K&N Air filter

[karloslatynos]

I am going to replace standard air filter to K&N one but debating whether to go for full kit (with chrome pipe work) or just simple air filter?

http://www.ebay.co.uk/itm/UNIVERSAL-PERFORMANCE-COLD-AIR-FILTER-INDUCTION-INTAKE-KIT-K-N-STYLE-2103007R-/161399698201?hash=item25942bf319:g:CJQAAOSwVFlT9Hc q

Has anyone tried this? Does it make any difference in terms of sound, fuel consumption and performance?

Why there is a range of prices between £10 to £45 just for filter?

[willieG]

I have just a kn panel filter in the stock air box of my 1.3Lmanual

there was a little bit of a difference in acceleration from 2nd gear 60km/hr between 2marks on the road. between 4-7km/hr better speed with the k&n compared to stock.

wasn't anydifference in sound IMO.

Then I made the cut a couple holes in the bottom of the stock airbox. Makes it much louder almost like a pod filter sound and I haven't bothered with going back to that same road to test again.

not too sure about fuel efficency difference. Might be better because if i put my foot down too far it makes to much noise. ha ha

its not super science. but ehh. I did change filters back and forth after a couple runs to check the difference in speeds incase it was the direction of the wind

[bronsin]

You should know that the oil on the KN filter tends to end up on the MAF sensor which then throws a code or gets damaged and a new one is like $300.

Bronsin does not recommend KN filters for the Yaris. :thumbdown:

[Exiwolfman]

I am going to replace standard air filter to K&N one but debating whether to go for full kit (with chrome pipe work) or just simple air filter?

http://www.ebay.co.uk/itm/UNIVERSAL-PERFORMANCE-COLD-AIR-FILTER-INDUCTION-INTAKE-KIT-K-N-STYLE-2103007R-/161399698201?hash=item25942bf319:g:CJQAAOSwVFlT9Hc q

Has anyone tried this? Does it make any difference in terms of sound, fuel consumption and performance?

Why there is a range of prices between £10 to £45 just for filter?

http://www.carid.com/afe-power/?gclid=Cj0KEQjwwIKxBRDKhOz7ytT30vkBEiQAT1NaPULf0zW EF6rA0gsvVFij5z80dQ5iL4yMpiqWHmuJOqUaAnLn8P8HAQ

[tmontague]

I'd recommend just going with the full intake and not just the filter.

I had removed my snorkel, plugged the snorkel hole and then opened up the other 2 sides of the whole airbox. It sounded better then stock. I then installed a short ram intake and it was louder under the hood. I can't compare acceleration since I never did any hard pulls when I had the stock air box in.

If you do any other mods like an exhaust header, you'll wish you had a full intake and not just the filter. I'd also recommend non oil type filters.

[invader166]

Bronsin does not recommend KN filters for the Yaris. :thumbdown:

Invader approves this! :thumbsup:

No to oiled air filters on the Yaris!:biggrin:

[UberSilver]

My Yaris came with a K&N CAI system. I put the stock box back in and notice Zero difference . I would not waste your money, or the engine longevity on a snake oil company like K&N.

Put your money into things that make a difference, like Shock/struts, springs, sway bars, and tires.

[tmontague]

^ I do agree with this as in I don't think it's worth the $350 you can find the brand name ones online for. But you can easily buy an ebay kit and if it doesn't work perfectly just buy a cone filter and use a sawzall to make it work.

I was fortunate to buy a used TRD cold air intake for a great price, but I wanted a short ram due to water concerns. I cut and hacked and zip tied and now it works problem free and no vacuum leaks.

The more mods you have in regards to air flow the more important the intake is. On its own it's pretty much pointless. Paired with my header, 1 ZZ throttle body and ported intake, it is awesome. The growl from the engine bay is awesome and it actually pulls enough now to put you back in your seat

[ern-diz]

For Sale:

Slightly used K&N Air Filter.

:frown:

[Bluevitz-rs]

You should know that the oil on the KN filter tends to end up on the MAF sensor which then throws a code or gets damaged and a new one is like $300.

Bronsin does not recommend KN filters for the Yaris. :thumbdown:

I second that. In fact any oiled filter is not recommended. You want a washable dry element filter.

[sickpuppy1]

I guess it takes along time to mess with the sensor, or is it when they are oiled too heavy?
I put a K&N air filter on at about 25k miles and am now at 94K with no issues. Not disputing what you found, just curious about it. After I clean mine, I do a very light coating of oil, as I don't want to restrict air flow,just catch dirt. That being said, I haven't seen any performance or gas mileage difference either. So is it worth it the money they ask for it? Not really, course I got mine as a low bidder so I only paid 21.00 to begin with for the whole kit. Not a CAI, just the filter kit for the stock box.

