Gains from going to a 4" exhaust from a 3" - Ford Powerstroke Diesel Forum

 
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post #1 of 4 Old 01-05-2008, 08:13 AM Thread Starter
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Gains from going to a 4" exhaust from a 3"

My truck is my tow rig. I have a jeep that I throw tons of money at as the toy and I'm trying to not turn the truck into another toy.

The plans are a DIY tymar intake and then replacing the vaccum hose downpipe with a 3"

So the question is would it be worth the $300 to buy a 4" kit from the downpipe? I'm currently running a 3" exhaust with the cat deleate and when I put this downpipe on I"m going to have my muffler man take the muffler off as well so it'll be straight piped.

I'm thinking that 3" downpipe to a 3" exhaust system straight piped all they way out would be great for my needs and a whole world of difference from what I currently have.


Thanks!!

2000 F-350
7.3L 6spd 71xxx miles
Zero Mods 3/01/2008 - 3/25/08
Zoodad and Foil Delete 3/26/08
DIY Intake 6/25/08
4" TB exhaust 7/01/08
TW 6pos chip 7/27/08
HP oil crossover 7/27/08
'05-'07 Front end conversion 1/8/10

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post #2 of 4 Old 01-05-2008, 08:32 AM
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Yeah you won't be able to fit a 4 inch dp on the OBS. You could go 3 inch to to 3.5 that would be a good setup

2002 F-250 4x4 EC, SRW, SB
Auto 93,000 miles
DP Tuner F5
ATS Compressor and 1.0 Exhaust housing high flow back plate
Turbo Back 4" Silverline Exhaust Mbrp Muffler Delete
Isspro Trans,Pyro,Boost Triple Pod
Fumoto Oil Drain Valve
AIH Delete With Boost Fitting

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post #3 of 4 Old 01-05-2008, 09:10 AM Thread Starter
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Quote:
Originally Posted by vitalidle View Post
Yeah you won't be able to fit a 4 inch dp on the OBS. You could go 3 inch to to 3.5 that would be a good setup
I think I'm just going to do the downpipe.

2000 F-350
7.3L 6spd 71xxx miles
Zero Mods 3/01/2008 - 3/25/08
Zoodad and Foil Delete 3/26/08
DIY Intake 6/25/08
4" TB exhaust 7/01/08
TW 6pos chip 7/27/08
HP oil crossover 7/27/08
'05-'07 Front end conversion 1/8/10

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post #4 of 4 Old 01-05-2008, 09:17 AM
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Yeah thats a good mod for the OBS

2002 F-250 4x4 EC, SRW, SB
Auto 93,000 miles
DP Tuner F5
ATS Compressor and 1.0 Exhaust housing high flow back plate
Turbo Back 4" Silverline Exhaust Mbrp Muffler Delete
Isspro Trans,Pyro,Boost Triple Pod
Fumoto Oil Drain Valve
AIH Delete With Boost Fitting

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