andrew-theasby
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| posted on 17/10/10 at 10:45 PM |
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k&n filter power rating
Im looking for a website ive found once before that gives the power rating for each filter they make. Cant seem to find it on knfilters.com just
want to check that a RC-2600 filter will be suitable for my XE. Can anybody help?
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rodgling
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| posted on 17/10/10 at 11:31 PM |
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http://www.greenfilters.com/ list max bhp as well as physical dimensions for all their filters.
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interestedparty
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| posted on 18/10/10 at 05:09 AM |
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Anyone else think it odd that filters tend to be defined by how well they flow, rather than by how well they filter?
As some day it may happen that a victim must be found,
I've got a little list-- I've got a little list
Of society offenders who might well be underground,
And who never would be missed-- who never would be missed!
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franky
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| posted on 18/10/10 at 06:31 AM |
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I guess if they all filter to a given standard then how they flow is what people need to know.
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martylemoo
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| posted on 18/10/10 at 07:23 AM |
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They most certainly do not filter to the same standard.
K+N IMHO are terrible at actual filtering thus giving an increased flow rate over most other filters. In fact in my mind it seems quite simple less
filtering = more flow.
I know its a lot more complicated than that but if you value your engine then I certainly would not be fitting a K+N to it.
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MikeRJ
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| posted on 18/10/10 at 07:31 AM |
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quote:
Originally posted by martylemoo
I know its a lot more complicated than that but if you value your engine then I certainly would not be fitting a K+N to it.
You can say the same about the foam and wire mesh filters, none of them filter as well as paper, but then again paper filters don't flow as well
so have to be physicaly larger.
It's all a compromise, but a clean and properly oiled K&N does filter reasonably effectively. There is a lot of B.S. floating around the
net, and more than one completely bogus test.
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martylemoo
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| posted on 18/10/10 at 07:36 AM |
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Before it drove through a dirty field:-
After:-
Filtered by K+N
[Edited on 18/10/10 by martylemoo]
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robocog
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| posted on 18/10/10 at 07:46 AM |
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Shocked!
That cannot be right surely?
was it oiled and definately no leaks post filter?
Do you have pics of the filter?
Finding it hard to believe as the turbo fins are bent suggesting something bigger than would fit through even an un oiled K&N/s gauze had worked
its way through somehow
Regards
Rob
[Edited on 18/10/10 by robocog]
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martylemoo
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| posted on 18/10/10 at 07:52 AM |
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It was a meticulously prepared Bowler, this is an extreme example granted as we tend not to run our cars through dusty dirty muddy fields but it gives
you an idea of the filtering abilities of the K+N.
The fins are bent as the dust and dirt fucked the shaft and the blades were running off central.
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imp paul
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| posted on 18/10/10 at 08:55 AM |
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i do know that most motor sport people like Clio cup sport and vauxhall opel of turkey all use itg also parma Audi here is a link this mite help
http://www.itgairfilters.com/content2.asp?section=trifoam 
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andrew-theasby
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| posted on 18/10/10 at 11:27 AM |
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Thanks for the replies, itg dont seem to do one under 6" dia i was hoping for a 5". The green ones are looking good at the mo, but i
still cant find the k&n one i was looking for 
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interestedparty
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| posted on 18/10/10 at 11:44 AM |
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quote:
Originally posted by martylemoo
They most certainly do not filter to the same standard.
That was my thinking too, the idea that a filter with a small surface area can flow as well, and filter as well as a large one seems to fly in the
face of common sense.
A filter is basically a screen with lots of holes in it, and particles bigger than the holes can't get through. If you have a smaller surface
area but the same size holes, then it wouldn't flow so well. So if it DOES flow as well, then it strongly suggests that the holes are bigger.
As some day it may happen that a victim must be found,
I've got a little list-- I've got a little list
Of society offenders who might well be underground,
And who never would be missed-- who never would be missed!
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flak monkey
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| posted on 18/10/10 at 12:00 PM |
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The amount of air a filter can flow is both proportional to its area and the porosity of the filter media. Hence why a K&N flows so much air as
its surface area is huge because of the pleats.
A K&N filter will filter reasonably well for a road car, but I prefer the Pipercross foam filters generally. Both if oiled properly will filter to
a good enough level with normal on road use. They need to be cleaned every 5000miles though and properly oiled.
The extreme off road case above isnt a suitable environment for the filter to operate in anyway so is not a good example. Once the filter is clogged
with dust then it will simply suck it through (especially on a forced induction engine). I would have suggested that multistage filtering would have
been a better solution in that case and they should have been cleaned after every run. It strikes me that the filtering system wasnt particularly well
designed - was it modified by Bowler or someone else? Knowing the environment they are designed to run in I would guess it had been modified by
someone else and that design change wasnt thought through. This isnt a dig at you or anyone else, but blaming the filter isnt the right thing to
do.
David
Sera
http://www.motosera.com
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twybrow
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| posted on 18/10/10 at 04:56 PM |
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LCB Thread....
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andrew-theasby
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| posted on 18/10/10 at 10:33 PM |
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found it from that, going with one rated to 269hp, that should be enough room for their over estimating
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