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K&N or AFE?

View Poll Results: K&N or AFE?
K&N Aie Filter 238 31.61%
AFE Pro-Dry S Air Filter 441 58.57%
Other 74 9.83%
Voters: 753. You may not vote on this poll

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Old 07-19-2011, 04:08 AM   #61
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K&N CAI VS. aFe drop in filter

I've had a k&n cai on for ablot 15000 miles. Been seeing people say don't use k&n because of the oil and only sucks in hot air. I recorded the rpm's for idle and cruise speeds from 25mph to 70mph. Last night my aFe drop in filter came in. I put back on my stock intake with the afe. so far the rpms are a few hundred higher. I will update after this tank of gas with both rpms and mpg.
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Old 07-23-2011, 02:44 PM   #62
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Ok, So honestly, I know there has been lots of posts on CAI's. What does one really gain from installing? Have an 09 trd sport and was thinking of the K&N 77 intake. I've always had KN filters and cleaning them is NO big deal. Just wondering what I would gain in installing this?
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Old 08-01-2011, 11:24 AM   #63
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Quote:
Originally Posted by Geno96542 View Post
I've had a k&n cai on for ablot 15000 miles. Been seeing people say don't use k&n because of the oil and only sucks in hot air. I recorded the rpm's for idle and cruise speeds from 25mph to 70mph. Last night my aFe drop in filter came in. I put back on my stock intake with the afe. so far the rpms are a few hundred higher. I will update after this tank of gas with both rpms and mpg.
What does rpm have to do with your air cleaner? Your transmission and rear end control the rpm/mph.

There is no reason your rpm would be higher with one filter over another unless somehow your torque converter isn't locking up with one for some reason?
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Old 08-01-2011, 11:50 AM   #64
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Quote:
Originally Posted by dwr80 View Post
Ok, So honestly, I know there has been lots of posts on CAI's. What does one really gain from installing? Have an 09 trd sport and was thinking of the K&N 77 intake. I've always had KN filters and cleaning them is NO big deal. Just wondering what I would gain in installing this?
K&N doesn't make cold air intakes for Tacomas. They make hot air intakes but that's it.
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Old 08-05-2011, 02:07 PM   #65
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Quote:
Originally Posted by worthywads View Post
What does rpm have to do with your air cleaner? Your transmission and rear end control the rpm/mph.

There is no reason your rpm would be higher with one filter over another unless somehow your torque converter isn't locking up with one for some reason?
lol
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Old 09-07-2011, 09:54 AM   #66
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looking for better mpg's

does either filter help with mpg. should i go with the entire cold air system or just a filter for better mpg?
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Old 09-07-2011, 10:03 AM   #67
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Quote:
Originally Posted by jastampke View Post
does either filter help with mpg. should i go with the entire cold air system or just a filter for better mpg?
You won't get better mpg with a different air filter, or cold air system.
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Old 09-07-2011, 10:13 AM   #68
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Old 09-15-2011, 01:35 PM   #69
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I realize this thread is old as dirt, but K&N is not difficult to clean or oil IMHO. The whole process takes 5 minutes (plus time to dry before oiling). I've no complaints with K&N and I'm on my 4th vehicle with K&N now and still using the same recharging kit.
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Old 09-16-2011, 06:45 PM   #70
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I've always run KN in everything. The box says clean every 100,000 miles and that build up in the filter helps filtration. I know dusty/offroad conditions warrant cleaning more often, but over cleaning is bad for the filter. Did I read it wrong?
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Old 09-17-2011, 06:38 AM   #71
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Quote:
Originally Posted by COBOUNDTACO View Post
I've always run KN in everything. The box says clean every 100,000 miles and that build up in the filter helps filtration. I know dusty/offroad conditions warrant cleaning more often, but over cleaning is bad for the filter. Did I read it wrong?
I don't think you want to clean it too often. My approach is clean it religously - which is to say, only when I think of it. That works out to about twice a year.
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Old 09-18-2011, 01:15 PM   #72
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AFE definitely
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Old 09-20-2011, 04:41 AM   #73
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filter

