What To Do Wit Air Filter

[Taso84]

Need to either clean or replace my air filter, atm i got a HKS mushroom one on that is really dirty, but i heard it isnt too good and i should jus scrap it and buy a new apexi style one.

Wat do u guys reckon, should i jus clean the mushroom one or buy a new apexi style one.

P.S. is there any difference b/w buying a real apexi or a fake $40 one that they sell at autobahn?

[MANWHORE]

just clean it. I've cleaned mine like 100 times and it's still fine.

kn fitler kit - like $20, or about $25 at autobarn

[kingy_06]

suppose its up to you, if you have the extra coin id go for the apexi, though cleaning them works fine as well...cleaned mine a few times and all good

[Craved]

comparison web site

http://www.mkiv.com/techarticles/filters_test/1/index.html

interesting

[sl33ek]

I have a hks musroom too, it was filthy. It went all crumbly when I took it out. Just replace it, costs $50 from justjap, genuine HKS too.

[frankxinyu]

i have a pair of te Blitz ones on my car, they are not very good in terms of filtering.....

soon will upgrade to Apexi ones and hopefully wil be better.

[Taso84]

I have a hks musroom too, it was filthy. It went all crumbly when I took it out. Just replace it, costs $50 from justjap, genuine HKS too.

This is wat i am afraid of,

Should i get a real apexi one or just a $40 copy if i decide to replace it?

[Taso84]

comparison web site

http://www.mkiv.com/techarticles/filters_test/1/index.html

interesting

lol, care to translate for me?

[frankxinyu]

all i can read is that Apexi makes the best pods.......lol

glad i bought the good ones.

[Craved]

lol, care to translate for me?

sure as above

apexi lets the least through to the test filter ..

so you think of it this way

HKS mushroom = not as good as apexi

copy of apexi = less than HKS

[GTRgeoff]

Just use an Apexi panel and get the stock airbox back on unless you need to run huge power. My GTR runs the same size panel as the GTSt's with 260rwkw so decent power is not a problem, it just has more air inlets to the box and that can be corrected with a with of imagination and cutting and ducting. Plus you can then run a decent front mount without defect.

[Blitz]

Why would you clean an HKS filter element? They are a single use throw away item.

Purchase a new element for it as mentioned above, cost is around $50, and you then have a brand new filter.

Just Jap has them on their website

[MANWHORE]

One thing you will notice though is that the hks pod makes a lot more noise than the apexi. Therefore, theoretically, it should flow more.

However, this would be at mega power levels. At stockish power levels, any extra flow won't give more power.

On a 1000kw car, it probably would.

[GTRgeoff]

One thing you will notice though is that the hks pod makes a lot more noise than the apexi. Therefore, theoretically, it should flow more.

However, this would be at mega power levels. At stockish power levels, any extra flow won't give more power.

On a 1000kw car, it probably would.

Completely wrong.

Just because it makes more noise doesn't mean it flows more. It could be increased turbulence causing the noise, or greater restriction, ie blow a certain mass(at the same temperature) of air through 2 vastly different sized orifices in the same amount of time....the smaller orifice makes much more noise due to increased turbulence and restriction so more effort or pressure is required to do the same job resulting in a less efficient delivery. Equate this to the smaller filtering surface area and the turbo dragging the air through. Also in terms of sound pressures, if noise is coming out that is causing a negative pressure wave in the intake. Bottom line, HKS filters are complete junk. There was a HKS panel in my GTR and the amount of sediment lying in the bottom of my airbox after the filter was worrying.

Correct that stock power levels would be around the same but better flow means better response. The important thing though is clean air and HKS clearly fails that criteria from both my personal experience and others' testing.

What the testing shows is the boost produced by the car with each filter, of which the Apexi and then Blitz were the best (highest) with SARD and HKS the worst, and the filtering ability for the medium used for which the Apexi performed best and the HKS about the worst. I have another similar study on my other computer that I'll post if I remember.

[Jackman GTS4]

what do you guys think of K&N filters? i heard they were good but i dont have much clue apart from that... would an apexi one be best for the R33 GTS4 that i am about to buy?

[GTRgeoff]

I don't like them because they are oiled, so can introduce oil onto the AFM element and they don't clean very well. They also state they are for race only therefore call doubts about legality for road use.

Read the above I have posted. Will your non turbo GTS-4 be pulling more power than my GTR? Stick with the stock (but modified for extra air inlets) airbox and use an Apexi filter panel and protect your engine. Would you use really crap oil in the engine? Why introduce dust that will increase wear more than some oils?

Sure it doesn't look as cool, but if you wanted to be cool you'd have a GTR or RZ Supra or late model RX-7