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Old 10-01-2008, 10:08 PM #31
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Hey guys I'm back. Now I have something to add now about the K&N stuff. I bought one last week and I kinda do and kinda don't feel a difference. I wanted a cold air intake, but couldn't afford one. The filter sold me on performance and the fact that I don't have to buy a new one every time I service my truck. It cost me $47 for the 1GRFE V-6. The truck feels alot more smoother than it did with the paper filter. I was going to see what performance it made, but I have to study for SAT/ACT stuff so I will do that later. If your worried about the oil messing up the mass air flow sensors than have a look on K&N's warranty. I hope this will help people.
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Old 11-03-2008, 05:43 PM #32
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I have been import racing for some years now and I notice that a lot of people make this mistake. One thing that you need to realize is that when you make additions to your motor, you need to make adjustments to your ecu (Engine Control Unit) (ie. Tune). Yes, you can strap on a cold air intake and make a lot of noise, but I am sure you are wondering where that 7 hp increase, as they advertised. The increase in horse power is going to take a couple of steps.

1) buy your bolt on
2) buy a stand-alone EMS-ECU (Engine Management System - Engine Control Unit) (ie. computer), piggy-back system, or buy a chip.

You have a couple choices here and I would recommend the first one. It will cost you a little bit more money, but the outcome will be better!

3) Take your car/truck to a DYNO and have them tune it and run it on the dyno to gain optimum performance!

or If you get a EMS-ECU or piggy-back system. You can tune your motor on the run (ie. while you are driving with a friend tuning your car)

Either way, you will get that horsepower that they companies are talking about in the advertisements. Now you know....don't just slap on a bolt-on and expect amazing results, because you won't, until you tune it!
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Old 11-04-2008, 09:23 AM #33
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Depends on what you are bolting on. Intakes on a 3.4 won't net much more than 7-8whp no matter how much time you spend on a dyno but with an SC and supporting mods a dyno tune would be a must.
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Old 12-07-2008, 06:53 PM #34
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Quote:
Originally posted by claytonb78
MY brother switched to a K&N air filter about a year ago and recently has been having engine problems as a result of the air filter actually. It was one to go into the OEM slot and the problems started after the first time he cleaned it. Mind you he is no professional but did follow the cleaning instructions and apparently the oil used to "recharge" the air filter got into his engine to cause some problems. I am sorry I do not have more details but needless to say his experience has turned me off buying a K&N HIK kit for my 4Runner.
My bet is he over-oiled it. They don't need alot of oil. I find that filling a small spray bottle (I use an empty eyeglass cleaner bottle) and using that to apply the new oil works very well indeed. You just need to dampen it, don't drown it, or indeed, excess oil will get sucked into the engine, and can wreck havoc with sensors.

I've recently acquired my 4Runner, but I had a Tacoma with the 3.4 V6 in it prior to this. The K&N filter I had in that never gave me a lick of trouble, and it did give a small but noticeable improvement in performance. I also used the "deckplate mod" for the airbox to improve airflow on that, and that too helped a little bit.

K&N filter for my 4Runner was one of the first things I bought for her. $43 bucks at the local Auto Zone.

People debate wether Toyota would have chosen a wet type filter over a dry paper filter in their designs if they were so good. They are considering other things besides performance and filtration quality. They have to think about unrelated things such as how long it takes for service techs to clean & re-install filters as opposed to making $ selling replacement elements. It's a heck of a lot faster (cheaper) to just toss the old paper element & drop in a new one.
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Old 01-20-2009, 11:47 AM #35
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I have the trueflow and while i dont think the car is "faster" i believe it has more punch right off the line, less lag...
performance definitely degrades over time as the filter clogs up...i noticed that after i cleaned and re-oiled it this summer, that punch came right back...probably time to clean and oil it again this spring..
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Old 09-17-2009, 12:15 AM #36
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Cold air intakes

When I look at the K&N ads they say that their CAIs are not legal in California. Are there some CAIs that ARE legal in CA? I'm a new 4Runner owner (06 Sport 2WD V6) and am trying to learn the ropes. Thanks
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Old 09-17-2009, 02:20 AM #37
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Quote:
Originally Posted by woodyc View Post
When I look at the K&N ads they say that their CAIs are not legal in California. Are there some CAIs that ARE legal in CA? I'm a new 4Runner owner (06 Sport 2WD V6) and am trying to learn the ropes. Thanks
AFE is CARB legal. TRD are 50 state legal.
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Old 10-18-2009, 09:20 PM #38
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This thread reminded me of this guys mod that I found several years back.

