air intakw filter

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kolelt

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kolelt said:
Looking to buy new air intake filter. I know the after market k&n are oil based which is bad for our mass air flow sensor. But are the k&n air filters that are designed to fit into our original intake box also oil based ?
97 1997 Toyota 4Runner Air Filter - Air Intake - AC Delco, Beck Arnley, Denso, Fram, Full, Hastings, K&N, NPN, WIX - PartsGeek

On this website I see a k&n for around 20$ the very first one. Will that work well in my 4runner or should I go with denso ?
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Yeah, all the ones that are reusable are oil-based. I had a FRAM oiled one and my mass air flow sensor went to crap after a month.
 
The trick is to not over oil the filter. You only need enough for dirt to stick. On windy days or high speed driving the oil may pass through and ruin the sensor. Just speaking from experience. :lookout::lookout::lookout::lookout:
 
Personally I love K&N and have always run them. Oil it properly and it should be fine IMHO. I have one in my 4R. Love it.
 
Aftermarket performance filters like K&N and aFe are pretty much a waste of money. They don't filter as well as a stock paper filter, and the decreased resistance/increased airflow they provide doesn't matter. Here's one study, Air Filtration Test. Here's another one, Air Filter Comparison Study - GM Truck Central. There's probably 100 more, and they all show the same trend in results - OEM gives better protection, and the aftermarket filters don't provide enough additional air to matter.

Here's why - greater potential air flow does not equal greater air flow. Unless you have modified your motor for more fuel, higher compression, better spark, and freer exhaust, it doesn't matter if your K&N or whatever flows twice the air of a stock filter - your motor can't use it, and doesn't want it. The motor will only take on enough air to pack the cylinders on the intake stroke, so that's all that's going to come in through the filter, no matter what size intake or filter you have. Unless you're adding an aftermarket intake as part of a comprehensive series of mods, the only thing you're doing is harming your power output by allowing more dirt and oil through the intake.
 
I was thinking the same thing. I'd rather have a filter that catches a lot of dirt. Do you know where I can get a stock oem filter? I'm guessing denso makes it for toyota.
 
I don't know who makes the stock filter, but Denso seems a reasonable assumption. If you need OEM, I'd start at the dealer. I've been using NAPA Gold since I switched from the K&N drop-in, my oil seems to stay cleaner.
 
I was a fan of K&N's back when I had my old Baja Bug and that particular K&N actually there were two of them one for each carburetor worked fantastic.

However on the 4Runner the K&N is sub par because they do not make one that actually FITS, instead you get some skinny arse little filter and a funky plastic frame which fits the air box and the filter fits the frame. Then you have make sure that you do not over oil it or you degrade your MAF.

I dont think that is optimum design wise and I noticed a bit of dirt getting past mine.

Anyway I went with the Air Raid Jr kit with the dry filter and it works great.

If you also change your muffler to a free flowing one such as a Borla and really basically ANY of the after market mufflers are free flowing, that along with the Air Intake that comes with the Air Raid kit you do get a quicker throttle response without question, you "most likely" will see a very slight improvement in gas mileage on the highway and at least the "feeling" of a bit better pick up which may or may not be totally psychological but if you feel it what difference does it make?

AIRAID® - Jr. Kit - 2002 Toyota 4Runner Air Intake
 
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