KN drop in filter, your experiences?

[bodilx6]

What have you noticed by using a drop-in filter like KN or other third party filters?

 

Louder turbo sucktion sound, more oomph from the BOV or not change?

 

anything else? better mileage or?

[Guest Nurzo]

Lots of dirt and dust on the turbo side of the filter after only 400km of use. I found it to be a piece of crap removed it and sold it for a loss of $100. I now have a TRD, cost me less, and very happy with it.

K&N are rubish and only fit for the bin.

[Guest sunnyG83]

i have a TRD filter for sale in the (suprise suprise) for/sale section

£30.00 delivered and yes i am shameless

[Jim_1979]

Are the aftermarket panel filters any good??

 

I do love the induction kits... ala Apexi etc, but they're not very well rated.

[hadyn]

I had a k&n panel on my old TT. No issues. Got slightly louder induction noise and spool as well as bit more noise from the bov.

I went for a stock filter on my new TT mainly due to Nurzos posts about how bad the k&n is.

[bodilx6]

Really?

 

Whats the difference between the stock filter and the TRD?

-and the TRD and the KN (since the KN is supposed to leak so much

crap)

[mikeyb10supra]

if you insist on using any, the TRD one is probably your best bet, stock paper element even better, as for cones I would'nt even bother, when I eventually get round to going single im going to try and incorporate the induction side into the stock airbox some how..

[TLicense]

Lots of dirt and dust on the turbo side of the filter after only 400km of use. I found it to be a piece of crap removed it and sold it for a loss of $100. I now have a TRD, cost me less, and very happy with it.

K&N are rubish and only fit for the bin.

 

Hmmm. I've used a K&N filter panel for over 3 years and never had any issues....

[michael]

K&N here - all pipework cleaned prior to fitting, back of induction box still spotless, front side filthy.

[Class One]

I had a K&N in my stock airbox for 10k miles with no isues at all. I used to use K&N filters back in my biking days as well with no probs.

 

[Kranz]

Lots of dirt and dust on the turbo side of the filter after only 400km of use. I found it to be a piece of crap removed it and sold it for a loss of $100. I now have a TRD, cost me less, and very happy with it.

K&N are rubish and only fit for the bin.

 

Did you oil it????

 

Without the red oil then there's nothing to stop the dirt getting through the gaps in the cotton weave. Oil makes it swell up, fill the gaps & is super sticky to catch all the dirt particles.

 

I've Used K&N's on Jag XJ220 race engines, Aston Martin DB7, (ok, they weren't my cars exactly) Westfield SEight, Minis, VW 5 cylinder Passat, Jaguar 3.2, Suzuki GSX250, Ford Focus TDCi, Supra...... and never had any problems with dirt entering the engine. Oil analysis to prove it too

[bodilx6]

Ok, that is my experience with my cone filter on my MKIII. That also made a lot of noise

 

So, exept for the cleaning abilities of the 3rd party panel filter for the MKIV, did any of you notice quicker throttle repsonses, change of sound or anything else?

[R Black]

I replaced the standard airbox for a K&N on my previous car (Audi S2), did'nt do any scientific tests, but when it was'nt fouling my MAF, it felt smoother & a bit snappier on a run, also sounded fab IMO, crap on pick up in traffic though, due to heat soak.

[Guest Nurzo]

OK you guys with K&N panel filters. Take the filter out and put a smear of grease on the ducting panel of the air box, replace the filter, then drive around for a few hundred Kms. Then run your finger thru the grease smear and you will see and feel the grit that the grease has picked up then you will be believers. Think to your selves there's a lot of grit in this small smear how much is going into my engine.

Then in the UK it rains so much there's no dust and dirt on the roads. Therefore not needing any filter just a mesh screen to stop small birds and such.

Here in Oz we do have dirt and dust on our roads and K&N filters are crap the same as your cricket team.

[DamanC]

K&N filters are crap the same as your cricket team.

 

 

oh so true

[markjodrell]

I changed my stock filter for another stock, before putting it in I gave the engine a good rev to see how it sounded, brill with no filter, sounded like there was an after market BOV and the great sucking noise.

It made me really tempted to get after market induction, its just that everybody says they are crap on a HOT Supra:(

[dandan]

K+N panel here - no probs.

 

May try the grease trick for interests sake next time I clean and oil the filter....

[Chris and Alana]

the apexi filters (induction kit or element) are supposed to be the best aftermarket air filter for performance increase and filtration. theres a web site I looked at recently that tested ther apexi, HKS, Blitz, K&N and a couple others and the apexi won hands down. However I would think that the stock paper element would be better for filtration but not power (obviously). But after seeing the test results I would use the Apexi (and Iv bought one) but Im not being bias, just what I found on the web and thats what I based my decision on. Hope that helps

[hadyn]

So how does the apexi cone feel to YOU and YOU ONLY Chris?

Does it feel a bit more responsive than the stock airbox?Sluggish? I know it will sound a bit better

[R Black]

OK you guys with K&N panel filters. Take the filter out and put a smear of grease on the ducting panel of the air box, replace the filter, then drive around for a few hundred Kms. Then run your finger thru the grease smear and you will see and feel the grit that the grease has picked up then you will be believers. Think to your selves there's a lot of grit in this small smear how much is going into my engine.

Then in the UK it rains so much there's no dust and dirt on the roads. Therefore not needing any filter just a mesh screen to stop small birds and such.

Here in Oz we do have dirt and dust on our roads and K&N filters are crap the same as your cricket team.

 

 

OUCH (but so true) like your footie team right. I see what your saying, makes sense.

[Konrad]

As you are talking about filters, i will hijack topic for a sec. I have mushroom HKS kit (yes i know, so spare me comments) with green foam filter - should I put anything on this foam filter (oil, whatever) or leave it as it is?

[R Black]

As is.

[ivan]

.... K&N filters are crap the same as your cricket team.

Oh do get real.

 

 

No way are K&N filters that bad!

 

 

 

 

 

 

 

(I've been using a K&N panel for the last year and the engine side of the airbox is clean as a whistle. )

[geoffvalenti]

As you are talking about filters, i will hijack topic for a sec. I have mushroom HKS kit (yes i know, so spare me comments) with green foam filter - should I put anything on this foam filter (oil, whatever) or leave it as it is?

 

I'd put all the other household rubbish on it, once I'd put it in the bin, where it belongs

[Chris and Alana]

So how does the apexi cone feel to YOU and YOU ONLY Chris?

Does it feel a bit more responsive than the stock airbox?Sluggish? I know it will sound a bit better

 

It does feel a bit more responsive, looks great and you can hear the turbo whine a little more also the dump valve is a little louder. Personaly I would think any aftermarket filter is going to be better for performance over stock whether it be an element or open cone, filtration is the only factor really. The Foam types like HKS are supposed to be the worst followed by the stainless steel mesh type like Blitz or powertec. Any cotton type filter should provide excellent filtration qualities (K&N, Green, Apexi) the only difference is that K&N use a 'wet' filter (use oil to help catch particals) and the Apexi is a 'dry' type cotton filter. The negitive od using a wet filter is that the oil used 'can' over time clog sensors which can lead to the ECU picking up wrong signals and messing up the air to fuel ratio etc. their are no disadvantages to a dry filter apart from they may not offer the same filtration properties as the standard paper filter but from what i researched a while ago my mind was put at rest when I found that the apexi filter does filter the air really well and offers a really good performance gain. I find it very good. I'll dry and find a link to the web page but cant promise anything.