Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > THE CHASSIS CLUB FORUMS > Freightliner Motorhome Chassis Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 08-15-2014, 07:57 PM   #1
Senior Member
 
Join Date: Nov 2012
Location: So Cal
Posts: 701
Cummins muffler elimination

I have a 2004 Cross Country with a 5.9 300hp Cummins. I believe this is the ISB. I have seen posts about removing mufflers and installing straight pipe. I am wondering if my engine is one that would benefit from the straight exhaust.

Thanks, Terry
Terry W is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 08-15-2014, 08:05 PM   #2
KIX
Senior Member
 
KIX's Avatar
 
Join Date: Dec 2006
Location: St. Augustine, FL
Posts: 3,595
Yes, your ISB will benefit
__________________
KIX
'02 Ultimate Advantage 40J Spartan MM - Cummins ISC
2013 Jeep Rubicon JK Unlimited
KIX is offline   Reply With Quote
Old 08-15-2014, 08:13 PM   #3
Senior Member
 
Freightliner Owners Club
Join Date: Mar 2002
Location: Western WA
Posts: 1,288
Before you do anything, check to see if you have a "straight through" muffler already installed. A recent straight pipe thread had me wondering too so I checked and found Freightliner installed a straight through muffler during manufacture so no need to consider anything on mine. Measure the distance from the tip of the exhaust outlet to the down pipe turn just before the muffler inlet and shove a length of fish tape up the pipe to see how far it will go. You may already be "straight piped" too.
__________________
'07 Winnebago Journey 34H, ISB-02, MH2500
Toad - '08 Ford Taurus X
Blue Ox, Aventa
US Gear UBS
FleetMan is offline   Reply With Quote
Old 08-15-2014, 08:16 PM   #4
Senior Member
 
FIRE UP's Avatar


 
Join Date: Dec 2009
Location: Out there, somewhere
Posts: 8,994
Terry,
Well Sir, first off, in my basic opinion, if I were you, I'd call a Cummins service center or, cruise around on line, for Cummins Diesel pickups. I'm sure there's a dozen or so. There's forums for everything now days. If anyone's got info on how to "hot rod" Cummins engines, it would be them. One more place to call is, Gale Banks Engineering.

You see, Cummins allows for Banks Kits to be installed on their engines, unlike CAT, who does not and, there's no "kits" for it. I have a very good friend who has a '99 Fleetwood Discovery and it has the 275HP Cummins in it and, he installed a Banks kit several years ago. That coach is pretty hard to keep up with. He's real happy with that kit. Our coach is an '04 Itasca Horizon, 36GD with the C-7 330HP CAT and, I cannot keep up with him on grades. He pulls away quite easily.

Anyway, as for a straight pipe, I can't help you on that. I removed my big-a$$ muffler and installed an Aero 5050XL, Stainless Steel, straight through muffler and, I can tell you, it maid almost no difference at all except for the fact that it's about 30% louder now which, I hate. So, your choice Bud.
Scott
__________________
2004 ITASCA HORIZON 36GD, 2011 GMC Sierra 1500 4x4 Toad '18 Honda Africa Twin Adventure Sports DCT
Retired-29.5 yrs, SDFD, Ham - KI6OND
Me, Karla and the Sophie character, (mini Schnauzer)
FIRE UP is offline   Reply With Quote
Old 08-15-2014, 08:26 PM   #5
Senior Member
 
336muffin's Avatar
 
Join Date: Apr 2011
Posts: 2,569
I would examine what kind of muffler you have. It could be a restricted design. Only way is to look into it. There are mufflers available with very little restriction. I run a Aero 5050 pure stainless steel. This means a 5in inlet with a 5in outlet. I bought mine on Ebay for a little over $120.00 delivered. I have a Caterpillar with good response, hard pulling with slightly better boost pressures now. Haven't noticed any better fuel mileage, but thats not what I was looking for.
__________________
American Tradition 42R-Cadillac SRX Blue Ox Koni 5050XL MCD Scangauge D Samsung rf197
Fulltime since 2012
336muffin is offline   Reply With Quote
Reply

Tags
cummins



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Jamestown Engine Plant Celebrates Anniversary with Cummins DriVer RV Industry Press 0 08-09-2014 08:26 PM
Cummins ISX Achieves 10.7 MPG in Latest Test DriVer RV Industry Press 0 02-18-2014 11:44 AM
Cummins Supports Gvnmt Efforts to Develop GHG Standards for Medium and HD Vehicles DriVer RV Industry Press 0 02-18-2014 11:40 AM
Cummins 2.8L TD Engine Powers Concept Vehicle DriVer RV Industry Press 1 02-06-2014 09:55 AM
Cummins Celebrates production of 1.5M Engines at Jamestown Plant DriVer RV Industry Press 0 08-15-2013 08:17 PM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 06:19 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.