K & N Filters

[Les Parker]

Just fitted a new K & N filter to my 95 Def 90, BIG improvement.
Thought you all would like to know.

[TSR53]

Just fitted a new K & N filter to my 95 Def 90, BIG improvement.
Thought you all would like to know.

Yes, when I fitted the K&N replacement filter to my '94 Defender 90 NAS I removed the clipped on trumpet air intake and noticed a huge improvement in throttle response on all rmps. Very nice. Petrol mpgs improved a bit as well. The biggest test was pulling a 1,280lb pop-up camper and fully laden up the backside of Hwy 70 over and past Vail, CO. Worked like a champ .

[Les Parker]

Great!! Good to hear that others have had such a positive improvement by fitting an easy performance enhancement. Keep Rovering!!

[Mike Koch]

K&N filter servicing-don't forget!

K&N filters are great, but don't forget to service them(and let them dry afterwards as to not mess with your V8 EFI airflow sensor).

The Rovers North part number for the service kit is: RNF145

http://www.roversnorth.com/store/p-2491-service-kit-k-n-filter.aspx

Mike

[Erik B]

you can wash them in hot water, then use compressed air to dry them..

[Mike Koch]

recommendations

Looking at the K&N website FAQ(http://www.knfilters.com/faq.htm), using compressed air to dry the filter is not recommended, neither is running one without oiling it first.

Mike

[Rob S]

k&n filters

I have one currently installed in my 94 D-90 (#287 of 1943), and have noticed a nice improvement in HP as well as mileage. Yes, cleaning the filter is very important, good point Mike.

[kellymoe]

I rarely clean mine. The dirtier mine gets the better the filtration is what I have found. I have not noticed any reduction in power with a dirty K&N. I clean it about twice a year.

[TSR53]

I rarely clean mine. The dirtier mine gets the better the filtration is what I have found. I have not noticed any reduction in power with a dirty K&N. I clean it about twice a year.

Good call, yes leaving more 'collected dirt' does add to filtration effects. I do the same with my Audi //S6. This has the turbocharged 20v 5cyl and in some instances TOO much K&N oil is a bad thing = ruined hot wire MAF sensors. Just go easy when cleaning and re-oiling, it only needs a little bit.

[a109]

Just fitted a new K & N filter to my 95 Def 90, BIG improvement.
Thought you all would like to know.

Advice: keep a paper filter to use in dusty conditions. K&N filters are great for some added performance in clear air environments but at a cost to the filtering ability needed in harsh conditions. I found this to my cost.

John

[Leslie]

K&N was designed for track use. If you're on pavement, with a carburetor, it'd be a good way to go. If you're in dusty conditions, or using a vehicle with a hot-wire MAF, it may have unintended negative effects.


Just be educated about the give and take of any changes you may contemplate.

[BarryO]

Advice: keep a paper filter to use in dusty conditions. K&N filters are great for some added performance in clear air environments but at a cost to the filtering ability needed in harsh conditions. I found this to my cost.

I've had the same concerns. 'might be fine for the city folks, but you should see the stuff I shake out of my air filter in the summer, from all the driving on dusty unpaved roads that I do. I've always been leery of "free flowing" air filters as a result. Engineering-wise, there's no free lunch; if the filter lets more air through, it's either got to be alot bigger, or let more dust through as well.

[nosivad_bor]

I have to agree , seems like saying "huge improvement" from an air filter should imply better filtration. when in fact it meant less....

I've had the same concerns. 'might be fine for the city folks, but you should see the stuff I shake out of my air filter in the summer, from all the driving on dusty unpaved roads that I do. I've always been leery of "free flowing" air filters as a result. Engineering-wise, there's no free lunch; if the filter lets more air through, it's either got to be alot bigger, or let more dust through as well.

[thewap]

Running a snorkel helps with dust, and any filter.

[a109]

http://www.duramax-diesel.com/spicer/index.htm

This is report on lab testing of a selection of air filters. K&N doesn't fare well.

John