Biggest Size Exhaust for Stock or Stockish Set Up? - Ford Powerstroke Diesel Forum
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post #1 of 34 Old 01-30-2012, 03:44 PM Thread Starter
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Biggest Size Exhaust for Stock or Stockish Set Up?

Well, I want to put a nice cold air intake and get a tuner for my truck, to let it breathe better and get a few hp out of the engine. And I was thinking of having a local exhaust shop build me a straight pipe turbo back exhaust, but I was wondering how big should I go for optimal horsepower gains? Also, what size is the stock exhaust for comparison. Well, thanks.

2001 Ford F250 Super Duty XLT - Extended Cab Long Bed - 7.3L Powerstroke Turbo Diesel - 4x2 - 2005 Headlights - 2005 Chrome Tow Mirrors - Platinum Edition Front Bumper - 22x9.5 Granite Alloy GA7's with 305/44-22 Tires - NAPA Gold 6637 - Foil Removal - 6000k HIDs - Smoked Taillights - Painted Grille
Soon to Come: Wicked Wheel, Tuner, Exhaust, Audio System.

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post #2 of 34 Old 01-30-2012, 05:01 PM
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4" or 5" i dont think you'll be able to clear anything larger than 5" due to firewall restrictions.. also 4 or 5 should be more than plenty to get the hot air away from the engine

Early 99 f250 CCSB,8" lift 38.5's,4" back to 5"stacks
Casserly Stage 1's 165cc,E99 Van Turbo w/ Bd Billet wheel, FRx, HPx,TW Tunes,Glow Shift gauges,6637 Intake, Built 4R100 w/ 6.0 Cooler. Harpoon Hutch Mod, Pre pump filter.
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post #3 of 34 Old 01-30-2012, 05:46 PM
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Stock is 3.5".

A 4" down pipe into a 5" would be plenty. Or even a 4" all the way out. Some say just a muffler delete is sufficient though.

-Cory

Y2K F250 XLT 7.3L ECSB SRW ZF6 4x4



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post #4 of 34 Old 01-30-2012, 06:32 PM
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I have been told that 4" and 5" will flow almost the same just the 5" has a different tone. Just out of curiosity how come you are going to have it custom made? Just don't like the exits available? Because there are a lot of kits out there that would probably be a lot cheaper.

Tim

2001 F-250 Lariat CCSB, 4x4, ZF6 249k, 6.5" Procomp lift, 37" Toyo M/T's, 20" Fuel Hostages. PIS 160/30's, PHP Hydra, 6637, 4" exhaust, Tank mods, ISSPRO's, 08+ mirrors/tailgate/tail lights, M12000 winch.



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post #5 of 34 Old 01-30-2012, 06:34 PM
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I would buy an exhaust from a company before I have an exhaust shop build me a 'custom' exhaust. I brought that up to a local exhaust shop and he was honest with me. By the time he ordered 4" pipe and welded me up an exhaust I could have bought a turbo back kit for way less than he made it.

Tom
2001 F250 7.3 auto 4x4 Lariat CCSB
6637 intake
4" MBRP exhaust
PHP tunes
Foil delete
EBPV delete
ISSPRO Boost, Pyro, and Trans Gauges
Strictly Diesel Pre-Pump Filter/In-Tank Kit
Strictly Diesel Regulated Return and Fuel Bowl Delete
High Flow Banjo Bolts
Nitto AT's 305/70R16
2009 Pontiac G8 GT
Intake, Exhaust, Tune
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post #6 of 34 Old 01-30-2012, 06:34 PM
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By the time and money u pay a shop you could just. Uh a mbrp or diamond eye

2000 F550 DRW. 4x4 manual Trans
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post #7 of 34 Old 01-30-2012, 06:56 PM Thread Starter
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Thanks for all the info guys. Guess I'll look into the MBRP set ups that every one is using. Figured it would be cheaper to have a shop make it, but maybe not. I'll see what I decide to do. Well, thanks again.

2001 Ford F250 Super Duty XLT - Extended Cab Long Bed - 7.3L Powerstroke Turbo Diesel - 4x2 - 2005 Headlights - 2005 Chrome Tow Mirrors - Platinum Edition Front Bumper - 22x9.5 Granite Alloy GA7's with 305/44-22 Tires - NAPA Gold 6637 - Foil Removal - 6000k HIDs - Smoked Taillights - Painted Grille
Soon to Come: Wicked Wheel, Tuner, Exhaust, Audio System.

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post #8 of 34 Old 01-30-2012, 07:07 PM
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I bought mine through XDP. It was just the performance series turbo back kit. Let them know you're a member on here and they give you a discount.

Tom
2001 F250 7.3 auto 4x4 Lariat CCSB
6637 intake
4" MBRP exhaust
PHP tunes
Foil delete
EBPV delete
ISSPRO Boost, Pyro, and Trans Gauges
Strictly Diesel Pre-Pump Filter/In-Tank Kit
Strictly Diesel Regulated Return and Fuel Bowl Delete
High Flow Banjo Bolts
Nitto AT's 305/70R16
2009 Pontiac G8 GT
Intake, Exhaust, Tune
Camaro 20's, Camaro SS Brembo's
1997 VDub Passat GLX VR6
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post #9 of 34 Old 01-30-2012, 07:50 PM Thread Starter
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Thanks for the tip. I am considering getting the 5" straight pipe because I prefer a nice throaty sound and want to be able to hear the turbo better. My last car was a '94 Trans Am with a 350 LT1 and a 6 speed, it had longtube headers, catless y-pipe, and Magnaflow catback.

2001 Ford F250 Super Duty XLT - Extended Cab Long Bed - 7.3L Powerstroke Turbo Diesel - 4x2 - 2005 Headlights - 2005 Chrome Tow Mirrors - Platinum Edition Front Bumper - 22x9.5 Granite Alloy GA7's with 305/44-22 Tires - NAPA Gold 6637 - Foil Removal - 6000k HIDs - Smoked Taillights - Painted Grille
Soon to Come: Wicked Wheel, Tuner, Exhaust, Audio System.

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post #10 of 34 Old 01-30-2012, 09:40 PM
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Quote:
Originally Posted by 2001_F250 View Post
Thanks for the tip. I am considering getting the 5" straight pipe because I prefer a nice throaty sound and want to be able to hear the turbo better. My last car was a '94 Trans Am with a 350 LT1 and a 6 speed, it had longtube headers, catless y-pipe, and Magnaflow catback.
With that setup i'm sure you'll hear more exhaust than turbo. I straight piped my truck stock and it was loud!

I had a 95 S10 with a LT1 in it. Headers and true duals out the back. Had a subtle idle then when you got on it everyone heard it. I know the feeling.

Tom
2001 F250 7.3 auto 4x4 Lariat CCSB
6637 intake
4" MBRP exhaust
PHP tunes
Foil delete
EBPV delete
ISSPRO Boost, Pyro, and Trans Gauges
Strictly Diesel Pre-Pump Filter/In-Tank Kit
Strictly Diesel Regulated Return and Fuel Bowl Delete
High Flow Banjo Bolts
Nitto AT's 305/70R16
2009 Pontiac G8 GT
Intake, Exhaust, Tune
Camaro 20's, Camaro SS Brembo's
1997 VDub Passat GLX VR6
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