Why put exhaust on a 6.4L? - Ford Powerstroke Diesel Forum
User Tag List

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 17 Old 08-22-2013, 11:35 AM Thread Starter
Member
 
wellsit's Avatar
 
Join Date: Oct 2007
Posts: 82
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Why put exhaust on a 6.4L?

So being new to the 6.4, I've been searching and learning a ton of information about these trucks. My H&S race tuner is on order and should be here next week. I plan to delete the EGR and DPF shortly after it arrives.
In looking at exhaust options a couple questions occur to me.

Why are DPF delete pipes so expensive? Is there something special about this section of tubing that will replace the DPP?

Also, if the down pipe and exhaust are 4", why replace with an aftermarket 4"? I understand that some folks like the sound with no muffler and others like the growl from a 5" pipe. But is there a performance reason to replace the stock exhaust with an aftermarket 4" If i tune my truck and put CAI on it, is 4" adequate?

I've searched and I haven't seen these questions addressed yet.

Thanks in advance

08 F350 6.4
H&S Mini Maxx Street
wellsit is offline  
post #2 of 17 Old 08-22-2013, 11:54 AM
Compression Ignition Addict
 
SySx's Avatar
 
Join Date: Feb 2012
Location: Hampton, Virginia
Posts: 427
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 2
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
The down pipe I cut off my truck wasn't 4"and when I installed my exhaust my truck came alive. I didn't buy a dpf delete pipe by itself so I have no input on the price but I did see them in the classified on here for like 100 bucks.

Finally from a phone that fits my hands!

93 Chevy Blazer R.I.P. Baby
03 Ford Lighting 500 hp SOLD
09 Dodge Challenger R/T SOLD
03 Ford F350 Crew Cab 4x4 SOLD
08 Ford F350 CCLB Dually Mini Maxx Race Tuner, Turbo Back Flo Pro 4" straight pipe dual exhaust
SySx is offline  
post #3 of 17 Old 08-22-2013, 11:58 AM
Member
 
RHKA's Avatar
 
Join Date: Apr 2013
Posts: 63
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
You can get away with a 4" exhaust, the difference between 4" and 5" is pretty much just tone, and and as far as changing the 4" down pipe people do it because the factory dp is double walled and restrictive.

2008 F-350 LARIAT CC LB DRW 4x4
6" FABTECH LIFT
22" AMERICAN FORCE RIMS, TOYO OPEN COUNTRY A/T LT325/50R22
SPARTAN TUNER(300 HP TUNE WHEN EMPTY)
5" DIAMOND EYE EXHAUST TURBO BACK
RHKA is offline  
post #4 of 17 Old 08-22-2013, 12:59 PM
Member
 
flashover1969's Avatar
 
Join Date: Oct 2012
Location: Arizona
Posts: 78
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Send a message via Yahoo to flashover1969
The factory downpipe is restrictive because of a crimp if I remember and after the DPF somewhere in the muffler section the pipe goes down to 3 inches. I can't remember exactly, but the stock exhaust is restrictive compared to aftermarket.
Is the tuner you ordered a "race" tuner?
flashover1969 is offline  
post #5 of 17 Old 08-22-2013, 02:44 PM Thread Starter
Member
 
wellsit's Avatar
 
Join Date: Oct 2007
Posts: 82
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Thanks for the replies. I'll have to look at my stock exhaust and see if I can identify where it restricts down to 3" after the DPF. Is replacing the downpipe worth the cost and effort? It sounds like a major pain to do.

Flashover1969 - Yes, I ordered an H&S Mini Maxx that was advertised on Parley's Diesel as being a race unit capable of deleting the EGR and DPF. It better be a race unit since the cost was $1500!

08 F350 6.4
H&S Mini Maxx Street
wellsit is offline  
post #6 of 17 Old 08-22-2013, 03:43 PM
Compression Ignition Addict
 
Join Date: Oct 2010
Location: DAMNED GEORGIA
Posts: 1,525
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 42 Post(s)
Thanks: 14
Thanked 17 Times in 16 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by wellsit View Post
Thanks for the replies. I'll have to look at my stock exhaust and see if I can identify where it restricts down to 3" after the DPF. Is replacing the downpipe worth the cost and effort? It sounds like a major pain to do.
The downpipe is before the DPF. It runs from the turbo to the underside of the truck.

