Go Back   iRV2 Forums > POWER TRAIN GARAGE FORUMS > Caterpillar Engine Forum
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
 
Thread Tools Search this Thread Display Modes
 
Old 11-06-2011, 07:50 PM   #1
Junior Member
 
EL_Carlson's Avatar
 
Winnebago Owners Club
Freightliner Owners Club
Join Date: Apr 2005
Location: Pinehurst, Idaho
Posts: 25
C-7 350 HP Best Replacement Air Filter

I have a Winnebago 2005 Journey36G with 8,500 miles that I am doing a major service do age not miles, want to replace the air filter. Is there an upgrade high flow replacement air filter? The Filters I have looked at are:
Racor P?N 114880-003
Farr AH 1197
Donaldson P537454
Parker 114880003
Wix 46748
I presently get about 7.7 miles / Gal would like to improve if possible, any suggestions would be help full.

Thank you for any help.
__________________

__________________
EL_Carlson 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 11-07-2011, 08:14 AM   #2
Senior Member
 
Join Date: Jul 2011
Posts: 729
That's a list of good filters. I have become a fan of Wix in the last couple years. I don't know if they are better than the others listed. I don't think there will be much difference in mileage between a new filter of one brand vs. a new filter of another brand. If you really want to increase your mileage, you might look elsewhere:

1. Stay out of the left lane and do 55 in the slow lane.
2. Make sure your tire pressures are in spec for the weight you are carrying.
3. Use a mpg gage like is contained in one of the OBDII gage clusters. It will train you how to drive to reduce fuel consumption.
4. Cut down on the weight of stuff in your RV by removing excess.
5. Realize that there is a limit to the mpg you will get. You are not likely to get what a Prius gets no matter what you do.
__________________

__________________
2004 Tiffin Allegro 27.5 ft. P32 18,000 lb GVW. 8.1 liter. Workhorse chassis built May 2002. 18,668 miles. 2012 Jeep Liberty Toad. RVi2 brake unit.
Full.Monte is online now   Reply With Quote
Old 11-07-2011, 09:31 AM   #3
Senior Member
 
MaverickBBD's Avatar
 
Winnebago Owners Club
Freightliner Owners Club
Join Date: Aug 2006
Location: Formerly of Washington State
Posts: 1,134
You might want to check out aFe (Advance Flow Engineering) air filters. Remember more air in is only half the equation. The other part is air(gas) out. You might want to up size your exhaust and replace that baffled muffler that Cat put on to slow the exhaust when they were still in the "on the road" race chasing exhaust emissions.
__________________
Tom, Cheryl & Blossom(coonhound mix) Formerly of Bellingham,WA'05 Winnebago Journey 36G. FL-XC, Cat 350, aero muffler, AFE filter, 4 FSD Koni's, ultra track bell, SafeT+, FMCA397030, WIT 129107
MaverickBBD is offline   Reply With Quote
Old 11-07-2011, 05:50 PM   #4
Senior Member
 
doorguy's Avatar


 
Winnebago Owners Club
Join Date: Mar 2011
Location: Fairfield, CA
Posts: 391
Hello El_Carlson. Post #3 refers to the upgraded muffler being an Aero 5050XL. Thru his guidance and 1ciderdog's, I decided to go this route myself.
1ciderdog gave me all the part #'s, i.e., elbow, clamps, etc. The OEM muffler is 36" long and about 12" in diameter. The new one is 30" long and 7" dia. It really does make a difference in low end performance and increases hp and torque. If you install it yourself(it isn't that difficult) you can do it for about $250 in materials. If you have someone do it, one quote I had was $750 and they were marking up the muffler over 100%. Then you can decide if the AFE air filter is next. I haven't done the filter yet, because I replaced it in Jan with an OEM filter and it should last two years. Good luck, sir!
__________________
Barry & Sue Miller(extended RVer's, 6 mos + per/year)
04 Journey 39K, C-7, 330, towing: 02 Dakota 4X or 06 CR-V, Aero 5050XL, Road King Shocks
doorguy is offline   Reply With Quote
Old 11-07-2011, 06:09 PM   #5
Senior Member
 
lwasouth's Avatar
 
Winnebago Owners Club
Join Date: Oct 2008
Posts: 180
Air filter caution

I would not recommend and after marker free breathing filter. They just let more dirt in your engine. Actually changing your OEM FILTER TOO OFTEN LETS MORE DIRT IN. The filter becomes more efficient at cleaning the air into your engine after a few hours of use. I agree with the exhaust 5050XL
with the resonator and if you want to go all the way the MP8 tuner at 15%. I did both of these and increased mileage from 7.1 original 16,000 miles to an average of 8.4 on a 15,000 mile trip
__________________
lwasouth is offline   Reply With Quote
Old 11-07-2011, 06:13 PM   #6
Senior Member
 
lwasouth's Avatar
 
Winnebago Owners Club
Join Date: Oct 2008
Posts: 180
Air filter caution

I would not recommend an after marker free breathing filter. They just let more dirt in your engine. Actually changing your OEM FILTER TOO OFTEN LETS MORE DIRT IN. The filter becomes more efficient at cleaning the air into your engine after a few hours of use. I agree with the exhaust 5050XL
with the resonator and if you want to go all the way the MP8 tuner at 15%. (half way on the dial) I did both of these and increased mileage from 7.1 original 16,000 miles to an average of 8.4 on a 15,000 mile trip
__________________
lwasouth is offline   Reply With Quote
Old 11-09-2011, 07:10 PM   #7
Senior Member
 
rver98's Avatar
 
Tiffin Owners Club
Freightliner Owners Club
Join Date: Dec 2010
Posts: 265
To be honest with you the MP-8 and Aero Muffler were the best mods I made to our MH. Low end torque and a quicker response from a start made a huge improvement. The AFE filter was the last upgrade and I have not really noticed much of a difference.

Good luck on your decision
__________________
05 Tiffin Phaeton 40 QDH Cat 350+
MP-8, Aero Muffler, AFE Filter, Ready Brake Elite, HHR LT Toad
rver98 is offline   Reply With Quote
Old 11-09-2011, 08:04 PM   #8
Senior Member
 
rvjimmy's Avatar
 
Newmar Owners Club
Freightliner Owners Club
Join Date: Mar 2011
Location: Almond, Wisconsin
Posts: 1,361
Go with the Aero muffler it doesn't pay to put more air in if it can't get out. Put a 5050XL on mine and it really did make a difference. It's a bit louder but it now sounds like a big boy instead of a puss boy.
__________________
2002 Newmar Dutch Star DP3569 330 CAT - Toad 2007 Saturn Ion. DW Navigator, Work to travel and everything revolves around the price of diesel.
rvjimmy is offline   Reply With Quote
Old 11-10-2011, 08:05 PM   #9
Senior Member
 
Join Date: Oct 2010
Posts: 399
Does anyone know if installing the 5050XL and/or the MP8 changes the emissions? In Colorado we have to do an annual smog check. Thanks.
__________________
Poptop is online now   Reply With Quote
Old 11-11-2011, 11:10 AM   #10
Senior Member
 
sandcar361's Avatar
 
Fleetwood Owners Club
Freightliner Owners Club
Join Date: Aug 2010
Location: Phoenix, Arizona
Posts: 113
They didn't say anything to me here in Arizona last month when I went through emissions. Mine is an 2006 so that might have something to do with it.
__________________
2006 Fleetwood Excursion 39S w/350 CAT
sandcar361 is offline   Reply With Quote
Old 11-11-2011, 12:30 PM   #11
Senior Member
 
Join Date: Jul 2010
Posts: 153
The only time you should change the air filter on a diesel is when the gauge tells you to. On tractor's (commercial trucks) they have the air restrictor gauge inside the cab so the driver can properly watch it. What is recommended on motorhomes is WHEN the gauge reaches your limit to reset the gauge and drive the coach to make sure it really is pulling that hard of vacuum and if it is indeed, then change the filter at that time. Over changing your air filter on a diesel will cause way more damage to your engine then overdriving with a dirty/plugged filter. It is correct that it takes a certain amount of dirt in a new filter until it starts preforming, and while it’s in that stage it’s unknown how much dirt passes thru and enters the engine. Some seminar’s I’ve been to form different engine manufactures will start out saying it takes a cup of dirt to dust a motor, whether it’s a cup today or a cup over 20 years.

I’ve seen too many motors dusted over the years, we only use factory replacement filters (normally ECO, Fleetguard, Donaldson, etc..) I don’t like any of the lifetime K&N type filters, how do you know you got enough oil on it after cleaning or too much? Most of the coaches we’ve seen with dusted motors are from a fitting between the engine and the filter coming apart and letting unfiltered air (DIRT) into the motor. BUT, some have been from the owner changing his air filter every year for the past 7-8 years or from putting in the K&N type and not cleaning / re-oiling correctly.
__________________
InfinityJim is offline   Reply With Quote
Old 11-15-2011, 04:36 PM   #12
Senior Member
 
rver98's Avatar
 
Tiffin Owners Club
Freightliner Owners Club
Join Date: Dec 2010
Posts: 265
Quote:
Originally Posted by InfinityJim View Post
The only time you should change the air filter on a diesel is when the gauge tells you to. On tractor's (commercial trucks) they have the air restrictor gauge inside the cab so the driver can properly watch it. What is recommended on motorhomes is WHEN the gauge reaches your limit to reset the gauge and drive the coach to make sure it really is pulling that hard of vacuum and if it is indeed, then change the filter at that time. Over changing your air filter on a diesel will cause way more damage to your engine then overdriving with a dirty/plugged filter. It is correct that it takes a certain amount of dirt in a new filter until it starts preforming, and while itís in that stage itís unknown how much dirt passes thru and enters the engine. Some seminarís Iíve been to form different engine manufactures will start out saying it takes a cup of dirt to dust a motor, whether itís a cup today or a cup over 20 years.

Iíve seen too many motors dusted over the years, we only use factory replacement filters (normally ECO, Fleetguard, Donaldson, etc..) I donít like any of the lifetime K&N type filters, how do you know you got enough oil on it after cleaning or too much? Most of the coaches weíve seen with dusted motors are from a fitting between the engine and the filter coming apart and letting unfiltered air (DIRT) into the motor. BUT, some have been from the owner changing his air filter every year for the past 7-8 years or from putting in the K&N type and not cleaning / re-oiling correctly.
The AFE is a dry type filter. Soap and water only for cleaning and air dry. No oil applied.
__________________
05 Tiffin Phaeton 40 QDH Cat 350+
MP-8, Aero Muffler, AFE Filter, Ready Brake Elite, HHR LT Toad
rver98 is offline   Reply With Quote
Old 11-16-2011, 07:58 AM   #13
Senior Member
 
Join Date: Jan 2008
Location: Richland Wa.
Posts: 107
Would you all do the same upgrade mp-8 and aero muffler to a c-9? And if so what # areo muffler would you use?
__________________
07 Alpine 36 sdds
MKelley is offline   Reply With Quote
Old 11-16-2011, 06:46 PM   #14
Senior Member
 
rver98's Avatar
 
Tiffin Owners Club
Freightliner Owners Club
Join Date: Dec 2010
Posts: 265
Quote:
Originally Posted by MKelley View Post
Would you all do the same upgrade mp-8 and aero muffler to a c-9? And if so what # areo muffler would you use?

The Aero Muffler would be the same #5050XL (5" exhaust). Since you have a C9 CAT which already produces 1200lbs. of torque, the MP-8 will produce too much torque for the Allison MH3000. The muffler would be a good upgrade!

Good luck
__________________

__________________
05 Tiffin Phaeton 40 QDH Cat 350+
MP-8, Aero Muffler, AFE Filter, Ready Brake Elite, HHR LT Toad
rver98 is offline   Reply With Quote
Reply

Tags
replacement



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
Journey 36G Engine Air Filter Installation SteveG Winnebago Industries Owner's Forum 19 10-27-2012 06:43 PM
Check Your Air Filter! gmfryer Alpine Coach Forum 8 11-20-2009 01:44 PM
C7 Air filter replacement bill jones Winnebago Industries Owner's Forum 7 11-05-2005 02:23 PM


All times are GMT -6. The time now is 05:53 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2014, vBulletin Solutions, Inc.