Good response. Thanks.

 

Dam good point Brettus. In this case we can not take one point or fact and run with it. Fact is all filters let dirt in when they are sucking in air, thats why we change them and change our oil to keep the deposits from building up. Be it dirt or metals. On thing I have noticed is; even with all the dirt in Vegass the stock filter and box only needed to be cleaned about every 6 months. My K&Nv2 intake needs to be charged about every 3 months. How ever my oil is still dirty as fruck when I change it lol

 

Brettus, as always, makes a very valid point. We do tend to be overly concerned with some of these maintenance items, given the relative longevity of the engine/vehicle in the first place. But such is the Way of the Enthusiast.

 

Well maybe when I hit the dyno I will see if there is a difference. Easy enough to swap out the K&N with a Wix. Thanks for the input guys.

 

so you're making 225 rwhp on the OE air box with a paper filter?

 

Yeah, like which engine oil to use..

 

Who is making 225rwhp?

 

There is a good link on the forum to a Construction owner who tested KN filter verses stcok filters on Catapillar dump trucks bull dozers ect..

His results were K&N you die, stock filter for the win!

More power but more dirt in the engine lead to failures.

there is always a compromise.

 

I will search for that link. I did a search for air filters, testing, etc. I couldn't find anything.

 

Okay, check out this article out. Found it in another thread.

http://www.nicoclub.com/articles.php?id=180100

 

Talk to speedsource. See what they recommend. Nuff said.
OD

 

I know they use the OEM Mazda filters on their GT cars. I saw it on the car and there were some on a shelf when they were at Daytona.

 

Yep, Eric posted that with the K&N some teams were seeing sand in the oil pan at some tracks. Just trying to spread the word, our engines need as much help as they can get.

 

Yes, and what harm could a little dust pose to an apex seal groove anyway...
But, if not that, what about MAF and SSF issues?

 

I'm in the desert. Been running the k&n v2 intake for years till I found sand in my pants
But really, I daily drive my 8 and have never had any sand in my intake.

 

I think team is saying you cant do it with a stock filter on a side note I said do it

 

In my research and experience the K&N does pass more air, but also better filters thanks to its material, construction and thin layer of oil that naturally attracts more airborne contaminants. Of course you need to clean it periodically. There's not enough oil to pass on to the MAF if recharged properly - as Jedi said "less is more."

 

no but i am making over 300hp to the wheels with a pull through fi system and i use a paper filter. I dont have the oem airbox but i do have an aem paper filter.
If you think a paper filter is restrictive--just increase the size over oem a little.
I will never run a K&N again with a rotary engine.

 

My WIX is performing well.

 

I want to by a induction filter for my Rex I don't want to pay to much green filter works out cheaper the k&n sounds nice but to expensive where's the cheapest place to get one I would consider a secondhand one as well need help....

 

Does anyone have any independent data showing the real world difference between the stock filter replacements vs. the K&N?
I seriously doubt it makes any significant difference in power. Maybe with other supporting mods?
My only data point was with Cobb datalogs between a dirty stock filter and a replacement filter. No significant difference in airflow at all
Of course my intake had other issues.

 

The one with the bag on his head.

http://esvc000116.wic047u.server-web...hoot%20Out.pdf

 

Is or did? Thanks for the link I wish they had tested those aftermarket filters against a good OEM paper filter. The K&N may have done okay in that test but I doubt it would be better than an OEM paper filter.

 

This is what I don't understand with some of you guys, Mazda spent a fortune and time experimenting with Filter material, Box, etc...the compete INTAKE System in fact.

Everyone who "thought" they knew better (including Racing 'Experts') have reverted back to the OEM Filter...as it is the best filter.

So if all these cone and dome shaped filters are "so good", why did Mazda not go down that path?
They could have saved a lot of money..

But hey..what do they know.

 

Maybe they though the guy who designed the intake system was the same guy who decided that the Series I Renesis didn't need a third oil injector