K&N and Cummins TD

imthedude · 11-03-2009, 02:54 PM

About to do some maintenance on my truck - fuel and air filters, differential and transfer case fluids, etc. Thinking of putting in a K&N filter - not an intake mod. just a filter to replace the Mopar one that's probably in there. Thought I remembered reading somewhere that Cummins recommends against the K&N. Anyone else recall this?

I like the K&N's if for no other reason because they're a lifetime investment. They pay for themselves after about three changes of a normal filter, so it's a no-brainer from a cost standpoint. Has anyone else that's gone w/ a K&N filter noticed any gains in fuel mileage? That was the biggest thing I noticed when I popped in a K&N in my last truck. Just curious.

__________________
2003 White 2500 5.9L CTD QC SB 4wd Auto 3.73

GILL · 11-03-2009, 04:04 PM

I had a K&N drop in and I might have gotten a little better fuel economy but not much. As for power, not really. I have the filter still if you want it you can have it, just pay shipping

__________________
2006 Ram 3500 SRW Custom exhaust, custom intake, Quad X2

simplysmn · 11-03-2009, 04:21 PM

Running a K N is a bozo no no for our truck's it suck's the oil into turbo

__________________
2008 quadcab long bed Patriot Blue 2500 6.7 with 6 sp auto all the bell's and goodies

Sold 1985 crewcab longbed 4x4 with 93 running gear :thumbsup

bansheeair · 11-03-2009, 04:48 PM

Minimal mpg's and power gains, sure can hear the turbo whistle now though.

Quote:

Originally Posted by simplysmn

Running a K N is a bozo no no for our truck's it suck's the oil into turbo

I haven't had a problem with mine. I checked the blades and such, no oil at all. I am a minimalist though and let it fully dry before putting it back in the truck. Is there a intake system that doesn't use an oil on their filters?

__________________
06 3500 QC LB 4x4, 5.9, 6 speed, Smarty, AFE Stage 2, Flexalite fans, Autometer Pyro and Boost, 4" lift w/35's.

**SmokinTheHippies** · 11-03-2009, 04:49 PM

i had a K*N on mine and noticed alot of crap making it thru the filter as well as oil.
switched to a better filter, but i know AEM & AFE both offer dryflows, i'm sure others as well.

__________________
2002 2500 HO 6 spd 4x4 -433HP- Feb '09 ROTM. Gone to new home!
Thanks Holland Court Diesel!
In search of my next Pig.

http://www.youtube.com/watch?v=axAEF...=youtube_gdata
...."your half a maaaaannn!"

right_on · 11-03-2009, 04:56 PM

Quadzilla teamed up with AFE and they have a dry filter out. I have heard many people killing their turbos with the k&n because of the k&n filters letting too much trash through. IT'S A MUCH BETTER INVESTMENT TO ORDER A COMPLETE KIT

__________________
2003 2500 4 Door 4x4 Laramie, Quadzilla Monster Air Intake, Pusher Intake Manifold, Quadzilla XZT 3 Setting 140hp Module, Boost Fooler, Siliencer Ring Out, Straight pipe With 5in Tip

***meadh8*** · 11-03-2009, 04:59 PM

Quote:

Originally Posted by bansheeair

Minimal mpg's and power gains, sure can hear the turbo whistle now though.

I haven't had a problem with mine. I checked the blades and such, no oil at all. I am a minimalist though and let it fully dry before putting it back in the truck. Is there a intake system that doesn't use an oil on their filters?

probably a million different kinds...

__________________
'07 6.7L 2500 SB 4x4 4"TBE XRTHD175ATTFASS 150ISSPRO EV2's
14.50 @ 94.2mph 1/4
Texas Trophy Trucks
918-520-2669 or 713-249-6049

***meadh8*** · 11-03-2009, 05:02 PM

Quote:

Originally Posted by right_on

Quadzilla teamed up with AFE and they have a dry filter out. I have heard many people killing their turbos with the k&n because of the k&n filters letting too much trash through. IT'S A MUCH BETTER INVESTMENT TO ORDER A COMPLETE KIT

no its not. you gain no power. you gain no MPG. ive taked to many many cummins techs and they say the worst thing you can do for longevity of your motor is to put an aftermarket system in. if you bought a cummins for its legandary longevity then put a drop in in. like the S&B. mine fits so snugly that i struggle to get it in. aftermarket systems do not fit together like the factory system does. it has many rubber fittings and things wedge together, instead of these parallel fittings that are just held together by hose clamps.

check out the joints on your stock set up and how it fits together versus a k and n kit, or s and b kit or AFE...aem...so on

__________________
'07 6.7L 2500 SB 4x4 4"TBE XRTHD175ATTFASS 150ISSPRO EV2's
14.50 @ 94.2mph 1/4
Texas Trophy Trucks
918-520-2669 or 713-249-6049

***nfd538*** · 11-03-2009, 05:04 PM

Quote:

Originally Posted by bansheeair

Is there a intake system that doesn't use an oil on their filters?

