Filter Differences

[Project D]

I am looking at buying a an intake for my SR20DET. What are the differences (if any) between the Greddy Airinx and the Dual Drive HKS filters? They seem to be the same and I can't find anything on their size difference if they in fact have any. Any help is appreciated. Thanks.

[90RS13]

I read a comparison on a bunch of filters a while back. It basically showed that all the name brands, HKS, GReddy, Blitz, etc, flowed pretty close to the same. But for every little bit more one flowed than another, the size of "particles" allowed to enter the engine grew accordingly. The one that flowed a bit above all the others was the Blitz ss one, but it lets the engine ingest some pretty large crap. Just be aware. I would just go with whatever you like, or can get on the cheap.

[ALTRNTV]

Apexi.

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[ZK]

Here is a good filter review:

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

Apexi won over the foam filters, metal mesh and the K&N.

[Project D]

Yeah I definitely want a filter that will in fact "filter". I heard that the foam filters do filter well. I haven't heard anything good about the stainless filters and if I remember right, the Apexi is a K&N (cotton) filter. 90RS13, If you have a link to that filter comparison, I would appreicate it if you could post it up. Thanks and keep the opinions coming!!

[HyperTek]

k&n doesnt make apexi's filters.. apexi filters are dry. Get cha facts straight!

Filtration doesnt effect taht much, your motor burns up anything.. as long as its not some big particles..

[Project D]

Sorry, I should have put style behind K&N in my previious post. I have heard many good things about the Apexi filters and its one of my options at this point that I am considering. I found one for $100 so its not much more than the other systems.

[papershot]

out of curiousity how do you clean apexi filters? vacuum or what?

[Yoshi]

out of curiousity how do you clean apexi filters? vacuum or what?

Iv'e had my Power Intake for 2 years, and it looks the same now as it did out of hte box, I love these things. the foam filters are ALL crap (I went thru the GReddy and HKS SMF before the Apex).

I suppose if you really wanted to to clean it you could take it off and hit it (gently) with a hot water pressure washer (no, the self-serve car wash won't do nearly as good a job), and let it dry out overnight (at least).

[Blues13]

The Apexi filters are meant to be replaced after awhile unlike the K&N. You can shake the filter out to get some debris out or use a air hose from the inside of the filter.. although you may risk damaging the filter element that way.

[Project D]

It sounds like its a toss-up between the K&N and Apexi for me. I like the Apexi one but I live where there is a lot of dust and I would like an investment that will last for a long time.

[90RS13]

The comparison was in TPR i think, or Dsport. One of the early issues. Just be carefull with an oiled filter (k&n). They can be fine but the oil can seep out of the element and contaminate MAFS. Also if you forget to re-oil, parts that were exposed to oil and then dried out later, can start to crumble. But if maintained properly, k&n is just fine.

[Project D]

I am pretty sure that I am now going to buy an intake from Apexi. Now, my next question is which intake from Apexi should I run? The power intake ption is the one discussed above, but there is also a Super Suction kit from Apexi that includes an aluminum pipe. I am planning on running about 11 PSI via a Greddy Profec B EBC. Also running an outlet pipe, downpipe, cat-back, pulleys, and an S-AFC/255 Lb/Hr fuel pump for extra fuel when boost in turned up. Some people have told me about intake issues when engine is receiving too much boost. I figured that this amount of boost wasn't enough to collapse the intake hose. If anyone can help me with this, it would be greatly appreciated. Thanks.

[Yoshi]

I am pretty sure that I am now going to buy an intake from Apexi. Now, my next question is which intake from Apexi should I run? The power intake ption is the one discussed above, but there is also a Super Suction kit from Apexi that includes an aluminum pipe. I am planning on running about 11 PSI via a Greddy Profec B EBC. Also running an outlet pipe, downpipe, cat-back, pulleys, and an S-AFC/255 Lb/Hr fuel pump for extra fuel when boost in turned up. Some people have told me about intake issues when engine is receiving too much boost. I figured that this amount of boost wasn't enough to collapse the intake hose. If anyone can help me with this, it would be greatly appreciated. Thanks.

The Power Intake comes with an aluminum fitting, albeit a short one, you still retain the flexy part of the OEM intake, no biggie. There is no way you're going implode on teh stock turbo, maybe a T78 @25-30lbs or something....