[Bluevitz-rs]

The MAF sensor works with a hot wire inside at about 200°F. So any oil vapour carbonizes to it and slowly insulates it causing it to react slower and slower and can make the car run leaner and leaner.

[willieG]

hrmmmm .. my car does run lean at full throttle. i think.

its like 18.7 afr. even if i go full throttle at 2k rpm all the way to near redline, altho half throttle stays at 14.7 through out the rev range.

Does the yaris have a 'learning ecu' (if thats a thing??!?) because i drive rather light footed normally

might have to try stock filter again and clean the MAF senser to see if it changes the afr

[Bluevitz-rs]

Yes the ECU learns long term and short term fuel trims.

[Rigaud]

Two years with a K&N air filter and I use fogging oil for open air filters on the Yaris. I have two filters, I wash one and lightly fog it then put it aside, other one is on the car in use. When it's time to do a filter clean/wash I swap. Not ever had a contaminated MAF and I clean my MAF, Throttle bodies once a year but their spotless. A/F ratio has been the same.

My winter beater a 98' Subaru Legacy GT also runs a K&N with P-flow.........zero issues.

Now do I have any performance gains? Yes but only because nothing is stock from TB, intake to complete exhaust and more. Do just an open air filter and your wasting your time unless you just want to make noise.

[paulge3]

I also have the k&n that I got from 4 wheel online (http://4wheelonline.com/). Have no problems with it. I just need to be careful when cleaning and re-oiling it so that it will not mess up the MAF. Can't tell if there's a noticeable change in power and fuel consumption but I like how it sounds.

[craig11520]

I have a K&N in my stock box. Never had an maf issue. Light oiling is the key to keeping it clean in my opinion. Does it add more oompf to the engine? probably not but one thing a reusable filter will do for you is cut down the $10-$15 dollar out of pocket expense of having to replace the basic paper filters every time they get dirty.

[JimKellyfan]

The filtration is less, thus allowing more air and crud into your engine. Of course there will be more airflow but at what cost ? I use Toyota oil and air and cabin air filters only in both my Yotas.

[bronsin]

I have a K&N in my stock box. Never had an maf issue. Light oiling is the key to keeping it clean in my opinion. Does it add more oompf to the engine? probably not but one thing a reusable filter will do for you is cut down the $10-$15 dollar out of pocket expense of having to replace the basic paper filters every time they get dirty.

I think youre right you have to be sparing with the oil. Probably there wont be a problem if you do that.

[Rigaud]

The filtration is less, thus allowing more air and crud into your engine. Of course there will be more airflow but at what cost ? I use Toyota oil and air and cabin air filters only in both my Yotas.
Not really. Using a bigger air filter with more surface area allows more air. But only if the engine set up requires it otherwise it takes what's needed.

[MUSKOKA800]

188,000 kl on my Yaris using K&N drop in with zero issues.
I kept the original filter and put it in while I clean and oil the K&N. Let it rest overnight on paper towels (to drain any excess) and re-install the next day.
I have run oiled K&N filters in all my vehichles since my 1988 Mustang GT. Never a MAF issue, although I do clean the MAF periodically with spray.
When I ran a K&N kit on the Mustang I found it annoying because without a spare filter I couldn't drive during the cleaning process. Later I saw a dyno test comparing the OEM Mustang filter compared to the K&N drop-in and the K&N kit (with cone filter). The drop-in and the kit gave an identical HP increase. Both about 5 hp more than the OEM paper filter. Since then I've opted for the convenience of the drop-in. All I'm missing is that increased intake sound of an open filter. And for that I could swiss-cheese the air box. But I won't.

[ern-diz]

Fantastic. Now I'm thoroughly unsure on whether or not to run the drop in I bought lol.

[craig11520]

ern. you bought the filter. at least try it out. you can always remove it and go back to the paper filter if your unhappy. obviously we all have our own opinions and personal preferences on the issue. neither side is right or wrong. companies like k&n wouldn't be in business if they weren't good to use. personally i'm interested in hearing your opinion once you've tried it. just follow what we've said, lightly oil, let it drain and dry up a bit, pop it in and give it a go. I've got the drop in myself on the yaris and I have a full blown kit on my 01 ford ranger. the yaris is the wife's main ride and even she can tell the difference with the filter in when she punches it to pass someone up.

[ern-diz]

ern. you bought the filter. at least try it out. you can always remove it and go back to the paper filter if your unhappy. obviously we all have our own opinions and personal preferences on the issue. neither side is right or wrong. companies like k&n wouldn't be in business if they weren't good to use. personally i'm interested in hearing your opinion once you've tried it. just follow what we've said, lightly oil, let it drain and dry up a bit, pop it in and give it a go. I've got the drop in myself on the yaris and I have a full blown kit on my 01 ford ranger. the yaris is the wife's main ride and even she can tell the difference with the filter in when she punches it to pass someone up.

thanks, craig...i bought it a few months back and have been running it up until reading this thread...i thought it felt a bit better with it in, but it could easily be placebo...last thing i'd want is a gunked up maf since i don't do any maintenance on the car myself, so that's my only concern...i should mention that i threw it in straight out of the box...was i supposed to lightly oil, etc. prior to installing, or do they come good to go out of the box?

