Upgraded Downpipe only - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

 
LinkBack Thread Tools Display Modes
post #1 of 7 Old 01-06-2012, 02:45 AM Thread Starter
Compression Ignition Addict
 
Wed Turner's Avatar
 
Join Date: Dec 2011
Location: Fayetteville, GA
Posts: 983
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Upgraded Downpipe only

Has anyone ever just upgraded the downpipe and not the entire exhaust system on their truck? If so, did you see lower EGT's or any other benefit?

I put an exhaust on our last family hauler and did it wrong making it too loud. If I make things louder in the Excursion at all my wife will probably leave me. I figure there could be an advantage to just changing out the downpipe, but wondered if anyone else had gone this route.

2003 Excursion Limited 6.0 2wd
Transmission built by Ace Transmission Repair / ECM tunning by Quick Tricks / FICM tunning by Power Hungry Performance / No Limit Fabrication Coldside Intercooler Kit / Performance Machine MFG EGR Delete / Performance Machine MFG Coolant Filter / GoGo Diesel direct clutch solenoid / AFE Stage II Intake / Ford Blue Spring / 6.4 Banjo Bolts / Zoodad / 1.5" front sway bar by Hellwig / Ford 30mm rear sway bar
Wed Turner is offline  
post #2 of 7 Old 01-06-2012, 05:56 AM
Member

 
LIL' MIKE's Avatar
 
Join Date: Dec 2011
Location: Mississippi Guld Coast
Posts: 73
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Im no TECH but i see it as the EGTs drop due to the increased exhaust flow. If you dont enlarge the entirer exhaust your just creating a funnel.
Hopefully someone smarter then me can back me up on this!

06' F250 CCSW FX4
8" Superlift Custom painted
38" Nitto Mud Grapplers on 20s
CTS w/EGT expandable
SCT X3 by Quick Tricks "GONE LOONEY!"
5" Diamondeye turbo back straight pipe
EGR delete
New oil cooler
CAT EC-1 coolant
Coolant Filter
6.4 Banjo bolts
Blue Spring
COMING SOON
38" NITTO TRAIL GRAPPLERS on 24X14" AMERICAN FORCE
LIL' MIKE is offline  
post #3 of 7 Old 01-06-2012, 07:49 AM
N.S.D.Q.


 
HeavyAssault's Avatar
 
Join Date: Oct 2007
Location: Middle VA
Posts: 4,870
Thanks: 26
Thanked 93 Times in 82 Posts
Mentioned: 0 Post(s)
Quoted: 65 Post(s)
Feedback Score: 3 reviews
It will feel like you lost power but the powerband will shift higher in the RPMs. It's worth it to help EGTs so pick your poison. I'd get the MBRP downpipe, if you want to delete the cat the MBRP cat delete pipe will fit right in easily.


Officially The Biggest Midget In The Game
(In support of Zmann's request)

HeavyAssault is offline  
post #4 of 7 Old 01-06-2012, 09:13 AM Thread Starter
Compression Ignition Addict
 
Wed Turner's Avatar
 
Join Date: Dec 2011
Location: Fayetteville, GA
Posts: 983
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
I've seen a lot of very scientific studies and commentary about exhausts. Basically saying that as the exhaust moves away from the engine it cools off and becomes more dense and requires less space. They went on to suggest that making the exhaust pipe slightly smaller as it gets further from the engine would actually help maintain good airflow because of the cooling effect. I have seen at least one very respected performance company, Saleen, use this theory on some of their exhaust systems. I'm not sure I completely buy into it though. I understand how it would cool and take up less space, but I don't understand how making the pipe smaller down stream would help maintain peak flow.

Sent from my DROID2 using AutoGuide.Com Free

2003 Excursion Limited 6.0 2wd
Transmission built by Ace Transmission Repair / ECM tunning by Quick Tricks / FICM tunning by Power Hungry Performance / No Limit Fabrication Coldside Intercooler Kit / Performance Machine MFG EGR Delete / Performance Machine MFG Coolant Filter / GoGo Diesel direct clutch solenoid / AFE Stage II Intake / Ford Blue Spring / 6.4 Banjo Bolts / Zoodad / 1.5" front sway bar by Hellwig / Ford 30mm rear sway bar
Wed Turner is offline  
post #5 of 7 Old 01-06-2012, 11:02 AM
Compression Ignition Addict
 
smokersteve's Avatar
 
Join Date: Nov 2008
Location: California
Posts: 4,337
Thanks: 0
Thanked 7 Times in 7 Posts
Mentioned: 0 Post(s)
Quoted: 19 Post(s)
Feedback Score: 0 reviews
If you are keeping your stock exhaust, cat and muffler, I do not see a benefit with getting a bigger down pipe. The down pipe is 3" and 3.5" after the flange.

If you have delete pipes and you want a full 3.5" system. I also dont see as much as a benefit since the DP's go for $120+ If you like the idea of bigger sized exhaust, get a 4" system from Performance truck products. they have them cheap and good quality.
smokersteve is offline  
post #6 of 7 Old 01-07-2012, 12:31 PM
Compression Ignition Addict
 
Join Date: Jan 2012
Location: Fallon, Nv
Posts: 2,403
Thanks: 54
Thanked 11 Times in 10 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
When you get the larger down pipe, it's going to delete the resonantor, then the fun starts! I run a 3.5 dp and 4" straight pipe, no cat, no muffler, no problem. It's only loud when I stomp on it. I realize you have an Excursion, but I doubt it would be that loud straight piped. My wife likes how my Souper Doody sounds.

Karl and his 2003 6.0

Barefoot Accelerator Pedal
TRICO Force wiper blades
Yellow Military Aircraft Valve Stem Caps
Offensive "Stick Family" Decal
Big Ol'Honkin 1 1/4" Shank Receiver Hitch


WHAT!?! I was trying to list stuff that everyone else
hasn't already listed for their truck!




Karls03 is offline  
post #7 of 7 Old 01-07-2012, 05:33 PM
Powerstroke.org Sponsor
 
MWilbur516's Avatar
 
Join Date: Feb 2011
Location: Dallas, GA
Posts: 5,820
Thanks: 81
Thanked 146 Times in 94 Posts
Mentioned: 2 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
The 03's had a smaller (2 3/4") foil wrapped down pipe that sucks. Get a MBRP 3.5" DP and delete the cat and muffler, you'll love it and it won't be much louder than stock at all.

Matt | 2006 F250 XL FX4 6.0L 485RWHP and 968RWlbs-ft
Vision Diesel Performance503-487-6074
http://www.visiondieselperformance.com/
https://www.facebook.com/VisionDieselPerformance
BULLET PROOF DIESEL 1-888-967-6653
TWISTED TRANSMISSION Contact me for a quote on a trans with the best warranty in the business.
MWilbur516 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome