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02-19-2017, 01:21 PM
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#1
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Junior Member
Join Date: Oct 2015
Posts: 20
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Up grading air filter
We have a 98 newmar 40'MADP on a Spartan MM with a cummins Isc 325hp. Currently it has a Donaldson 537447 air filter and I would like some of your thoughts on other options like K&N,AMSOIL and others. I like being able to replace the filter only and not the whole thing but I am probly missing something. Thanks for your help.
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02-19-2017, 02:46 PM
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#2
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Senior Member
Damon Owners Club
Join Date: Jul 2010
Location: Annapolis,MD
Posts: 1,458
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I would not call either one an "upgrade".
I'd stick with the Donaldson or Fleetguard. K&N, for example,
claims higher air flow, but the unmentioned secret is that it
does not filter as well. I've seen test results showing K&N is
only 96-98% as effective. I know nothing about Amsoil filters,
and have never heard of anyone using them.
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02-19-2017, 02:58 PM
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#3
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Moderator Emeritus
Monaco Owners Club Texas Boomers Club
Join Date: Nov 2015
Location: Central Texas
Posts: 13,426
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I'd stick with the original paper filter and change it every three years. That's not a whole lot of effort, doesn't cost an arm and a leg, and is what the manufacturer designed.
__________________
Dennis and Katherine
2000 Monaco Dynasty
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02-19-2017, 04:19 PM
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#4
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Senior Member
Join Date: Jun 2012
Location: AB
Posts: 7,587
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Quote:
Originally Posted by barmcd
I'd stick with the original paper filter and change it every three years. That's not a whole lot of effort, doesn't cost an arm and a leg, and is what the manufacturer designed.
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Great minds think alike.
Neither of the OP's options would be considered an upgrade. Downgrade if anything.
https://www.donaldson.com/en-us/engi.../cleaners.html
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2019 Unity LTV CB, pushed by a 2013 Honda CRV, BlueOx Baseplate, Aventa Bar & Patriot Brake
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02-19-2017, 05:00 PM
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#5
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Senior Member
National RV Owners Club
Join Date: Feb 2012
Location: Spokane Valley, Wa
Posts: 1,987
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The standard filtering for a diesel is 99% out of the box and new. Neither of the filters you mentioned meet that requirement. You run the risk of dusting the engine and that
will for sure set your bank account on fire.
__________________
Art
1999 Trade Winds 7371 Cat 3126B w/current upgrades
1990 D 250 Dodge Ram Cummins Turbo
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02-19-2017, 05:23 PM
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#6
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Senior Member
Join Date: Sep 2015
Location: Urbanna, VA
Posts: 1,154
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I agree with what has been mentioned above. I tried running K&N on my light trucks and went back to original paper filters. I would not dream of running one on my motorhome. What the manufacturer specs is what goes on there.
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02-20-2017, 08:34 AM
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#7
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Senior Member
Join Date: Sep 2010
Posts: 4,505
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This issue seems to come up a number of times each year. We have a 04 Essex with a 500 ISM and have used a AFE air filter much like a K&N over 10 years ago and over 120K miles and I am glad I did. I taught Auto Tech for 14 years and one of my students is in charge of the school district bus barn with over 100 school buses who when 1st filter replacement he put K&N filter on and has for over 20 years. If using a paper filter when they get wet the glue covers apart and filter goes into turbo. If running a paper filter Cummins recommends replacement at least ever 2 years. There was a 2 psi turbo boost increase with AFE air filter. Make your own choice t there is a lot of negative stories out there on air filter. Have them on all cars and trucks too.
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02-20-2017, 08:40 AM
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#8
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Senior Member
Texas Boomers Club Holiday Rambler Owners Club
Join Date: Jun 2002
Location: What? Like right now? ;-)
Posts: 1,302
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Even on gas engines I have some concerns about oiled filter elements. They still allow sand and dust to get in after the oil begins to evaporate. I have had a oil element on a turbo BMW for 115K miles and while it did add performance (the motor is not stock), it probably causes the oil to get dirty faster. Not worth the pay off on a low RPM motor like a diesel and maybe not even a low RPM gas pulling motor.
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2003 Scepter 40PDBB - Roadmaster RR8S - Cummins ISC350 - purch aug16
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02-20-2017, 10:37 AM
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#9
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Senior Member
Join Date: Nov 2009
Location: Warren, Oregon
Posts: 2,559
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When I upgraded my Donaldson, I went with the Donaldson Blue plus Free Shipping (Donaldson DN-EAF5069)
Aftermarket Truck Parts
2 stroker
__________________
2006 Country Coach Inspire 360 40ft Genoa Designer Series, Samsung 197 RR
Cat C9--STEEL & COPPER Bolt Together Radiator w/ updated rubber mounting
SilverLeaf 330 Magnum 2812 PSW 2011 Ford Edge Sport-Air Force One
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02-25-2017, 10:04 PM
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#10
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,593
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__________________
2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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02-25-2017, 10:24 PM
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#11
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Senior Member
Fleetwood Owners Club Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 15,749
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Quote:
Originally Posted by barmcd
I'd stick with the original paper filter and change it every three years. That's not a whole lot of effort, doesn't cost an arm and a leg, and is what the manufacturer designed.
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Ditto. The damage that can be done by poor or incorrect filtering is huge vs. little to no performance or financial gain. IMHO.
__________________
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
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02-26-2017, 08:54 AM
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#12
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Senior Member
National RV Owners Club
Join Date: Feb 2012
Location: Spokane Valley, Wa
Posts: 1,987
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It would be interesting to know what the filter minder gauge indicates on a new filter in Mr Boatman's unit. Without knowing what the vacuum on a hard pull is there is no way to determin if in fact there is a problem or not.
As to increases in mileage and or performance there are many factors involved and seldom one single factor is the answer.
__________________
Art
1999 Trade Winds 7371 Cat 3126B w/current upgrades
1990 D 250 Dodge Ram Cummins Turbo
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02-26-2017, 09:48 AM
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#13
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Senior Member
National RV Owners Club
Join Date: Feb 2012
Location: Spokane Valley, Wa
Posts: 1,987
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The P537447 is a canister type of filter and the element can not be changed the whole thing is replaced with a new filter. It has just under 1000 CFM rating which is more than your engine will need even at full RPM.
__________________
Art
1999 Trade Winds 7371 Cat 3126B w/current upgrades
1990 D 250 Dodge Ram Cummins Turbo
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