Exhaust question
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Mountain Pass
Joined: Aug 2008
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Exhaust question
I am considering straight piping my pick up. It has a banks turbo and 3" back to the muffler and 3 1/2" coming out of the muffler. I will I notice any performance gains if I cut the muffler out? How much louder will it be with it being straight piped? Will I see any difference in MPG's by doing this? Thanks in advance for your input.
Logistics Pro
Joined: Sep 2010
Posts: 4,411
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From: Victor, MT
He is right on the turbo part, it does muffle the sound of the engine, i had a straight piped N/A when I got the truck. I hated it, it was incredibly loud and made too much noise. It depends if your muffler is a straight through or not, there are no power differences that i have noticed from what my buddy with the Banks turbo-charged 7.3 says. If you do straight pipe it, i would go with 3.5" all the way back because as we all know the more this engine can breath out the more it can breath in. These trucks love air and there is always someone tinkering with things to figure out how to give them just that. More and more air.
Elder User
Joined: Feb 2010
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I have a straight pipe turbo 7.3, and I think it sounds fine.
As for power gains, I don't think cutting out the muffler will do much, and I don't think going bigger than 3" pipe will give you any extra power either, it'll just make your exhaust sound deeper.
As for power gains, I don't think cutting out the muffler will do much, and I don't think going bigger than 3" pipe will give you any extra power either, it'll just make your exhaust sound deeper.
Cargo Master
Joined: Feb 2010
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From: NY
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Elder User
Joined: Feb 2010
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I can tell you, nothing.
I'm not saying bigger pipe is bad, but 3" is just fine.
I remember when everyone with a diesel truck got huge stacks cause they added so much power
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Postmaster
Joined: Apr 2009
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From: Malahat/Cowichan Valley
my current na setup is the dual three inch off the manifolds to a single 4 inch with a five inch tip as you can see from my sig. It has the straight through muffler so if you want to go striaght piped performance and tone that nasty rattle down at high rpm's, get that muffler. My exhaust will stay the same just that off the down pipe it will go immediately to four inch pipe.
The 5" tip added so much horse power its crazy, highly recommend!!
The 5" tip added so much horse power its crazy, highly recommend!!
Cargo Master
Joined: Feb 2010
Posts: 3,493
Likes: 3
From: NY
When you want to increase fuel and air the the compression housing and still keep EGT's in a good place, you want absolutely no restriction for the DP. I'm not saying to put 5 inch stacks on, just saying when you want to tweak the turbo system for more power, the last thing you want is texhaust to be in the way. So to insure the exhaust will never be a problem, go 3.5 and larger. If you like high EGT's and lower than possible boost, stick with 3inch.
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