just sounds cooler
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Old March 4th, 2009, 05:22 PM   #5
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X3, I did it for a while on mine but it had a drone at 75 i didn't like so I put a race muffler on it and now I love it!
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Old March 4th, 2009, 06:48 PM   #6
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a couple friends of mine did this and it opened it up and let it breathe more....it could use appropriate intake mods as well but its only going to make it louder and if your lucky a bit faster
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Old March 4th, 2009, 06:52 PM   #7
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i already got a k&n intake just want a little more rumble to er
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Old March 4th, 2009, 06:53 PM   #8
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Thanks for all the help, im dont know much about diesels
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Old March 4th, 2009, 08:49 PM   #9
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Just noticed something in your first post...you mentioned a DPF delete kit. Only 08+ trucks have DPFs, your truck certainly shouldn't have one.
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Old March 4th, 2009, 08:56 PM   #10
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I did it as well, check out http://farmboysdiesel.com/ I think I got mine for like $330 shipped, 5in turbo back, no muffler. not stainless though.
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Old March 6th, 2009, 09:00 AM   #11
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Yeah im workn on my truck right, and noticed it didnt have the dpf. I know on gas trucks if you run no restrictions and dont have back pressure you will have engine problems. I pulled my muffler off on my diesel and welded the pipe in place. Am i going to have any problems or do diesels work differently?
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Old March 6th, 2009, 09:07 AM   #12
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You won't have any problems, you don't need or want backpressure on any type of engine.
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Old March 6th, 2009, 09:08 AM   #13
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Quote:
Originally Posted by Fordsforever_F250 View Post
Yeah im workn on my truck right, and noticed it didnt have the dpf. I know on gas trucks if you run no restrictions and dont have back pressure you will have engine problems. I pulled my muffler off on my diesel and welded the pipe in place. Am i going to have any problems or do diesels work differently?
your truck is a turbo diesel...the turbo is driven off of exhaust gas. By removing the muffler, you are decreasing the backpressure of the exhaust, which will spool the turbo quicker, which will give you boost faster. In a turbo car, the less resistant the exhaust...the better.
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Old March 7th, 2009, 08:28 AM   #14
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Thanks alot for all the help i got the exhaust done and love the way it sounds
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Old March 7th, 2009, 01:22 PM   #15
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``

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You won't have any problems, you don't need or want backpressure on any type of engine.
Yeh thats a good idea boss 351?
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Old March 8th, 2009, 11:00 AM   #16
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Yeh thats a good idea boss 351?

Not sure what you are getting at, the 4v 351c was a dog down low because of HUGE intake ports and poor cam timing.
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Old March 8th, 2009, 11:05 AM   #17
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Thanks alot for all the help i got the exhaust done and love the way it sounds
Cool.............now if you want to hear your turbo go get a #46637 air filter and install it. Just need a short pc. of 4" pipe to go between the filter and stock intake hose.
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Old March 9th, 2009, 12:42 AM   #18
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Not sure what you are getting at, the 4v 351c was a dog down low because of HUGE intake ports and poor cam timing.
I got an Old Clevor Street Boss 351w
71w block & 73 2v heads. need back pressure to build torque.

Nice 540 cam with 2.5 exh. no headers. torque monster. W/ 2v heads
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Old March 9th, 2009, 09:19 PM   #19
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I got an Old Clevor Street Boss 351w
71w block & 73 2v heads. need back pressure to build torque.

Nice 540 cam with 2.5 exh. no headers. torque monster. W/ 2v heads
Sorry, that is an old myth that refuses to die, if you need to stop up your exhaust to get it to run right you have other problems.

Put a set of long tubes and some open collectors around 18" long, jet accordingly and I promise it would be faster.
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Old March 10th, 2009, 06:43 PM   #20
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DO IT!!!!!
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