I have never seen an official comparison between a turbo-back and downpipe-back system in terms of replacing the stocker with a 4" downpipe. I went the route of the downpipe back and I'm not looking back...

2015 F350 DRW Platinum, SCT X4, EDGE CTS2, aFe PDS, AirLift 5000 Ultimate & Wireless Air, Lund LED Bull Bar, RC Grille bar, B&W 5th Wheel, Stark LED Lighting
2010 F250, H&S Mini Maxx, aFe PDS, Diamond Eye 4", Pro Comp Nitro 2.5", Bilstein 5100, SmittyBilt Bull Bar, Bushwacker Pocket Style, B&W Slider, Firestone Ride-Rite, Fuel Hostage 20x10, Pioneer/Kicker/JL Audio




RUFFSTUFF is offline  
post #7 of 17 Old 08-22-2013, 04:25 PM
Member
 
RHKA's Avatar
 
Join Date: Apr 2013
Posts: 63
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by wellsit View Post
Thanks for the replies. I'll have to look at my stock exhaust and see if I can identify where it restricts down to 3" after the DPF. Is replacing the downpipe worth the cost and effort? It sounds like a major pain to do.

Flashover1969 - Yes, I ordered an H&S Mini Maxx that was advertised on Parley's Diesel as being a race unit capable of deleting the EGR and DPF. It better be a race unit since the cost was $1500!
It's not to bad you just have to cut the factory dp with a sawzall, and when you see what it looks like cut in half then you'll see why it would be a good idea to change it. The hardest part was lining up the top piece of the 2 piece after market dp to the turbo and putting the clamp on IMO gl.

2008 F-350 LARIAT CC LB DRW 4x4
6" FABTECH LIFT
22" AMERICAN FORCE RIMS, TOYO OPEN COUNTRY A/T LT325/50R22
SPARTAN TUNER(300 HP TUNE WHEN EMPTY)
5" DIAMOND EYE EXHAUST TURBO BACK
RHKA is offline  
post #8 of 17 Old 08-22-2013, 07:37 PM Thread Starter
Member
 
wellsit's Avatar
 
Join Date: Oct 2007
Posts: 82
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
So is putting an aftermarket down pipe a relatively easy job? Aside from being annoying to line things up, is it very difficult to get the 2 piece unit in and connected?

Sent from AutoGuide.com Free App

08 F350 6.4
H&S Mini Maxx Street
wellsit is offline  
post #9 of 17 Old 08-22-2013, 07:48 PM
Compression Ignition Addict
 
Join Date: Oct 2010
Location: DAMNED GEORGIA
Posts: 1,525
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 42 Post(s)
Thanks: 14
Thanked 17 Times in 16 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by wellsit View Post
So is putting an aftermarket down pipe a relatively easy job? Aside from being annoying to line things up, is it very difficult to get the 2 piece unit in and connected?

Sent from AutoGuide.com Free App
As long as you cut the right amount off of the right pieces... Easy job.

2015 F350 DRW Platinum, SCT X4, EDGE CTS2, aFe PDS, AirLift 5000 Ultimate & Wireless Air, Lund LED Bull Bar, RC Grille bar, B&W 5th Wheel, Stark LED Lighting
2010 F250, H&S Mini Maxx, aFe PDS, Diamond Eye 4", Pro Comp Nitro 2.5", Bilstein 5100, SmittyBilt Bull Bar, Bushwacker Pocket Style, B&W Slider, Firestone Ride-Rite, Fuel Hostage 20x10, Pioneer/Kicker/JL Audio




RUFFSTUFF is offline  
post #10 of 17 Old 08-23-2013, 06:40 AM
Compression Ignition Addict
 
XPLOSIV's Avatar
 
Join Date: Oct 2009
Posts: 705
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 2
Thanked 8 Times in 8 Posts
Feedback Score: 0 reviews
I went with the MBRP DP and the directions made it pretty easy. Taking your time and stopping for beer brakes it only takes about a hour. Don't forget to wrap it. Certainly better throttle response IMO.

08 F450 CCLB 4.30's
Spartan, Pure Performance Custom 3", Toyo M608Z, MBRP, FloPro, Banks, Volant, Mishimoto, Dieselsite, LineX, Reese 30k

Last edited by XPLOSIV; 08-23-2013 at 06:40 AM. Reason: wrong dp
XPLOSIV 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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

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