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Old Apr 21, 2009 | 10:42 PM
  #1  
jmmartin's Avatar
jmmartin
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From: woodville, tx
exhaust

ok, i am at some point this week going to get my exhaust changed out from the y back. plan on leaving manifold and y alone and my q is, will going to 3" make a difference? guy at the muffler shop says that the only difference is the few dollars more in the price, will make no breathability difference since the feed size is not changing. I know i have a slight restriction in it as it is now from the cherry red spot about a foot past the y, and i am hearing a slight ticking noise from a hole that is begining. ok, i'll shut up now, 2.5 or 3?
 
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Old Apr 21, 2009 | 10:51 PM
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From: Faibanks Ak.
I would go 3 if it was me. I dont know how much difference it will make if you split the y and go duals it is very noticable.
 
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Old Apr 21, 2009 | 10:55 PM
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George D.
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Cherry red spot in the exhaust? I would put a pyro on my shoping list if i were you. I'd go with the 3"
 
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Old Apr 21, 2009 | 11:07 PM
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If you split the exhaust before the "Y" does everything improve? Like milage and power? Why would there be a red spot in JM's pipe?
 
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Old Apr 21, 2009 | 11:29 PM
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Festus Hagen
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I would go with 3" at the Y, not after or go with duals.

He is basically correct in the fact that it is already choked at the Y.

Cutting into the Y and custom fitting the 3" takes more time than mosts shops are willing spend. And I would go bigger than 3" if I was going to goto all that trouble.

With the N/A especially the less the restriction going in and coming out the better!

-Enjoy
fh : )_~
 
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Old Apr 21, 2009 | 11:30 PM
  #6  
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d, it looks like the pipe and muffler are original. it sat soaking in hurricane Ike for a day or so so there is no telling what may have washed into it
 
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Old Apr 21, 2009 | 11:31 PM
  #7  
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Originally Posted by dyoungen
If you split the exhaust before the "Y" does everything improve? Like milage and power? Why would there be a red spot in JM's pipe?
im guessing way too much fuel if he is getting a red spot,thats not good at all.i would put a pyro on and turn the fuel down or slap a turbo in.but pyro asap!!!!it could be causing serious internal damage.
 
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Old Apr 21, 2009 | 11:32 PM
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I'd have to imagine a 3" past the Y would be better. Think about it like a drain. ......Say you've got two 3" drains that dump into a 3" drain. If those two 3" drains were being filled to the max, and trying to efficiently flow through a single 3" drain, they would back up. However, if they dumped into a 5" drain, you would get rid of that water much quicker.

I think directly past the Y, right where the two dump, would really be the only way to go if you're looking for any difference. I'm thinking pretty soon, I'm gonna run 3" at the junction of the Y, ad a silencer, and just dump it out the side to save money. It will probably sound like a boat.
 
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Old Apr 21, 2009 | 11:34 PM
  #9  
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hmmm.what would happen if i cut the cross-over pipe off and left it like that?
 
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Old Apr 21, 2009 | 11:44 PM
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RupeJosh
You would be wearing hearing aids in a short time!

The IDI is extremely noisy.

[edit]
Sorry didn't see you had a turbo, it'll be quiter then NON turbo but still loud.
[/edit]

-Enjoy
fh : )_~
 

Last edited by Festus Hagen; Apr 21, 2009 at 11:47 PM. Reason: Added: Sorry didn't see you had a turbo, it'll be quiter then NON turbo.
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Old Apr 21, 2009 | 11:45 PM
  #11  
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From: back in SE Iowa
Originally Posted by Festus Hagen
RupeJosh
You would be wearing hearing aids in a short time!

The IDI is extremely noisy.

-Enjoy
fh : )_~
lol ya i know!!!!i have it stright piped already.do you thing cutting off another 4 feet or so would make that big of difference.my exhaust comes out in front of the tire now.
 
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Old Apr 22, 2009 | 12:11 AM
  #12  
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Floor board is gonna get warm.
 
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Old Apr 22, 2009 | 12:23 AM
  #13  
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Originally Posted by starmilt
Floor board is gonna get warm.
i could put on turn downs..........?
 
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Old Apr 22, 2009 | 12:33 AM
  #14  
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Most states, if not all, require the exhaust to exit behind the drivers compartment.

-Enjoy
fh : )_~
 
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Old Apr 22, 2009 | 06:32 PM
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From: Las vegas
If you cut out the cross oc=ver on a turbo motor you would have no boost. The crossover takes exaust from the drivers manifold to a colector that merges both into the up pipe that feeds the turbo.

Mines straight piped and if i roll the windows up i can barely hear the motor turn the radio on and cant hear the motor.
 
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