I live in eastern washington, if you didn't know what that means... it means I'm surrounded by huge dusty wheat fields ALL AROUND my town. Pullman is known to be one of the dustiest places in washington state, I think it's worse here than when I lived in phoenix. Point being, the Power Intake is fine for your build plans.

I swear someone mentioned this b4, but hte K&N filters, while cleanable, are oiled filters. This means a lot of their filtration comes from the oil catching the particles that fly-by. Suction in turn pulls the oil thru the filter on a fairly regular basis (in minute amounts). But it's been reported by serveral people taht over time, the buildup of sludge will coat your MAFS and give you improper readings, typically making it unable to detect how much air is actually coming thru, and creating a rich condition.

You're over analyzing a very simple part of the car. Get the Power Intake and be done with it, you'll be fine... and if all you ahve now is the stock airbox, you'll notice a very slight increase in throttle response, and a wicked new sound from under the hood ;)

[Sky240PWR]

I think the Blitz sus filter is one of the best!, i've seen gains for the supra, skyline and rx-7 as much as 25 whp, i doubt alot of those other filters can say the same!!

[Yoshi]

I think the Blitz sus filter is one of the best!, i've seen gains for the supra, skyline and rx-7 as much as 25 whp, i doubt alot of those other filters can say the same!!

Ok, dyno sheets please.

This wasn't on NFSU or Forza or something right?
Is that with or without the Type-R stickers?

I can't speak for RX7s, but there is no way any SR, RB, CA, or KA is making 24hp from a measly intake, much less 24 to the wheels. S chassis owners are lucky to get 24RWHP from I, H, AND E.
I'm calling shinanigans on that RIGHT NOW. :rolleyes:

[wylin]

The comparison was in TPR i think, or Dsport. One of the early issues. Just be carefull with an oiled filter (k&n). They can be fine but the oil can seep out of the element and contaminate MAFS. Also if you forget to re-oil, parts that were exposed to oil and then dried out later, can start to crumble. But if maintained properly, k&n is just fine.

HKS filter hairs can also break up over time and stick to your MAS/ MAF once my car started stumbling and i took out the maf and examined the hotwire and discovered a green hair on the hot wire element from my hks foam filter!

[Project D]

Awesome, I just wanted to make sure about the intake hose not failing b/c of higher than stock boost. Yeah, Western Colorado is etremexly dusty and I will need something that filters out the dust well while making a gain inperformance. After reading that review in one of the previous posts here, the Blitz SUS filter let by a lot of dirt, but not as much as the HKS! I guess in Japan when you are only running an avg. of 30K on a Nissan motor, the filter letting by so much dirt probably isn't too much of a problem. However, the Western United States is not Japan!LOL. Oh, my buddy had the Blitz on his FD and he saw about 12-13 WHP, definitely not bad but definitely not 24 WHP either!

[Sky240PWR]

Ok, dyno sheets please.

This wasn't on NFSU or Forza or something right?
Is that with or without the Type-R stickers?

I can't speak for RX7s, but there is no way any SR, RB, CA, or KA is making 24hp from a measly intake, much less 24 to the wheels. S chassis owners are lucky to get 24RWHP from I, H, AND E.
I'm calling shinanigans on that RIGHT NOW. :rolleyes:


well i have the artical from Importtunner!!! They do a run on the dyno before and after they install a product, and the supra and rx-7 both had numbers in the 20's for whp. so why wouldn't the inline 6 turbo nissan motors(rb25 and rb26) benifit the same as the supra and rx-7??..I think they would! thats why I'm getting the blitz sus filter!! :hammer: :hsdance:


and as far as your friend withe the FD, maybe it wasn't tunned properly cause i have the mags with the articals with their dyno sheets so why would they be lying??

[twong85]

and as far as your friend withe the FD, maybe it wasn't tunned properly cause i have the mags with the articals with their dyno sheets so why would they be lying??

It sounds like sarcasm. (at least I hope that was sarcasm)

[MakotoS13]

its A FREAKING AIR FILTER.

freakin crap. i've spent more time trying to pick out a new toothbrush.

[Project D]

I'm pretty sure my friend's FD was properly tuned since he took it to a rotary specialist in Denver to have the upgrades installed and tuned, but maybe they aren't. At any rate, the apexi seems to be the best when it comes to filtration and performance. And the kicker is the price, only $130 vs. $145 for HKS and $150-200 for blitz.

[Sky240PWR]

I'm pretty sure my friend's FD was properly tuned since he took it to a rotary specialist in Denver to have the upgrades installed and tuned, but maybe they aren't. At any rate, the apexi seems to be the best when it comes to filtration and performance. And the kicker is the price, only $130 vs. $145 for HKS and $150-200 for blitz.

Well i can't say anything about the filtration cause that wasn't in the artical but you guys have to relize i didn't make all this up. theres got to be someone in here that reads or has read Importtuner??? and that can back me up that they have a section in the mag called Power Pages?...anyone?

If it was me I would pay the extra $50 for the blitz cause they've proved to get high hp gains!!.........I remember seeing the apexi filter on the Power Pages, I can't remember the hp gains but i do remember not being impressed!!

[Sky240PWR]

Oh yeah, I did find the artical so now i can say TOLD YOU SO!!!!!

http://www.importtuner.com/tech/0111it_ppsupra/index.html



click on the site and go down to dyno testing!!

[s14turbosilvia]

Well i can't say anything about the filtration cause that wasn't in the artical but you guys have to relize i didn't make all this up. theres got to be someone in here that reads or has read Importtuner??? and that can back me up that they have a section in the mag called Power Pages?...anyone?

If it was me I would pay the extra $50 for the blitz cause they've proved to get high hp gains!!.........I remember seeing the apexi filter on the Power Pages, I can't remember the hp gains but i do remember not being impressed!!

Yes, i know what you're talking about. And why is yoshi so quick to jump on whp gains from an intake? shit man, we're talking about turbocharged cars here, not your N/A SOHC honda. I've seen 35 flywheel hp gains from intakes on turbocharged cars, so 20-25 whp sounds just about right. Hell, I got 14.2 DYNO PROVEN gained horsepower on my N/A SR20DE with a CAI. Relax dude.

[MakotoS13]

i've seen a stock FD make 300ftlbs torque at the rear wheels with just a stock motor and intake.

i ain't kiddin.

[ZK]

Doing breathing bolt ons on turbo cars will yield some big horsepower. I personally would pick an intake on filtration as all these filters will not filter as good as the stock paper one so I'd pick something that has the best compromise between filtration and power gains. Longevity of motor > power gains in my book.

Yeah, the Blitz may produce big numbers but that filter doesn't really filter out much. You're pretty much sucking everything into the motor. HKS foam dries out, breaks down and gets sucked into the engine. K&N oils contaminate your MAF... so not much left to choose from.

[TheSnail]

The Apexi if you have money, or the radio active symbol (SuperStreet) filter you find at advanced, Wal-Mart, Pepboys.. if you dont.

[Project D]

Apexi will be going on my car, thanks for the input!!

[Yoshi]

Oh yeah, I did find the artical so now i can say TOLD YOU SO!!!!!

http://www.importtuner.com/tech/0111it_ppsupra/index.html



click on the site and go down to dyno testing!!

wow, props for coming up with the dyno stuffs, even if it IS import tuner ;)
(tho maybe they've gotten better, they were certainly considered fodder a couple years ago.. like SS level)

So yay, they made bigger power on a supra, in a mag that's been more than a couple times accused of false reporting and inplications of being "buyable" ... not that I'm saying that this is one of those instances of misrepresentation, but the mag, at least a couple years back, had a very bad rep. (hell if I was going to re-sub!)

Apples and oranges STILL tho. It's a supra, and in no way related to any S-chassis. The plumbing of a JZ vs. SR/RB etc is different, and thus is not a straight across the board comparison. The gains seen on the supra are not really indicative of any other applications besides.... you got it, another Supra.

I still say that 24whp is unrealistic on an SR, if you can prove me wrong GREAT!!! cuz if I'm wrong, that means my car is putting out more power than I thought, and that's ALWAYS good news :) All I know is that I've been thru 3 different intakes, 4 if u include the stock airbox, and there was VERY MINIMAL feel via the ole butt-dyno for any of them. If the difference was anywhere close to 24whp, I'd definitely feel it. Besides, like ZK said, get an intake for the filtration to prevent bad things happening to your engine... if performance is all that matters (ie. track only drag car), run w/o a filter, that's the most air u can shove into that turbo :D

[Sky240PWR]

well I know the supra and skyline are differnt but they are both a turbo inline six so its not going to be a exact comarison but they would be pretty simular.
and your right i don't think it would be as much with the sr20, I have the RB25DET so i was talking about my car.