Thanks Thanks:  0
Likes Likes:  0
Results 1 to 27 of 27

Thread: K & N filters

  1. #1
    bearsnack
    Guest

    K & N filters

    I am looking for updated reports on the K & N filters. Has anyone installed any? And how about a performance report? I am interested in the square filters.

  2. #2
    Crash's Avatar
    Join Date
    Apr 2002
    Location
    Nikiski Alaska
    Posts
    2,695
    Post Thanks / Like
    Just an FYI. I used a digital tach checker a couple of weeks ago to check the accuracy of the mechanical tach in my PA-18. The (fairly new) mechanical tach was dead on all the way up... 1800, 2000, 2200, 2400 rpm.

    With the tail tied down, my O-360 turned 2460 rpm, wide open. Leaned it out, it turned 2460 rpm. Took the air filter off, it turned 2460 rpm. With the filter off and leaned out, it turned 2460 rpm. Once the plane gets rolling it will go to 2650-2700. Take care. Crash

  3. #3

    Join Date
    Oct 2003
    Location
    Hometown USA!
    Posts
    592
    Post Thanks / Like
    Verrrrrry Interesting........
    Sam


  4. #4
    Lawn Dart's Avatar
    Join Date
    Apr 2002
    Location
    Las Vegas, Nv
    Posts
    524
    Post Thanks / Like
    Crash, was that the K&N filter or a paper filter?

  5. #5
    Bill Ingerson's Avatar
    Join Date
    Jan 2004
    Location
    Snohomish Washington
    Posts
    1,433
    Post Thanks / Like

    filter

    If that was a round K&N filter Crash, do you have the Number for it?

  6. #6

    Join Date
    Nov 2003
    Location
    Thun Field, Washington
    Posts
    767
    Post Thanks / Like
    delete

  7. #7
    Dave Calkins's Avatar
    Join Date
    Jul 2002
    Location
    Anchorage, Alaska
    Posts
    5,352
    Post Thanks / Like
    With the round-type air filter on a 150HP with an 82-41 I saw no gain using the K&N versus the round paper filter.

  8. #8
    Crash's Avatar
    Join Date
    Apr 2002
    Location
    Nikiski Alaska
    Posts
    2,695
    Post Thanks / Like

    Re: filter

    Quote Originally Posted by Bill Ingerson
    If that was a round K&N filter Crash, do you have the Number for it?
    No, it was the stock round paper filter that comes with the Penn Yan conversion. It is the same filter as the round 150 hp PA-18 but is 7 inches long instead of 9 inches. Crash

  9. #9
    Ruidoso Ron's Avatar
    Join Date
    Oct 2003
    Location
    Alto, NM
    Posts
    1,779
    Post Thanks / Like
    Dough Head, that was a neat filter (non-PMA'd) that you showed us at DVT. Done anything else with it?

  10. #10

    Join Date
    Aug 2002
    Location
    greeley colorado
    Posts
    31
    Post Thanks / Like

    k and n filter

    Installed the k and n in my pa-11 with a c-90. Crusie /climb prop combo. Electronic tach showed a 50 rpm gain in static rpm.(no forward speed at all) Old filter was 2300 static new k and n 2350 static. This is at 5000 ft msl 40 degrees f. Every little bit helps. Bill

  11. #11

    Join Date
    Nov 2004
    Location
    canada
    Posts
    165
    Post Thanks / Like
    what would the k&n part number be for a 1950 PA20 with an 0-290?

    thanks, if you can find it

  12. #12
    Dough Head's Avatar
    Join Date
    Dec 2003
    Location
    4AK6/DVT
    Posts
    249
    Post Thanks / Like
    I made two more filters Ron, but I'm still experimenting with the pleat height trying to make it a little more stiff without having to add expanded metal on the inside. Just haven't had much time to mess with it. I might have to break down and make a mold instead of trying to use the ones we already have. I did get them on the flow bench though, and all three filters, the stock paper, the Bracket and the one I made, all flow within 30 cfm of each other, at around 1280 cfm, about 3 times more than any 4 cylinder Lycoming could ever use. The only thing about the one I made, is that it is washable and filters better than the others.