[WeeYari]

^ if the filter element was a purply red colour, then it was pre-oiled. Whitish in colour, then it was un-oiled.


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[Jason@SportsCar]

You should know that the oil on the KN filter tends to end up on the MAF sensor which then throws a code or gets damaged and a new one is like $300.

Bronsin does not recommend KN filters for the Yaris. :thumbdown:

Pretty sure this has never been scientifically proven.

I have been using oiled filters for over 20 years without a MAF problem.

[xnamerxx]

most off road vehicles like RZR and such use oiled filters.

The only way oil ends up on the MAF is if you put to much of it on the media element. I've run oiled filters in every vehicle I've ever owned, and never had a MAF code pop up.

[ern-diz]

^ if the filter element was a purply red colour, then it was pre-oiled. Whitish in colour, then it was un-oiled.


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Thank you, mine was a purply red color.

How long should I run it before thinking about cleaning and lightly oiling again? I'm sure it probably says on the box. I should go read lol.

[ern-diz]

...called Toyota and spoke to a guy in the parts dept (for what that's worth)...he said he's been running one in his truck for 6 yrs without a problem, but also cleans the maf occasionally...sounds like one of those situations where whatever gains are had come at the cost of some additional maintenance?...being that my car is slow with or without the k&n, i'm probably going to just stick with the stock filters so i don't have to think about it...

[WeeYari]

I run an oiled cone filter on my SRI. When I remove it in the fall and switch over to stock airbox for the winter, I clean my MAF. Every time I clean it, I notice that it is not really dirty. Light oiling is the key. Over oiling, which is a rookie mistake, is the killer.

[craig11520]

In reference to how ofen to clean it. Ive read k&n material that says a filter that is slightly dirty performs best and once a year to clean and oil it. Personally i do mine two or three times a year depending on dirt discoloration in both the yaris and my truck. For some real horsepower gain i suggest checking out the Econo Maxx at economaxx.com. proven fuel savings and significant horsepower gains but pricey. Set you back about $125.00. Might turn that slow ride into a zipper ern.

[ern-diz]

I run an oiled cone filter on my SRI. When I remove it in the fall and switch over to stock airbox for the winter, I clean my MAF. Every time I clean it, I notice that it is not really dirty. Light oiling is the key. Over oiling, which is a rookie mistake, is the killer.

In reference to how ofen to clean it. Ive read k&n material that says a filter that is slightly dirty performs best and once a year to clean and oil it. Personally i do mine two or three times a year depending on dirt discoloration in both the yaris and my truck. For some real horsepower gain i suggest checking out the Econo Maxx at economaxx.com. proven fuel savings and significant horsepower gains but pricey. Set you back about $125.00. Might turn that slow ride into a zipper ern.

Thanks for the info, guys. Much appreciated.

Upon hitting the Econo Maxx website I realized I've seen them before. The concept makes sense to me. I'm waiting to hear from Garm on getting some of those Micro Image intakes in stock. Think I'm going to spring for one. I feel like any MAF maintenance will be worth it for that gain. The Econo Maxx could be a nice bump to that, though I've heard that if you don't do the entire intake/exhaust system, the gains aren't as much as advertised.

[rabbito]

i use to have Simota Intake kit..sounds like a boat and lose low end..i changed back to k&n drop in filter..solid low end power..i wouldnt go on intake kit unless i changed the throttle body or manifold

[Fluxtasy]

Living in a hot weather country and driving a matic, my preference would be a drop in panel filter as the stock box acts like a cold air intake anyway.

[ern-diz]

Interesting...

[rabbito]

i been using K&N on all my vehicle...wash em and oil them very lightly..maf sensor messing up, you must putting shit load of oil...hp increase? nope but it comes handy after i got my header and center pipe installed..feels more smoother

[SirDigby]

another thing to keep in mind is there is this stupid carbon filter on the top half of the airbox cover. it is plastic riveted in. if you remove this extra filter it's good for a few more CFM....if you plan to keep your stock box

[texascolt45]

I have one of those drop in k&n's.hasnt helped the mileage or power 1 bit.going on 8000 miles.

[ern-diz]

For what it's worth, I took the K&N drop-in out after first reading about MAF gunk up in this thread. After reading a bit more and learning it comes down to the amount of oil on it after cleaning, I put it back in. Noticed a smoother idle. Can't speak for power and MPG seems the same, but definitely noticed a smoother idle.

[rabbito]

K&N does not help much..i feel like it just saves money by washong, drying and putting them back on..

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