Keep the Cat? - Ford Powerstroke Diesel Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 9 Old 05-28-2011, 08:50 AM Thread Starter
Member
 
Jasun26's Avatar
 
Join Date: Apr 2011
Location: Hood River
Posts: 43
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Exclamation Keep the Catalytic converter?

Hello. I'm looking at a diamond eyes turbo back system for my 6.0L and wondering if I should keep the cat or not. Will keeping the cat negate the advantages of the 4" system? I don't live in emissions testing area. I'm not a tree hugger, but I am concerned about the environment...

Last edited by Jasun26; 05-28-2011 at 09:23 AM. Reason: update title
Jasun26 is offline  
post #2 of 9 Old 05-28-2011, 10:48 AM
Compression Ignition Addict
 
dazdillenger's Avatar
 
Join Date: Feb 2011
Location: upstate ny
Posts: 2,254
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 3 Times in 3 Posts
Feedback Score: 7 reviews
get rid of the cat. I fail to see the point in a 4" exhaust if it necks down to 3" in one area.
dazdillenger is offline  
post #3 of 9 Old 05-28-2011, 10:57 AM
Compression Ignition Addict
 
Join Date: May 2011
Location: Valparaiso
Posts: 534
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 3
Thanked 3 Times in 3 Posts
Feedback Score: 0 reviews
Will removing the cats help to get better mpg? Im thinking it should.

Last edited by SharkDiver; 05-28-2011 at 12:19 PM.
SharkDiver is offline  
post #4 of 9 Old 05-28-2011, 11:47 AM
Compression Ignition Addict
 
Join Date: Oct 2010
Location: Deerfield, VA
Posts: 434
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 8
Thanked 11 Times in 11 Posts
Feedback Score: 0 reviews
I was on the fence deleting my cat, most people have reported no difference in MPG with a Cat delete, so my feeling is why bother.

John

2004 F-250 XLT- FX4 - 4X4, Supercab, 8' bed, BRIGHT RED, Flint Gray Interior, 6.0 Torqshift
Sinister EGR Delete
Rotella ELC
Gutted throttle body
Coolant filter
Stator delete
Blue spring, 6.4 banjos
NChornet CCV mod
Rotella 5W-40 T-6 oil, Motorcraft filters
EDGE CTS monitor
DELTAJOHN is offline  
post #5 of 9 Old 05-28-2011, 12:11 PM
Powerstroke.org Rookie
 
NebularChameleon's Avatar
 
Join Date: Mar 2011
Location: Spring
Posts: 12
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I just took my cat off last night and was suprised to see how restrictive it was. I was preping for my new exhaust and after looking, I think that I will be leaving it out. Found out that diesel trucks are not emission tested in my area! ROCK.
NebularChameleon is offline  
post #6 of 9 Old 05-28-2011, 12:12 PM
Serving Our Country!
 
howell_jd's Avatar
 
Join Date: Apr 2010
Location: Clinton, MS
Posts: 637
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 6 Times in 5 Posts
Feedback Score: 0 reviews
If you EVER intend to sell your truck and you have deleted your catalytic converter from the truck's exhaust you will be committing a federal-level fraud in passing the truck off as street legal.

At the very least be forewarned of the potential consequence of this off-road emissions modification and keep the catalytic converter capable of being reinstalled with a delete pipe.

You will pollute more with the deletion of catalytic converter and you will relieve a bit of back pressure - both are true statements. There is no reason for the presence or lack of presence of the catalytic converter to affect fuel economy unless you have a "poisoned" catalytic converter - which would require replacement to provide the reduction of oxides of nitrogen and other pollutants...if it were obstructing exhaust flow then there is likely something wrong earlier in the combustion process like excess fuelling or incomplete combustion (perhaps an indicator of piston ring wear...lack of compression anyway).

Jonathan

P.S. I have a 4" turbo back stainless exhaust with an aftermarket - smaller than stock - catalytic converter from Magnaflow...probably not definitively street legal but I can put a stock catalytic converter back on the truck - I'm never selling my truck anyway. The original owner hollowed out the stock catalytic converter but as it has a 3" restriction I did opt for a full 4" passage...my wife is very sensitive to the exhaust so a catalytic converter of some sort is definitely a must. Just providing full disclosure with my earlier observation.

Jonathan D. Howell
Lieutenant Colonel, U.S. Army

2005 EarthRoamer XV-LT (Ford F550)
"Americans Travelling America"

Last edited by howell_jd; 05-28-2011 at 12:17 PM. Reason: Full disclosure
howell_jd is offline  
post #7 of 9 Old 05-28-2011, 04:04 PM Thread Starter
Member
 
Jasun26's Avatar
 
Join Date: Apr 2011
Location: Hood River
Posts: 43
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 everyone for your response. I have decided to stay with my cat in my exhaust system. I don't think it will hurt MPG enough to justify added pollution.

BTY Thank you for your service MAJ Howell...
13year ex Army here.
Jasun26 is offline  
post #8 of 9 Old 05-28-2011, 04:23 PM
Super Moderator


 
PGreenSVT's Avatar
 
Join Date: Mar 2008
Location: Abingdon, Md.
Posts: 11,991
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 4
Thanked 45 Times in 18 Posts
Feedback Score: 3 reviews
It is really easy to make it so the cat can be bolted in and out as needed. It is very restrictive and while you might not see a big change in fuel mileage you will see a drop in egt's with it gone.
PGreenSVT is offline  
post #9 of 9 Old 05-28-2011, 04:40 PM
Powerstroke.org Fanatic
 
PowerSmoke07's Avatar
 
Join Date: Jul 2009
Location: Oxnard, CA
Posts: 133
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
If you really don't want the cat, I would love to have one. I live in the emission Nazi state...CA. We might be able to work something out as far as payment and shipping if you decide to
PowerSmoke07 is offline  
Reply

Tags
catalytic converter

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