Aftermarket Engine Air Filter

[F8L]

Originally Posted by Rakimb17

And don't squeeze, BOOST!

Or Boost and spray..... Meth!

[problemchild]

The same people who I posted about above tested EVERY air filter made on a 200,000 dollar flow bench. The tests were done by the pros. The final verdict was the GM OEM filter was the best for the trucks and the KN/UNI foam and cleanable filters were the WORST by a long shot. About the only thing the KN filter would stop was squirrels and small stones. It was allowing so much dirt to get into the engine it was unbelievable. I would not put that garbage on any motor I owned.

Originally Posted by tochatihu

There are a few Prius with K&N air filters. The engine performance and fuel economy are not improved, but there is a potential savings in terms of paper filter replacement

In the 2001-2003 model the air filter is directly over the MAF, so it is important to re-oil *lightly* after cleaning to avoid oil drips onto the MAF. In the new model Prius the engine air filter is relocated, so this may be less of a concern.

On all Prius (or, all cars) there is the potential for the K&N to pass more particles. It seems wise to perform used engine oil analyses and keep ttrack of silicon. If that goes high, we can be pretty sure that the K&N is not right for you.

[MR.K]

Yea but over 400 $ for a stock air box when yours is damaged ...50 $ sounds pretty good....

[amm0bob]

Originally Posted by prius4ed

My 2004 Prius air box (air filter housing) was damaged in an accident. Instead of replacing it with an OEM box and MAF (mass air flow) sensor, I would save a lot of $$$ using an aftermarket cold air intake filter & pipe. Will need to somehow attach it to the OEM MAF sensor. Anyone have any clues for this, and a lead on the intake kit? I see them on Ebay for $40-50.

You're in Cali right Bra...

First off... if the air filter/intake is not CARB approved, you wont pass smog.

Second... The stock air-box is very efficient.

Third... stay away from oiled-foam filters with modern electronic controlled sensors (MAF/MAP etc.) that get contaminated with the oil from the incoming air over that filter. These type of filters work quite well with a carb motor and someone that isn't too keen on changing dirty filters very often, but are a detriment to finely tuned and monitored fuel injected ones.

[northwichita]

Thanks for all the info, I learned a few things from them. I'll probably stick with oem filter, my question concerned reusing a stock filter after blowing it out with an air gun. I drive all day on dusty roads, and have been in the habit of cleaning the air filter in other cars every oil change, to minimize the cost of new ones. I shook the prius one out last week, got some dust out, it looked more like cloth/synthetic then paper.. Washable? A rural carrier.

I looked this up in my Bentley manual, says clean element with compressed air, if not extremely dirty , nothing about washing it.

[GatorJZ]

Originally Posted by problemchild

The same people who I posted about above tested EVERY air filter made on a 200,000 dollar flow bench. The tests were done by the pros. The final verdict was the GM OEM filter was the best for the trucks and the KN/UNI foam and cleanable filters were the WORST by a long shot. About the only thing the KN filter would stop was squirrels and small stones. It was allowing so much dirt to get into the engine it was unbelievable. I would not put that garbage on any motor I owned.

Hate to burst your bubble, but the "pro" who conducted the "test" you are referring to, Username Spicer on bobistheoilguy, is a tree trimmer by profession, not exactly an engineer. He tested one application only and you can not extend his results across the board to all aplications of all filters. While I have some slight misgivings about K&Ns, they are FAR better filters than you are giving them credit for.

[Rakimb17]

Originally Posted by F8L

Or Boost and spray..... Meth!

A little Meth never hurt anybody...lol

[F8L]

Originally Posted by Rakimb17

A little Meth never hurt anybody...lol

Agreed! Chris Chow of GN fame got me hooked on the stuff. I still have all my teeth though.

[60psi]

Originally Posted by ASavingMember

what did you crash into?

a 2 1/2 lb huffy bike!