Yes, AMSoil Injen with nano filter

__________________
2005 Cummins 2500 quad cab Laramie
*Smarty s06 Revo - Banks 6 gun w/ speed loader (for sale)
*AMS Injen air intake - Aero 4040xl
*Autometer Phantom II gauges
*18x9 XD Badlands on 33x12.50 Toyos - Airdog 150
*397hp 777tq with Banks only

***Carl Irvin*** · 11-03-2009, 05:19 PM

Really !

I just got red of my 1999 2500 it had a K&N on it the whole time I had it. I got it with it. It had close to 300,000 miles on it when it went away running great. Never a problem. I had no comparison though. I also have a 95 Cummins with the K&N also came with it.

Now I have a 2005 that didn’t come with it, so I figure I put one on it and I did and had never heard anything bad on it till now. I feel like I waisted my money now maybe?

When I purchased it, they didn’t give it to me it coast more than I liked. I never reset the air restriction indicator on my 99 ever and don’t know if the 95 has one.

Anyway on the 2005 the filter was pretty clean but the button released the mechanism when I pushed it showing me it had restriction. So naturally I put a K&N on it.

The oil never hurt my other turbo.

Now my question here is so to know weather to get the K&n out of there or keep it.

To me the exhaust goes over the turbine which is connected to the compressor for lack of better word using jet engine theory. The turbine and compressor are connected by a shaft with the turbine bearing supporting this shaft. This bearing is oiled by engine oil pressure. And the intake air never crosses the turbine

As the compressor sucks air through the filter powered by the turbine spinning off exhaust gas. It sends this air to the intake via the cooler at the radiator not over the turbine. This oil would never get to the turbines of the turbo and the compressor is a stainless and I inspected mine regularly and have never found any oil on this and I use plenty when I clean my filter.

So my question is..

Is my theory wrong here as I don’t have a cut away turbo I can see or is the oil damaging the Cummins engine by going in the intake of the engine?

What was said by Cummins that discourages the K&N filter to be used?

Help me decide to keep my filter or not.

Thanks
Carl

bansheeair · 11-03-2009, 05:22 PM

I too, feel like I may have wasted some money but I still have the entire stock system. I guess I will do some more reading but in the meantime make a switch over and move the K&N over to the sled tonight as the BHAF will slide right on the tubing.

__________________
06 3500 QC LB 4x4, 5.9, 6 speed, Smarty, AFE Stage 2, Flexalite fans, Autometer Pyro and Boost, 4" lift w/35's.

Last edited by bansheeair : 11-03-2009 at 05:31 PM.

imthedude · 11-03-2009, 05:34 PM

wow! what a great debate this caused. i just talked to the dodge dealership that is doing some service on my truck today. the head tech. said that the drop in k&n's are fine and are a good investment for the cummins engine. opinions are like @$$holes - everybody has 'em, so i'm sure i'll get more than one on that thought too.

__________________
2003 White 2500 5.9L CTD QC SB 4wd Auto 3.73

11-03-2009, 02:54 PM	#1 (permalink)
imthedude Cummins Fan Join Date: Jul 2009 Location: fort collins, co Posts: 34 Thanks: 0 Thanked 0 Times in 0 Posts imthedude's Truck Pics	K&N and Cummins TD About to do some maintenance on my truck - fuel and air filters, differential and transfer case fluids, etc. Thinking of putting in a K&N filter - not an intake mod. just a filter to replace the Mopar one that's probably in there. Thought I remembered reading somewhere that Cummins recommends against the K&N. Anyone else recall this? I like the K&N's if for no other reason because they're a lifetime investment. They pay for themselves after about three changes of a normal filter, so it's a no-brainer from a cost standpoint. Has anyone else that's gone w/ a K&N filter noticed any gains in fuel mileage? That was the biggest thing I noticed when I popped in a K&N in my last truck. Just curious. __________________ 2003 White 2500 5.9L CTD QC SB 4wd Auto 3.73

11-03-2009, 04:04 PM	#2 (permalink)
GILL Newbie Join Date: Aug 2008 Location: Anchorage Ak Posts: 6 Thanks: 0 Thanked 0 Times in 0 Posts GILL's Truck Pics	K&n I had a K&N drop in and I might have gotten a little better fuel economy but not much. As for power, not really. I have the filter still if you want it you can have it, just pay shipping __________________ 2006 Ram 3500 SRW Custom exhaust, custom intake, Quad X2

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11-03-2009, 04:21 PM	#3 (permalink)
simplysmn Cummins Enthusiast Join Date: Oct 2007 Location: Aple Valley Ca Posts: 292 Thanks: 0 Thanked 4 Times in 4 Posts simplysmn's Truck Pics	Running a K N is a bozo no no for our truck's it suck's the oil into turbo __________________ 2008 quadcab long bed Patriot Blue 2500 6.7 with 6 sp auto all the bell's and goodies Sold 1985 crewcab longbed 4x4 with 93 running gear :thumbsup