  13. #13
    bearsnack
    Guest
    I have 10 hrs or so on the K & N square filter. I picked up at least 35 to 40 rpm on initial power up to take off and seem to be getting more on climb out.
    Good product.

  14. #14

    Join Date
    Apr 2005
    Location
    Woodstock , Ontario
    Posts
    223
    Post Thanks / Like
    Hi : I actually fly a Champ, but I like this forum also. Can't afford a SuperCub, but info is valuable to any aviator. The K&N caught my attention , as I have used them for other applications. There is a reason you will get more rpm on a K&N. I read an article about a large mining company trying to save money . The equipment used had two inline air filters installed. The first one had to be continually replaced due to getting full of dirt. The secondary filter was still fairly clean. In order to try and save money, the company decided to try the K&N washable filter on the primary. What they discovered was the secondary filter was now getting full of dirt. Engine oil analysis showed much higher metal content than with the original paper filters. Yes you will get more performance, but if you operate in a dirty conditions, it may not be worth it in the long run.
    Ron

  15. #15
    irishfield's Avatar
    Join Date
    Feb 2003
    Location
    Penetanguishene, Ontario Canada
    Posts
    2,933
    Post Thanks / Like
    Good info Ron !! Long time no hear from ! Cheers, Wayne O'Shea

  16. #16
    Crash's Avatar
    Join Date
    Apr 2002
    Location
    Nikiski Alaska
    Posts
    2,695
    Post Thanks / Like
    Quote Originally Posted by Ron Babos
    Hi : I actually fly a Champ, but I like this forum also. Can't afford a SuperCub, but info is valuable to any aviator. The K&N caught my attention , as I have used them for other applications. There is a reason you will get more rpm on a K&N. I read an article about a large mining company trying to save money . The equipment used had two inline air filters installed. The first one had to be continually replaced due to getting full of dirt. The secondary filter was still fairly clean. In order to try and save money, the company decided to try the K&N washable filter on the primary. What they discovered was the secondary filter was now getting full of dirt. Engine oil analysis showed much higher metal content than with the original paper filters. Yes you will get more performance, but if you operate in a dirty conditions, it may not be worth it in the long run.
    Ron

    Ya, we don't have any dirt or glacier silt in the air here in Alaska to worry about. Guess I'll go out and spend 135 bucks for a K&N to protect my new engine. Crash

  17. #17
    bearsnack
    Guest
    Ron, how did the K & N filter increase the metal content in the oil? Did they happen to have an engine coming apart during this time? How long did they run the filters? Parameters of the test are critical.
    Increased dirt in the intake will show increase in silicone in oil analysis, correct?

  18. #18
    Lawn Dart's Avatar
    Join Date
    Apr 2002
    Location
    Las Vegas, Nv
    Posts
    524
    Post Thanks / Like
    Hi Ron, welcome to the site and glad to have you aboard!

    I think you'll find that the fellows here are real sticklers for info, so please share with us where this info comes from. A link to an article would be nice.

    Not trying to start an argument here but just asking for some more info about how the number one filter for the offroad racing crowd failed in the mining industry.

    Enquiring minds want to know

  19. #19

    Join Date
    Nov 2003
    Location
    Anchorage
    Posts
    837
    Post Thanks / Like
    For me the K&N increased RPM's 15-25 during climbout depending on conditions,load etc, compared to paper. I was using the LEES. If you constrict air on one end, it doesn't do as much good to open it on the other end.
    I ran a K&N air filter in my truck after the last volcano blow. At the time I had an Oberg oil filter with a bypass light inside. The bypass light indicates when the screen is full and needs changing. The K&N would cause the bypass light to go off in about half the time as the paper filters would. They let more go through, no doubt. However, on the practical side, the cub isn't sealed as well as an automotive system, so more is getting through just because it is a cub. Also, the K&N would get absolutely filthy in my truck. After a whole season in my cub it barely looks dirty. Be practical, know your flying conditions and deal with it, I have both, just in case.

