GREEN FILTER - Has anyone tried it yet?

[juniinc]

They claim this will flow better than K & N. Any feedback?

[White987S]

What's wrong with the OEM filter?

[juniinc]

Most cotton filters now are using 4 layers cotton gauze. It is a good a material for filtering but the draw back to using it is that it is similar to a gauze bandage. Holes can be warn though the gauze from cleaning & general everyday ware. Also little pieces of the warn cotton can be drawn into the engine from the intake pressure. With a Green Filter they use 2 layers of woven cotton (like a tee-shirt). There are 3 main benefits to woven cotton its: thinner hold oil better and stronger. Being thinner the benefit is a little better flow of air but with out sacrificing the filtration. (Green still filter to 5 microns). It holds the oil more evenly. Gaze is more sponge like so the oil can be pulled out by engine intake press but with Greens woven cotton you dont have this problem. The other benefit of woven cotton is that the cotton medium is stronger. Unlike a gauze bandage you cannot ware a hole though a tee-shirt just by rubbing it. One other important benefit of the cotton being woven (like a tee-shirt) is there is no way for the small bit of cotton to be pulled into the engine because the cotton is inter-locked with another piece. The biggest benefit for our woven design is that the filter can be cleaned many more times.

What's wrong with the OEM filter?

[boxs2000]

They claim this will flow better than K & N. Any feedback?

I used it on my MBZ and they were great. Where did you get them from? I did not know they were available to Porsche. let me know how it works out as I may switch my 986 to that

[juniinc]

Ok I sure will, Porsche application is available now. I believe these were actually deveoped for european circuit racing teams.

I ordered it from greenfilterusa.com

They claim this will flow better than K & N. Any feedback?

I used it on my MBZ and they were great. Where did you get them from? I did not know they were available to Porsche. let me know how it works out as I may switch my 986 to that

[Bostonduce]

ANY filter which is oiled, regardless of it's construction risks damage to the MAF.

In short order, you will see/feel a fine film of oil deposited on the air intake upstream from the filter. Some of that oil fog will eventually plate out on the MAF wire and play games with the sensed voltage. Soon you will get PSM and ABS lights and your engine will run like a '72 Gremlin. Doesn't make any diference if the filter is red, green, or pink.

Neither does it matter if the manufacturer claims some special proprietary oil made with eye-of-newt, or some other unobtanium. You can't repeal the laws of physics-although some marketing guys try.

Regards,

BD

[Loren]

ANY filter which is oiled, regardless of it's construction risks damage to the MAF.

... and any filter that allows "more air in" is likely letting in more particulate matter than can also damage the MAF.

I think it is curious that the manufacturer says these filters have a MSRP of $127 and the guy on eBay is selling them for $12.

[White987S]

Exactly, I agree with Loren and Bostonduce! That's why I asked, "What wrong with the OEM filter".

You can't get something for nothing. Why muck around with a vital part, like an engine air filter, for an $$ engine and $$$$ performance car.

[jmatta]

I run with an Evo High Flow (oiled) on my '02 Boxster S. Two years running and not a single problem. The suspect is usually the uninformed installer that typically over oils the filter upon installation. I've had K&Ns on my 911s for years, so I know the routine.

[juniinc]

yup! I also heard some great feedbacks from my local members. They just love it!

I run with an Evo High Flow (oiled) on my '02 Boxster S. Two years running and not a single problem. The suspect is usually the uninformed installer that typically over oils the filter upon installation. I've had K&Ns on my 911s for years, so I know the routine.

[mikefocke]

Then why is it

Every scientific study I've ever read of K&Ns and other such filters shows they do a significantly poorer job of preventing dirt from getting into the engine intake than the OEM filters. They all let in more dirt and bigger particles than the OEM filter. And since filtration is what I buy the filter for....why would I use one?

Why not just take the filter out entirely or use some crude wire mesh screen if protecting the engine from fine particles isn't important? After all, the wear won't show up before I sell the car, let the next guy worry about it.

[White987S]

Then why is it

Every scientific study I've ever read of K&Ns and other such filters shows they do a significantly poorer job of preventing dirt from getting into the engine intake than the OEM filters. They all let in more dirt and bigger particles than the OEM filter. And since filtration is what I buy the filter for....why would I use one?

Why not just take the filter out entirely or use some crude wire mesh screen if protecting the engine from fine particles isn't important? After all, the wear won't show up before I sell the car, let the next guy worry about it.

Well stated, Mikefocke! :)

[juniinc]

All different opinion, this is what I'd like to see!

Edited November 4, 2007 by juniinc

[jmatta]

It's all about sound! The Evo High Flow is the best thing to make your Boxster sound like a GT3 (and I drive alot of GT3s). The howl the intake makes is absolutely seductive. Whether particulate is captured compared to an OEM filter, I drive this car for pleasure; therefore, the trade off is worth it. I do not drive in a dusty, high traffic area and the car is used for pleasure only. Many high performance race motors only used screens to keep the big chunks out (they are also rebuilt after 50 hours or so).

These cars are for pleasure, so do you you want.

[juniinc]

LOL In fact I used to run my 71 Firebird with no air filter.

Then why is it

Every scientific study I've ever read of K&Ns and other such filters shows they do a significantly poorer job of preventing dirt from getting into the engine intake than the OEM filters. They all let in more dirt and bigger particles than the OEM filter. And since filtration is what I buy the filter for....why would I use one?

Why not just take the filter out entirely or use some crude wire mesh screen if protecting the engine from fine particles isn't important? After all, the wear won't show up before I sell the car, let the next guy worry about it.