even tho i am an amsoil dealer, i use afe. tired of the oil mess and problems which can result therefrom.
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Old 11-13-2011, 11:29 AM   #74
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would there be a difference in just putting the afe filter in oem box vs putting a afe filter on a CAI? im new to this so dont yell at me


p.s. can someone provide a link to buy such items please and thanks
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Old 11-14-2011, 04:43 AM   #75
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afe

i just bought the are and put it in the stock box. google are air filter and you'll get bunch of online stores selling them. i don't remember the name of the place i bought from. but it was 55 bucks shipped. by the way, according to my ultra gauge, my mileage did increase. when a motor doesn't have to work as hard to pull air in, up goes efficiency.
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Old 11-14-2011, 08:26 AM   #76
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Quote:
Originally Posted by hotrod45 View Post
i just bought the are and put it in the stock box. google are air filter and you'll get bunch of online stores selling them. i don't remember the name of the place i bought from. but it was 55 bucks shipped. by the way, according to my ultra gauge, my mileage did increase. when a motor doesn't have to work as hard to pull air in, up goes efficiency.
Your ultra gauge isn't precise enough to tell one way or the other, but strict laboratory testing using precise repeatable test loops say they don't increase mpg.

http://www.fueleconomy.gov/feg/pdfs/...02_26_2009.pdf

Pretty simply, the filter is not the restriction that is causing the motor to "work hard to pull air in" as you say. Under anything but wide open throttle, the throttle plate restricts the intake, that is how a gas motor is controlled. At any cruising speed the throttle is only slightly open, this causes the restriction and it doesn't matter if the air filter is more or less restrictive as the throttle plate is by far the biggest restriction. With no filter the throttle plate may open slightly less for the same speed, with a nearly clogged filter the throttle plate opens slightly more for the same speed but the mpg stays the same and the total restriction stays the same.

A restricted air filter may produce slightly less HP at wide open throttle and at 4-6000 rpm, but at part throttle it doesn't matter.

But throttle response, that another story.
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Old 11-22-2011, 03:24 PM   #77
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I just added an old used KN cone filter to the end of my oem intake arm. No significant gains over drop in amsoil filter. Just better throttle response on take off.
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Old 11-22-2011, 07:34 PM   #78
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K&N all the way

I guess it depends on your maintenance desires since the AFE is winning the poll. I've used K&Ns on my bikes and trucks for many years and never minded cleaning them. The manufacturer's data alone is enough to make me stick with K&N. The purpose IS to increase air flow after all.

AFE PRO DRY AIR FILTER = 416 CFM
K&N = 706.3 CFM
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Old 11-22-2011, 08:09 PM   #79
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Quote:
Originally Posted by Unzapato View Post
I guess it depends on your maintenance desires since the AFE is winning the poll. I've used K&Ns on my bikes and trucks for many years and never minded cleaning them. The manufacturer's data alone is enough to make me stick with K&N. The purpose IS to increase air flow after all.

AFE PRO DRY AIR FILTER = 416 CFM
K&N = 706.3 CFM
If the engine can't use it, it doesn't matter.

CFM = CID X RPM X VE / 3456 (3456 = 12" X 12" X 12" X 2 revs per CID)
CFM = 242CI X 5500RPM X 90% / 3456 = 346 < 416 < 706. Even 100% volumetric efficiency is less than 416 cfm

You aren't increasing air flow just because the filter can flow more.
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Old 11-23-2011, 06:59 AM   #80
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Quote:
Originally Posted by worthywads View Post
If the engine can't use it, it doesn't matter.

CFM = CID X RPM X VE / 3456 (3456 = 12" X 12" X 12" X 2 revs per CID)
CFM = 242CI X 5500RPM X 90% / 3456 = 346 < 416 < 706. Even 100% volumetric efficiency is less than 416 cfm

You aren't increasing air flow just because the filter can flow more.
Under perfect conditions where zero dirt exists that is true (even though that math is way beyond anything I want to figure out), but the fact is there will always be dirt in the filter. Given the same amount of crud build-up in both filters, the less restrictive filter will give better performance. Again, individual maintenance preference matters more, as they are both great filters. I'll stick with the K&N. They are cheaper anyway.
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