11-03-2009, 04:49 PM	#5 (permalink)
SmokinTheHippies Northern CA Chapter VP Join Date: Mar 2008 Location: Sunnyale CA Posts: 3,875 Thanks: 365 Thanked 79 Times in 58 Posts SmokinTheHippies's Truck Pics	i had a KN on mine and noticed alot of crap making it thru the filter as well as oil. switched to a better filter, but i know AEM & AFE both offer dryflows, i'm sure others as well. __________________ 2002 2500 HO 6 spd 4x4 -433HP- Feb '09 ROTM. Gone to new home!* Thanks Holland Court Diesel! In search of my next Pig. *http://www.youtube.com/watch?v=axAEF...=youtube_gdata* ...."your half a maaaaannn!"

11-03-2009, 04:56 PM	#6 (permalink)
right_on Cummins Fanatic Join Date: Oct 2009 Location: Ft.Worth, Texas Posts: 146 Thanks: 1 Thanked 6 Times in 6 Posts right_on's Truck Pics	Quadzilla teamed up with AFE and they have a dry filter out. I have heard many people killing their turbos with the k&n because of the k&n filters letting too much trash through. IT'S A MUCH BETTER INVESTMENT TO ORDER A COMPLETE KIT __________________ 2003 2500 4 Door 4x4 Laramie, Quadzilla Monster Air Intake, Pusher Intake Manifold, Quadzilla XZT 3 Setting 140hp Module, Boost Fooler, Siliencer Ring Out, Straight pipe With 5in Tip

11-03-2009, 05:19 PM	#10 (permalink)
*Carl Irvin* Cummins Fan Join Date: Jul 2009 Posts: 50 Thanks: 5 Thanked 2 Times in 2 Posts Carl Irvin's Truck Pics	Really ! I just got red of my 1999 2500 it had a K&N on it the whole time I had it. I got it with it. It had close to 300,000 miles on it when it went away running great. Never a problem. I had no comparison though. I also have a 95 Cummins with the K&N also came with it. Now I have a 2005 that didn’t come with it, so I figure I put one on it and I did and had never heard anything bad on it till now. I feel like I waisted my money now maybe? When I purchased it, they didn’t give it to me it coast more than I liked. I never reset the air restriction indicator on my 99 ever and don’t know if the 95 has one. Anyway on the 2005 the filter was pretty clean but the button released the mechanism when I pushed it showing me it had restriction. So naturally I put a K&N on it. The oil never hurt my other turbo. Now my question here is so to know weather to get the K&n out of there or keep it. To me the exhaust goes over the turbine which is connected to the compressor for lack of better word using jet engine theory. The turbine and compressor are connected by a shaft with the turbine bearing supporting this shaft. This bearing is oiled by engine oil pressure. And the intake air never crosses the turbine As the compressor sucks air through the filter powered by the turbine spinning off exhaust gas. It sends this air to the intake via the cooler at the radiator not over the turbine. This oil would never get to the turbines of the turbo and the compressor is a stainless and I inspected mine regularly and have never found any oil on this and I use plenty when I clean my filter. So my question is.. Is my theory wrong here as I don’t have a cut away turbo I can see or is the oil damaging the Cummins engine by going in the intake of the engine? What was said by Cummins that discourages the K&N filter to be used? Help me decide to keep my filter or not. Thanks Carl

11-03-2009, 05:22 PM	#11 (permalink)
bansheeair Newbie Join Date: Oct 2008 Posts: 26 Thanks: 1 Thanked 1 Time in 1 Post bansheeair's Truck Pics	I too, feel like I may have wasted some money but I still have the entire stock system. I guess I will do some more reading but in the meantime make a switch over and move the K&N over to the sled tonight as the BHAF will slide right on the tubing. __________________ 06 3500 QC LB 4x4, 5.9, 6 speed, Smarty, AFE Stage 2, Flexalite fans, Autometer Pyro and Boost, 4" lift w/35's. Last edited by bansheeair : 11-03-2009 at 05:31 PM.

11-03-2009, 05:34 PM	#12 (permalink)
imthedude Cummins Fan Join Date: Jul 2009 Location: fort collins, co Posts: 34 Thanks: 0 Thanked 0 Times in 0 Posts imthedude's Truck Pics	wow! what a great debate this caused. i just talked to the dodge dealership that is doing some service on my truck today. the head tech. said that the drop in k&n's are fine and are a good investment for the cummins engine. opinions are like @$$holes - everybody has 'em, so i'm sure i'll get more than one on that thought too. __________________ 2003 White 2500 5.9L CTD QC SB 4wd Auto 3.73