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1994.5 - 1997 7.3L Power Stroke Diesel  

down pipe problems

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Old Jun 23, 2008 | 03:45 PM
  #1  
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down pipe problems

just installed a 2 piece 3" down pipe on a 97 F-250. went in pretty easy, striaght pipe from there back. now i have a terrible noise and some vibration. if you put it to the floor it staightens right out no noise no vibration. any suggestions? got me bumfuzzeld
 
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Old Jun 23, 2008 | 03:57 PM
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sounds like its rubbing. its not uncommon to have to do a little trimming for these to fit.
 
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Old Jun 23, 2008 | 04:22 PM
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thanks Epd444

thanks
 
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Old Jun 23, 2008 | 04:35 PM
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I agree it's rubbing, but dont trim your firewall! bend it
Just stick a 2x4 in there and lever it back a bit.
 
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Old Jun 23, 2008 | 04:48 PM
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thank you all the pipe was not rubbing but the clamp between the two pieces had moved up against the tranny, moved it down bout a half inch and viola it was all good, by the way do i need some back pressure on my exhaust?
 
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Old Jun 23, 2008 | 04:54 PM
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From: Ft Scott
Originally Posted by secondarychaos
I agree it's rubbing, but dont trim your firewall! bend it
Just stick a 2x4 in there and lever it back a bit.
X2

Just be carefull! The fuel fitting is on the back of the head and it wont take much to snap it off.
 
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Old Jun 23, 2008 | 04:56 PM
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From: Grass Valley, CA
Originally Posted by 1poorboy69
thank you all the pipe was not rubbing but the clamp between the two pieces had moved up against the tranny, moved it down bout a half inch and viola it was all good, by the way do i need some back pressure on my exhaust?
Your turbocharger will provide all the backpressure you need.
less backpressure behind that = more boost, more power, lower egts...
putting an exhaust on a turbo diesel is different than a gasser...
 
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Old Jun 24, 2008 | 06:48 AM
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X2 you don't need any backpressure after the turbo. As a matter of fact you can run a small stack about 3-4 inches right out the top of the hood if you want to.
 
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Old Jun 24, 2008 | 11:09 AM
  #9  
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secondarychaos
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Originally Posted by Neal 97 250
X2 you don't need any backpressure after the turbo. As a matter of fact you can run a small stack about 3-4 inches right out the top of the hood if you want to.
out of curiosity, is that street legal??? lol
 
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Old Jun 24, 2008 | 01:35 PM
  #10  
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Originally Posted by secondarychaos
out of curiosity, is that street legal??? lol
i really doubt it. i think your local cops would have a ball writing you those tickets...... it would be cool tho
 
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Old Jun 24, 2008 | 01:42 PM
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ya i dont think so either. even if it was, i think the guy at the end of the road would call in noise complaints...
 
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