[grasshopper7.3]

Is the KN filters for these trucks worth the price. Is there a noticeable fuel mileage or power increase?

Also, today I bought this Purolater air filter that had some cottony like layer on it. I peeled it off because it looked weird. Was it for shipping purposes> No instruction and nothing on their site about it, but now it looks like a filter should.


DM

 

[chuckster57]

I am using a K&N filter and I can't say that it is the only thing that made my mileage better. I did my cowl induction at the same time. It did seem to have better throttle response and my restriction meter (change fiter) doesn't even move any more so I know I am getting good BIG gulps of air. We don't have any sensors in the intake to goof up with the oil. My original filter had the paper element and a foam "insert" also. I have K&N filters on all my vehicles and would recommend them.

 

[RLDSL]

There's a little quicker throttle response with a K&N, but, it's not worth tne engine damage. the things let too much dirt through. By their own admission they let an extra 1% dirt through. It adds up. I lost a turbo compressor wheel to one. I know folks who have lost rings to the things. THey're fun to play with so long as you realize the possible consequenses. If you plan on keeping the thing for the long run, stick with a regular filter..

 

[LMJD]

and my restriction meter (change fiter) doesn't even move any more so I know I am getting good BIG gulps of air.

Me too. With a stock new filter, I'd get a 2-3" reading on my restriction gauge under load pulling a grade. Always zero with a K&N. I've been using a K&N for 180,000 miles now and I find they filter just a well as a paper filter if they are cleaned correctly. Some years back I had just cleaned mine to go on a 2400 mile trip, but I got called to work a forest fire for 14 days. The dust on the logging and fire roads was so thick due to heavy equipment they made it mandatory to run with headlights on. Later I put in my spare K&N and could find no signs of anything getting past the filter anywhere in the intake ducting. It was about as tough a test as a filter could be put through. Every time I read negative opinions about K&N based on "they say" and "I heard" my Crap Detector goes off.

If you plan on keeping the thing for the long run, stick with a regular filter..

So far my "long run" is at 239,000 miles with no internal engine work ever done and I don't burn any more oil today than when I bought the truck new over 16 years ago. K&Ns are OK in my book.

 

[RLDSL]

. Every time I read negative opinions about K&N based on "they say" and "I heard" my Crap Detector goes off.

Wasn't just I heard, was I lost, as in I lost my turbo compressor wheel to a K &N. Best part about that was when the turbo shop called me, he didn't even have to ask me if I had a K&n filter, He TOLD me that I had a K&N filter! He was able to tell by the dust damage pattern to the compressor wheel ! The guy has seen so many of the things torn up the same way he can identify the offending air filter. That pretty well says it. Even K&n if you look at THEIR OWN specifications , they only claim to remove 99 % of the dirt of a factory type element. That 1 % adds up over time. 1% extra dirt is enough over the long run to cause a LOT of damage.

A K&N filter is PERFORMANCE part, it cannot be all things to all people. it will make the truck go quicker, but as in any performance modification, there will be a trade off. If it was the best way to go overall, the factory engineers would have put the things in.
I would not put another one back in my truck, too expensive a rig to risk.

That said, It is a PERFORMANCE product, and I do keep one in my Volvo 940 turbo, knowing full well what I'm doing to the thing, but that darn car is just more fun than a barrell of monkeys when you stand on the throttle every once in a while You play you pay :thumbsup: But I'm realistic about it ( and it's turbo is showing signs of premature wear right now..but I had fun doing it).

 

[LMJD]

Don't know what to tell you. When I pulled my air box and ducting last year my 16 year old turbo impeller still looked like brand new. What could possibly be the reason other guys and I have had no problems?