Jump to content
SAU Community

Recommended Posts

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?

Link to comment
https://www.sau.com.au/forums/topic/129718-what-to-do-wit-air-filter/
Share on other sites

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?

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.

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

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.

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.

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 :(

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • It is a kunfine Android screen . Does anyone know the wirering diagram of the fuga ??
    • just an update to this, poor man pays twice  Tried sanding down the pulleys but it didnt do the trick. Chucked another second hand alternator in the na car which I got for free off my mate and its fixed the squelling. Must have been unlucky with the bearings.    As for my turbo car, I managed to pick up a cwc rb alternator conversion bracket + LS alternator for 250 off marketplace, looked to be in really good nick. Installed it , started the car and its not charging the battery.... ( Im not good with auto elec stuff so im not sure if this was all I needed to do but I verified such by using a multimeter on the battery when the engine was running and I was only getting 12.2v )   I had to modify the earth strap for the new LS alternator , factory earth strap was a 10mm bolt which did not fit the bolt on the LS alternator which was double the size so I cut it off , went to repco bought some ring terminals that fit, crimped it onto the old earth strap and bolted it up to the alternator , started the car and same issue. Ran like shit and was reading 12.2 at the battery.  For a "plug and play" advertised kit thats not very plug and play but alas.  My question is , am I missing something ? Ive been reading that some people recommend upgrading the stock 80 amp alternator fuse to a 140 amp but I dont see how that would stop the alternator charging especially at idle not under load.  Regardless ive pulled it out and am going to get it bench tested by an auto elec tomorrow but it would be handy to know if ive missed something silly or have done something wrong.   
    • My wild guess is that you have popped off an intake pipe....check all of the hoses between the turbo and the throttle for splits or loose clamps.
    • Awesome, thanks for sharing!
    • To provide more specific help, more information is needed. What Android screen? What is its wiring diagram? Does the car's wiring have power at any required BAT and ACC wires, and is the loom's earth good?
×
×
  • Create New...