S2000 Under The Hood S2000 Technical and Mechanical discussions.

Replacement for stock airbox filter, which one?

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Old 07-12-2007, 02:25 PM
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Originally Posted by iam7head,Jul 12 2007, 02:22 PM
watch out for foam filters, they are great for flow and best for turbo/sc application. but using it as CAI filter or with spoon snorkel it's a bad idea.
why is it a bad idea? what experiences do you have proving this?
Old 07-12-2007, 02:40 PM
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Originally Posted by SSM*03*S2K,Jul 12 2007, 02:25 PM
why is it a bad idea? what experiences do you have proving this?
well, i have one i have one when i was turbo'ed and i have one was i am using it as cai.


it's bad because most of the foam filter is very poor in filtering( but with increase of air flow), go search on google for filtering result. cotton/paper will ALMOST always better at filtering than foam filter.

second, my hks filter was not serviceable. you have to replace it everytime it 's dirty, most people don't realize that.

third, most of the CAI filter is very dirty(given the same time vs. sri, or stock) due to the location of the filter. Paring it up with a poorer filtering element doesn't make much sense to me.


that's why most of the foam filter originally was to be used on turbocharged application, back then people neither don't run a filter at all or they run a mesh over it. foam filter provide a better compromise for street application for turbo'ed car i guess, since the turbo needed the high volume of air to be compressed and the location of the filter usually inside the hood(vs. sticking out at the bumper like CAI)


again, i wouldn't use it on mine for everyday, maybe for track or autocrossing.
Old 07-12-2007, 08:02 PM
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Originally Posted by iam7head,Jul 12 2007, 02:22 PM
you took the wordz out of my mouth, the only good thing about k&N is it's reuseable, but do notice the gained flow is achieve by reduced filtering.

is there other k&N owner out there notice the mileage drop? i replaced my K&N with oem(new btw) when i was cleaning the filter, i leave the oem on the car for couple of day and it turns out 26+ mpg(not bad for many vtec shift, a/c on all the time)

watch out for foam filters, they are great for flow and best for turbo/sc application. but using it as CAI filter or with spoon snorkel it's a bad idea.
So are you saying that you lost gas mileage with the K&N? This would be interesting. I gutted my air box, installed an AUT plate with a ram air scoop and dropped in a K&N. My mileage increased by an average of 4mpg on my daily commute. I guess I will have to pop the Honda filter back in for a week to see if there are any changes
Old 07-16-2007, 06:00 AM
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anyone else care to chime in?
Old 07-16-2007, 06:06 AM
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K&N...The rest are overpriced
Old 07-16-2007, 05:51 PM
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Get this one...

BMC CDA SP-04
You will get this gain


It looks Far far better in real life than on the picture.
and it weights 2 kg total.
buy it at bmc site online in the USA.
Old 07-16-2007, 07:05 PM
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i'd say k&n if you didnt want to keep changing the filter and spend the 50 and get it out of the way for awhile but if changing the filter and spending that 25 bucks all the time to have the oem part get a honda filter. cant go wrong with oem
Old 07-16-2007, 07:17 PM
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Originally Posted by stena,Jul 16 2007, 05:51 PM
Get this one...

BMC CDA SP-04
You will get this gain


It looks Far far better in real life than on the picture.
and it weights 2 kg total.
buy it at bmc site online in the USA.
i am sorry but how did you manage to get 164.9 whp out of a s2k motor?

it's a typo or it's the worst piece of advertisement, ever

edit: is it in netwon/meter?
Old 07-17-2007, 12:53 AM
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HI.
Look at the CV on the left thats Horse power and 164.9 is power in KW.
The bmc made 170.2kw see the hp its 200whp on the bmc.
And yes the right is NM thats how torque is in metric european terms.

Yellow is Flywheel hp,Red is WHP,Green is Lost power from Flywheel to Wheels and Blue is Torque.
Old 07-17-2007, 04:17 AM
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I have a AFE drop in, it's like a hefner K&N. It's base is made from aluminum the rest is a tough silicone.
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