  20. #20

    Join Date
    Apr 2005
    Location
    Woodstock , Ontario
    Posts
    223
    Post Thanks / Like
    Bearsnack: The increased metal was caused in effect of the air not filtered as well as it was with the two paper filters. Normally the secondary filter received very little dirt. With the K&N much more dirt got into the secondary filter, requiring it's replacement also. In this case, more dirt will enter the intake system of the engines, which will wear it more and show up in the oil analysis. No filter will take out all the dirt. If it did the engine would not be able to breathe. Oil was checked at the same intervals before and after the K&N installation. That's all I can tell you about it , as I was doing oil filter research at the time and happened to come across the article. If any-one cares, oil filter research showed that Fram sucks, and Wix or Napa (same thing) were the better ones. Again, oil filters will not remove all the dirt, and it's a compromise between flow and filtering action. Any-thing will out perform the screen system for cleaning oil. Ron

  21. #21
    Crash's Avatar
    Join Date
    Apr 2002
    Location
    Nikiski Alaska
    Posts
    2,695
    Post Thanks / Like
    Anyone have the NAPA part number for a PA-18 round filter? Crash

  22. #22

    Join Date
    Apr 2005
    Location
    Woodstock , Ontario
    Posts
    223
    Post Thanks / Like
    Crash:That's what I like about this site, people with a sense of humor. On a previous thread mention of off road racing and mining equipment. Simple, they probably get free filters, or it's monkey see, monkey do, or just whatever it takes to win , as they do breathe better. Mining equipment is exposed to some serious dust, and if I remember correctly, they were spending thousands a month on paper air filters. That's why they tried the K&N. They have their place, just not there, I guess.

  23. #23
    sodak's Avatar
    Join Date
    Oct 2002
    Location
    rochester, mn
    Posts
    282
    Post Thanks / Like
    napa#2220,
    Strangers are friends I have not met yet

  24. #24
    Crash's Avatar
    Join Date
    Apr 2002
    Location
    Nikiski Alaska
    Posts
    2,695
    Post Thanks / Like
    Quote Originally Posted by Ron Babos
    Crash:That's what I like about this site, people with a sense of humor. On a previous thread mention of off road racing and mining equipment. Simple, they probably get free filters, or it's monkey see, monkey do, or just whatever it takes to win , as they do breathe better. Mining equipment is exposed to some serious dust, and if I remember correctly, they were spending thousands a month on paper air filters. That's why they tried the K&N. They have their place, just not there, I guess.
    Now with K&N filters their spending millions $$ on new engines.

    As I said earlier, with a digital tach checker my PA-18 didn't turn up any higher with the filter completely off. So why would sticking a K&N on it help much, other then let a bunch of dirt into the engine. I think some of the RPM guys are claiming is just having a clean filter on the airbox after ten years and a 1,000 hours. Think I'll stick with the NAPA filter at 10 bucks each and change them every 100 hours. Take care. Crash

    P.S. Put a layer of grease around the filter ends to seal it against the airbox and dome when you install it. Old motocross racer trick.

  25. #25
    cubdrvr's Avatar
    Join Date
    Jan 2002
    Location
    YKN(mother city of the dakotas)
    Posts
    1,112
    Post Thanks / Like
    Round filter #'s

    Fram CA122PL
    AC 136C
    WIX 42220
    Purolator AFP 28
    Fram 2220

    What's the K&N #?
    "Sometimes a Cigar is just a Cigar"

  26. #26

    Join Date
    Nov 2003
    Location
    Anchorage
    Posts
    837
    Post Thanks / Like
    What happens when a paper filter gets wet?

  27. #27

    Join Date
    Apr 2005
    Posts
    624
    Post Thanks / Like
    What filter is the best when on floats?

Similar Threads

  1. k&n air filters
    By marc in forum In The News
    Replies: 17
    Last Post: 04-08-2009, 09:51 AM
  2. Oil and air filters
    By Tom in forum Super Cub Sick Bay
    Replies: 9
    Last Post: 11-14-2005, 08:42 PM
  3. air filters
    By Mark Cav in forum Cafe Supercub
    Replies: 36
    Last Post: 09-28-2004, 10:14 AM

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •