Um, I did read the post. All I said is that I don't think a PROPERLY oiled K&N will damage the MAF. It's when people oil it too much and/or don't give the oil time to settle in that they get oil on the MAF.

As for the test, it is a big eye opener. I got my K&N for free and I use the K&N cleaning kit to keep it cleaned and properly oiled. I may just go back to OEM filters (at least for offroading) after reading the findings.

The quote that really took me by surprise was this:

"Compared to the AC, the K&N “plugged up” nearly 3 times faster, passed 18 times more dirt and captured 37% less dirt."

 

so i should keep my stock box and filter. i probably did read this whole post right but is there any good after market filters for my stock box?

 

The HKS foam (closed cell 3 layers) or the STI one (in SPT catalog) also, no possible conflict with warranty if you even care. Both cannot be reused or cleaned... but since the Green is the same cotton soaked in oil as K&N ~ that one is going back.

 

what about the STi filter element from Subaru, what is that made out of??

 

Here... check this out. From the SOA tech mag (for mechanics & the service dept.).

Scroll down to the air filters and there is a picture of the three OEM filters!

http://endwrench.com/images/pdfs/FilterFeb06EW.pdf

 

yah i know, i have all the issues, but it doesnt say what its made of, is it oiled

well i guess it doesnt matter, the STi element is FROM subaru, soooo its gotta be legit haha word?

 

Im not saying the air hog filters better than a paper filter, but I had an instant increase of 3mpg when I changed, and the butt dyno showed no change.

 

....i have an air hog now.... tears

anyway, i need info on that STi filter element, NO ONE at livermore subaru knows anything...in CA....

BAHHHH!

 

Just get an SPT intake.

 

ha nah, im straight, i put in an STi filter like the next day after my last post on this thread

 

I think the funniest thing is when I did go to order a K&N air filter, the number that matches the 06 WRX was not even the right size. I have recently purchsed a typhoon system and will try to see what gains, losses it produces on a dyno and will repost then.

In my noob opinion...
the typhoon intake allows for more air to flow into the motor so I am not sure how that is a bad thing.

and my question is that the filter that was tested was specific for a Ford diesel, which is a different set up than the typhoon is.

if oil is bad for the MAF, why is the stock filter oiled and how is that one not bad. I guess I should reread again, but I just dont get it.

 

I was wondering about that too..

 

I have a Green Filter, similar idea to the K&N but more pleats and much better materials.

http://www.scoobymods.com/forums/showthread.php?t=2271

I've had Blackstone Oil analysis done a few times and my Silicon levels are normal showing that the filter is doing it's job properly.

http://www.scoobymods.com/forums/showthread.php?t=4718

Green Filter suggests cleaning it more often than the K&N. I do mine a few times a year. One thing about any oiled filter is the risk of over oiling. I like to oil mine and then let the filter sit overnight on some shop rags. This wicks out any excess oil. That works for me.

 

Thanks for the advice. I think I am going to be calling the shop that will be doing my tune for the exhaust and see what they reccomend.

 

The stock air box IS a CAI.

My reasoning for why a CAI > SRI is because the IAT(Inlet Air Temp Sensor) in the MAF is one of the factors for adjusting/advancing timing. Colder air more timing. (Although its a ****-poor location for it, it should be in the Throttle body after the IC or have 2 for calculating turbo/ic efficiency.)

Note: No aftermarket CAI or SRI is good for a stock WRX.

First off I did read the whole acticle. This one chart (attached), at least how I read it, conterdicts what you say about the K&N flow being the worst.

I read this as Restriction, In. of H20 across the filter(Actual pressure drop across the filter) as CFM increases. This chart alone shows that the K&N flows the best. I may have misinterpreted it but thats how I read it.

Jeremy