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Author Topic: Cheap 'Pod' filters - why you shouldn't - Public service posting  (Read 48350 times)

Offline Walms

  • Posts: 397
Cheap 'Pod' filters - why you shouldn't - Public service posting
« Reply #40 on: Feb 07, 2013, 08:15:53 »
The problem with keeping your K&N's on for that length of time is they progressively get plugged up. I wash my UNI's on a regular basis. You'd be surprised by the amount of crap you get out of them after only a month.
If you want your jetting spot on and to stay that way, IMO a washable filter is the way to go...

Offline Maritime

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The problem with keeping your K&N's on for that length of time is they progressively get plugged up. I wash my UNI's on a regular basis. You'd be surprised by the amount of crap you get out of them after only a month.
If you want your jetting spot on and to stay that way, IMO a washable filter is the way to go...


K&N's are washable as well and with the metal mesh, don't fall apart after a lot of washings, they work best with a little dirt, but not too much. I have had one in my nissan for 7 years, washed it 2 times. Had one in a civic that went 12 years and washed 4 times at 60K mile intervals 100K KMs. I have yet to get either for a bike but the CX I am working on now will get either Uni's or K&N depending on the budget, almost bought the cheapo's but with the info here, I am going to one of the 2 name brands.  My GL is destined for an OEM K&N Replacement this spring.
The GL Rebirth: http://www.dotheton.com/forum/index.php?topic=68337.0
CX500 Low budget Bobber : http://www.dotheton.com/forum/index.php?topic=43617.0
"Beer makes you feel the way you ought to feel without beer" -Henry Lawson
"Beer is proof that God loves us and wants us to be happy." - Thomas Jefferson

Offline crazypj

  • Posts: 12487
  • Split personality, I fake being smart
K&N's filter better as they get 'plugged up' (it's in their advertising)
I clean mine whenever I swap bikes  ;D
'you can take my word for it or argue until you find out I'm right'
I gave my girlfriend an orgasm the other night, but, she spat it back at me
 Some humans would do anything to see if it was possible to do it. If you put a large switch in some cave somewhere, with a sign on it saying 'End-of-the-World Switch. PLEASE DO NOT TOUCH', the paint wouldn't even have time to dry
 Itís not worth doing something unless someone, somewhere, would much rather you werenít doing it  (Terry Pratchett)
CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline Walms

  • Posts: 397
Cheap 'Pod' filters - why you shouldn't - Public service posting
« Reply #43 on: Feb 07, 2013, 10:36:11 »
K&N's filter better as they get 'plugged up' (it's in their advertising)


Similar to spray painting a pair of glasses black and calling them efficient sunglasses... :)
I believe this thread got started because of poor flowing air filters... Just sayin. ;)

Offline crazypj

  • Posts: 12487
  • Split personality, I fake being smart
Not poor flow filters, bad design closing off various ports
 K&N still flow more air than stock filters, even when you can't see the wire mesh because of dirt build up.
You know when they are restricting flow as they change shape (and are then scrap)
Cheap pods will distort because of flow restriction even when they are new
'you can take my word for it or argue until you find out I'm right'
I gave my girlfriend an orgasm the other night, but, she spat it back at me
 Some humans would do anything to see if it was possible to do it. If you put a large switch in some cave somewhere, with a sign on it saying 'End-of-the-World Switch. PLEASE DO NOT TOUCH', the paint wouldn't even have time to dry
 Itís not worth doing something unless someone, somewhere, would much rather you werenít doing it  (Terry Pratchett)
CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline Walms

  • Posts: 397
Cheap 'Pod' filters - why you shouldn't - Public service posting
« Reply #45 on: Feb 07, 2013, 12:16:22 »
Ok, we will have to agree to disagree... ;)
My first post on this thread, I mentioned  the requirement to jet up when I made the move from K&N's to UNI's... This is proof enough that the UNI's flow better.
The only negative I've ever heard about UNI's is they look like crap but I can live with that if I get better performance.

I should mention that it is also a known issue with piston port 2 strokes that there is a relationship between the flat back side of the K&N style filters causing tuning difficulties because of the reversion wave bouncing of that plate... This is why allot of triple guys have made the move to a K&N replacement filter for the air box or the UNI's.
This isn't to say they don't work at all, just that it adds another variable to tuning issues.




Offline crazypj

  • Posts: 12487
  • Split personality, I fake being smart
I also have rather a lot of experience with piston port two stroke's (and reed valve Yamaha's plus disc valve Suzuki's)
I've always found Uni's to be slightly more restrictive than K&N, if you had to jet up it's probably due to flow reversion with K&N, as you said, fuel mix bounces off 'back wall' of filter
 I wouldn't use anything but Uni on RD350/400 (air cooled)
the extra length makes a major difference
 Britain had (and still has) less restrictions on two strokes so they were available for a lot longer than in the USA
« Last Edit: Feb 07, 2013, 13:28:03 by crazypj »
'you can take my word for it or argue until you find out I'm right'
I gave my girlfriend an orgasm the other night, but, she spat it back at me
 Some humans would do anything to see if it was possible to do it. If you put a large switch in some cave somewhere, with a sign on it saying 'End-of-the-World Switch. PLEASE DO NOT TOUCH', the paint wouldn't even have time to dry
 Itís not worth doing something unless someone, somewhere, would much rather you werenít doing it  (Terry Pratchett)
CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline Walms

  • Posts: 397
A couple posts up you claimed to swap filters with bikes, now you're telling me that UNI's are more restrictive than K&N's...  ::)
BTW, Both my triple and your RD's have reed valves so there is no reversion wave. ;) The need to jet up is because there is less restriction, just like I need to jet up again to run open carbs.

Offline teazer

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That's not strictly accurate. I know we think that reeds close off and that there can be no reversion wave, but there is.  It's just a heck of a lot smaller than PP 2 smokes. :-)
 

Offline crazypj

  • Posts: 12487
  • Split personality, I fake being smart
A couple posts up you claimed to swap filters with bikes, now you're telling me that UNI's are more restrictive than K&N's...  ::)
BTW, Both my triple and your RD's have reed valves so there is no reversion wave. ;) The need to jet up is because there is less restriction, just like I need to jet up again to run open carbs.

 Nope, I CLEAN filters and swap them onto new bike
 Unless someone specifically want's modified bike I put it back to stock (stock bikes tend to be worth more to the majority of people)
Size for size, Uni's ARE more restrictive, the ones I use are roughly double the length of K&N
 Not my RD's, never had one but worked on hundreds
What triple do you have with a reed set up?
I don't remember it on any of the Suzuki's or Kawasaki's
'you can take my word for it or argue until you find out I'm right'
I gave my girlfriend an orgasm the other night, but, she spat it back at me
 Some humans would do anything to see if it was possible to do it. If you put a large switch in some cave somewhere, with a sign on it saying 'End-of-the-World Switch. PLEASE DO NOT TOUCH', the paint wouldn't even have time to dry
 Itís not worth doing something unless someone, somewhere, would much rather you werenít doing it  (Terry Pratchett)
CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0