does those aftermarket intake with the cone filter hurt the motor? or should i keep my stock one on?
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Intake Question
- Thread starter contactace8
- Start date
I believe the consensus is that the K&N filter type cone filter will not hurt your engine but it will also NOT give you any HP gains. Most of all, the K&N type filter will draw air from the engine bay which might very well be warmer than the outside air which is a bad thing.
If you do a search on the subject, you will find that most people tend to agree that the stock OEM airbox is actually very good.
However, it seems that adding the Cantrell funnel-type airintake together with the UNI-filter seems to liven up your intake growl as well as possible make another 1-2 HP :smile:
+1, I like mine. A good cheap investment.
Listen to MvM. Keep your stock airbox.
not a big fan of the uni filters.
they let in a lot of dust.
on the other hand i run my mr2 turbo wth no intake filter.
they let in a lot of dust.
on the other hand i run my mr2 turbo wth no intake filter.
Its true, my uni lets in lots of dust.
Is KN filter type better or uni filter or OEM type?not a big fan of the uni filters.
they let in a lot of dust.
on the other hand i run my mr2 turbo wth no intake filter.
Are you making this determination by looking at dust collected inside of the engine side of the airbox?
keep the stock box.
Aleast your motor wont be suckin on hot air.
Aleast your motor wont be suckin on hot air.
not a big fan of the uni filters.
they let in a lot of dust.
on the other hand i run my mr2 turbo wth no intake filter.
What?
More info please. 
I had secret weapon r....
It showed gains when the car was not warm. After the car got warm, the hp numbers dropped. I put the OEM box back on and retro --- fitted the cone in the box and the but dyno felt some improvement and the Gtech said 6hp peak power increase....
When I got my car a few years ago, it had a cone filter, the NSX specialist said right away how that is only drawing in hot engine air of the engine bay. Not a good idea. I went with stock box and Downforce/Uni filter set up.
What?
i clean these things all the time for customers, basically the UNI is a HKS mushroom type foam filter.
the holes are big, good for flow, bad for catching dust. LOTS of dust gets through the holes and on to the engine.
K&N captures a lot better than the UNI since its a denser material.
If you put your uni filter up to the sun, you can actually see spots of light coming through.... maybe a streaching the truth a bit but not by much.
The only car I run that type of filter (GReddy yellow mushroom) on is my MR2. I was running no filter at all from my turbo but decided it was a bad idea since I found clutch metal flakes and dust and all kinda goodies in my intake system. :biggrin: :biggrin: :biggrin:
lol the filter definitely does kill jet engine sound :frown:
I dont run the uni on my nsxs. I have the apexi duel velocity stack intake cone...its hands down the best for air filtration and flows extremely well. the stock box and Honda filter is VERY VERY good.
little amount of dirt, probably not a big deal... but I know how meticulous nsx owners are :wink:
Happy motoring
Rob:smile:
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I think the HKS mushroom is a single stage very porous foam, but the uni is definitely a dual stage filter. Well atleast the later ones are. It has the very porous foam on one side, then the 2nd stage that you can see on the opposite side, is a MUCH tighter and dense foam. If I recall correctly, the uni filter for our car originally came in single stage. The newest one is dual stage and should be considerably better.
I'm running the dual stage uni.
Now that I think of it, I might be thinking of the K&N in my truck, that's letting stuff through instead of my uni in the nsx.
I'm running the dual stage uni.
Now that I think of it, I might be thinking of the K&N in my truck, that's letting stuff through instead of my uni in the nsx.
hks is the same dual stage design.
the bottom line is your using a sponge like material with big holes to filter out dust.
Wow, then the original uni must of REALLY sucked in comparison lol.
I have 2 different layers of foam in mine. A course and a less course.
I have 2 different layers of foam in mine. A course and a less course.
yep, this is the "duel" stage.
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OK, I had enough of this AIS sucking in more dust, dirt and what not more than stock.
Both ways get the air from the same place, through the side vent.
So.......if there is dust present, both are going to suck it into your engine.
Stock does not have any special VooDoo Magical Wand.
End of topic.
I am right, no need to reply!
lol
Trev
p.s. I am actually testing airflow and pressure drop on three filters in the stock box this aft. So far I have tested the dirty stock filter I have, the dirty k&n filter I have and the dirty uni filter I have.
They all flow close to the same with a very close pressure drop.
So at 150 cfm they all have a static pressure drop of about 1.8" water column.
I have just cleaned the two washables and will oil them in the next few days and see what that brings. I don't imagine too much difference but that is me guessing and I hate guessers.
Will post results.
Trev
Both ways get the air from the same place, through the side vent.
So.......if there is dust present, both are going to suck it into your engine.
Stock does not have any special VooDoo Magical Wand.
End of topic.
I am right, no need to reply!
lol
Trev
p.s. I am actually testing airflow and pressure drop on three filters in the stock box this aft. So far I have tested the dirty stock filter I have, the dirty k&n filter I have and the dirty uni filter I have.
They all flow close to the same with a very close pressure drop.
So at 150 cfm they all have a static pressure drop of about 1.8" water column.
I have just cleaned the two washables and will oil them in the next few days and see what that brings. I don't imagine too much difference but that is me guessing and I hate guessers.
Will post results.
Trev
I agree 100%, I run a nothing but a paper filter with OEM box. No dirt and oily residue is going to gunk up MY throttle body:biggrin: .
If you want some sound, then the intake scoop is good for just that...but you will realize no measurable hp gains. The Downforce scoop is less $$$ than the Cantrell scoop, but the fitment is a little different from what I read. I still have a stock snorkle, I have found plenty of other things to spend my money on.
I think you're supposed to clean after market filters every 6,000 miles? Being my NSX is a daily driver, I don't have time for that. The miles come on too quick and the 6,000 mile mark could be in the dead of winter when it's 0 degrees outside.
I went with an aftermarket intake, and used a stock OEM filter with it. Sounds good, with good protection.
I went with an aftermarket intake, and used a stock OEM filter with it. Sounds good, with good protection.
I replace mine every 5K, but that is only once a year for me.
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