3RotorRocket

Does anyone have the link to where they tested all the intake filters???

seveninphilly

iTrader: (7)

http://www.mkiv.com/techarticles/filters_test/2/

poor_red_neck

Wow.

The HKS filter REALLY sucks.

KingCobraV9

iTrader: (2)

o ya i red that the apexi one kicked everyones ***

3RotorRocket

Thank you sir

boogerboy

i know what my filter will be from now on....

Agent_D

iTrader: (2)

^^ agreed, im buying an apex'i unit asap

Evil Aviator

Not necessarily. That "test" was hardly performed within SAE standards, which is not surprising for an informercial.

Imischeifin

That's Monster.

Thanks for the link, and thanks for the Q

3RotorRocket

Yeah good point but it's accurate enough.

BTW ppl I have the Apexi Power Intake on my fc3s.

I can actually hear my turbo spoolin now.Easy to install just need 2 hose clamps.

Evil Aviator

Those of us with a small sense of professionalism and college degrees in science or engineering generally do not agree with that statement.

Icemark

While I agree to some point, (they probably should have used measured amounts of fine siilcates instead, and then measured the before and after amounts of the silicates), I also believe the test to be accurate enough to make an semi informed purchase from as it backs what real world experience I have seen.

Evil Aviator

Scientifically, that test is totally invalid because the media was not homogenous. Also, the media flow rate and pressure differential were not monitored. Therefore, it is possible, if not probable, that some filters received finer media, more media, or otherwise different media than others. I think that most people would also consider infomercials suspect because the producers are biased.

If you have real world experience testing filters in accordance with SAE J726, then please post the results because I am getting pretty tired of seeing this silly web link used for technical purposes.

marlaman

Smart people make me want to go to Wyotech more everyday. i think i'll head there next fall after i get my 7 paid off. anybody have any expirence out there or good stories for me?

thanx,
Matt

Snrub

iTrader: (1)

Evil, your points are true, but essentially they took a pile of dirt and put in through the filters. The standard deviation in the quanity smaller particles that could be trapped by the second filter used in their test material might vary by lets say 100%. As for the dirt flow rate differences, I can't honestly see it varying all that much. To be ridiculous lets again say 100%. Take a look at those pictures, do you see a 200% difference between the Apexi and HKS? Clearly it's much more than that. If you want to argue between the Apexi and K&N because the test is inaccurate fine, but broad conclusions like "the Apexi filter pulls out more dirt than the HKS" are valid because the test appears to be accurate enough as the uncertainties are not nearly as great as the observed differences.

Agent_D

iTrader: (2)

i agree with snrub, although i dont know the spec's of an SAE test on the filters, the basic idea seems to be relevant, air filters are there to do just that, filter your air so dirt cant get in there, so the basic idea on putting dirt through with a vacuum cleaner seems like it would work decently, and give a brief idea of what air filters do what. as an overall decision, i would go with this test to sway my buying options, but then again if i knew all that was tested in an SAE test, it may be different.

Fritz_X

iTrader: (1)

I'd love to see multiple sources to back this study up so far to me it looks like a bunch of people from Apexi rubbed dirt into the competitions filters and took pictures claiming to be an independent group. When you show a study it is a little more convincing to use numbers, and photograph the test procedure. C'mon if that was a Science Fair project that kid would get an F. Excellent, Poor, Good....

"Umm Jimmy what procedure did you use.?"

"Umm well,....first I took a big kickback from......"

Without another source confirming these results and without actual numbers this test is pure ****. You have no idea in what manner the testing procedure was conveyed and you don't even know what company backed the actual test.

--Fritz

Icemark

tell you what.. if someone wants to send me the 4 filters I will test them with a nice scientific method and verifiable and duplicatable results, and post them here. I have access to clean room test equippment that will show exactly how many particles and of what size make it through each filter.

But I personally think that my tests will show the exactly same results...

Fritz_X

iTrader: (1)

Really Mark? You really think that the quality of the Apexi is that much more than the HKS? Interesting, do you just mean in terms of filtration or also in terms of airflow?

--Fritz

chumma7

unless you have a standalone ems, i think the only thing that really matters in this circumstance is filteration.
Our stock afm's are just so restrictive that little variations in airflow between these brands of filters doesnt really matter... just my intuitive opinion.

Icemark

I mean exactly in terms of both...

I personally have seen the HKS fail in 3 different cars. All directly related to dirt in the filters. When I mean fail, they implode, dumping foam into the intake, or deforming enough to allow dirt into the intake. the first two I could say isolated examples... but the third that failed the same way suggests that these filters are not worth anything if dirty. To top it off the amount of fne dust in the intake tubing on these vehicles suggests that they failed to filter out dirt that they should have.

Now I have never used the apexi (costs too much over the K&N) and just based on my understanding of filters, I have not used stainless steel mesh filters, but I have never seen the dust in the intakes (or a filter that deformed) on any OEM or K&N filter use.

But as Ted points out most of the time the dust and dirt is significantly less than an issue, and I must add that ever single case that I have seen the HKS fail was in a vehicle used off-roading or in track use, but generally what problems that happen on the track and/or off roading will eventually show in street driven vehicles as well.