It's kind of the best of both worlds as far as a CAI onroad and full airbox offroad.
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Old 05-19-2010, 06:22 PM #39
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I just had my mechanic take off my K & N cold air intake and reinstall the original Toyota system. I did a lot of research on oiled filters over the last few days and decided to go back to OEM. I forgot how smooth and quiet it was! I'm going to monitor fuel economy now and see if there's a change.
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Old 07-11-2010, 08:35 AM #40
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The truth about air intake

It works. Plain and simple. All of you who are saying it doesn't haven't put one in. I installed a K&N cold air and felt immediate gain. I also ride motorcycles of all makes, models and years. You cannot compare the difference. As bikes are smaller and more sensitive and lighter weight- 10 HP is huge. I got probably 10-15 in my 06 T4R sport. It's louder, more responsive, and my miles went from city 16/highway 20--to after install--18-22 city/ 20-27 highway. You can say what you want about how they don't work but you are all crazy. The recharge kit for the filter is also designed with special oil to trap dirt on it's way in while allowing more air. No matter the filter you will get dirt in that is true (EVEN OEM). Use Lucas gas additive and engine additive (best on the planet for any vehicle--lucasoil.com). I am an insurance adjuster and I see every car you can think of. The more air you get and the colder the better, the faster you can get it out of your engine is also better. Why do you think turbo's and superchargers work???? They FORCE AIR IN THE INTAKE! Thank you for reading.
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Old 07-11-2010, 09:09 AM #41
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Nobody is saying that K&N doesn't improve power merely it's filtering ability. Yes the K&N FLOWS more than OEM but it filters less dirt. K&N is ok but there are better and newer filters out there. right now I've been running a AEM dryflow and I gotta say it does a better job than the K&N. After I add a few more mods to my truck I'm going to try out a Greddy/HKS foam filter and see how it does.
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Old 07-11-2010, 07:17 PM #42
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Is it a cold air system like what I have or a drop in filter? By the way I am going to run a tube into my fender behind the liner and put the filter in there to keep it even cooler, plus I took out the fake me out hood scoop and now I'm getting better air flow, I was thinking of even adding some spacers to my hood hinges to lift it up just a tad to let more ait get sucked out the back- things to keep in mind. Let me know how the filter goes. I'll let you know when I find headers and a new cat back to see how that works out. Anyone know if borla or flow mater is better- or trd?
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Old 08-30-2010, 09:14 PM #43
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There's a ton of misinformation in this thread.
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Old 09-09-2010, 02:24 PM #44
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Quote:
Originally Posted by truckmike26 View Post
There's a ton of misinformation in this thread.
And everywhere else....that is life.

If you know something that is based on factual information, then post it. Enlighten or educate the other members on the forum. Otherwise your post is just as misinforming as the rest.
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Old 09-09-2010, 02:50 PM #45
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My personal experience has been positive with K&N both drop in and Cold Air. I have run them on 8 of my vehicles and 3 of my motorcycles without any engine failures due to the filter.

I think the real key is keeping them clean. Especially depending on where you live and play.

You may get some particles into the motor that you wouldn't get using the OEM filter but at the same time that is the trade off to get more air into the engine without using a blower or turbo. This is no secret. If you don't want to clean a filter or try getting a little gain out of your motor whether it be HP or MPG then stick with OEM filters.

If you take care of your vehicle and keep up on all your maintenance, an oiled filter is a benefit. I just got my 4Runner but I will tell you that I will not hesitate to buy a K&N for it.

Talking air filters is like talking oil, everyone has an opinion on it and the internet and local garage is full of them. If I find a filter that I think is better than a K&N, I will give it a shot. However for now I will stick with what I know has worked for me in the past.
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