PMO/Weber filter element options
 

What are the options for air filters these days? Does K and N honor their million mile warranty? The rubber edge on mine is cracking and I'm wondering what the alternatives are. Thx.

And meanwhile, being basically a cotton element, what are the options for K and N cleaning solutions? Searches for K and N generally degenerate into discussions as to whether or not they are better than paper elements. I've used K and N cleaning, solution, cleaner, etc...

While on this filter subject can anyone provide the K&N part numbers to suit the PMO / Webers
Have difficulty in sizing from the K&N catalogue
Paul

Does anyone clean their k an n's?

Yes I do I use K&N filter cleaner.:D

Me too.

sorry to revive this thread. I have searched...

I have new PMO ITB's with rain shields and K&N filters. Does anyone make a paper filter element that is the same size and shape as the K&N?

Thanks

That seems to be the million dollar question :D. I have asked on several forums and no one seems to know of a " regular " filter in the correct size.

As far as I know, the K&N is the only one. If you maintain it carefully and oil it according to instructions, it works fine. I'm simply not losing any sleep over what micron size of particle is making it through. Life's too short.

Between ZDDP compulsives, filter wackos, Cool Collar hysterics--yeah, I've got one of those too, took it off my last airplane when I sold it--Magnacor fanatics, Swepco sissies and oh-god-do-I-have-the-wrong-sparkplugs worrywarts, we probably should just park our little dears and have them cryogenically preserved before we do terminal damage, like putting miles on them.

Drive the frikkin' thing.

Not at all obsessed with any of the things you mention... dont own a cool collar... run standard copper bosch plugs... however, I do prefer paper air filters... and if they made one Id buy it... just prefer to buy replacements and toss in the trash when dirty...

No paper element options for the PMO's: K&N's only.

I am working on some ITG options but those are inappropriate for most street cars.

LOL!!! Thanks Steve!!!!

I suspect K&N spec'd their housing to their custom-sized filter for a reason. I performed a serious search a few years ago, and K&Ns designed these housings to fit only their filter. An alternate filter housing that uses off-the-shelf paper filters would be a popular item.

I believe these foam filters are available from GCA Industries (True Flow) in Scottsdale AZ.

True Flow Yellow Porsche Filter 1965-1973
Part Number 85212

http://forums.pelicanparts.com/uploa...1269634136.jpg

Sherwood

Anyone use itg?

Uhhh, yes.

http://forums.pelicanparts.com/uploa...1269670068.jpg

This was a previous setup with Filtron stamped Al. housings and modified Amsoil foam filters:
http://forums.pelicanparts.com/uploa...1269670822.jpg

Sherwood

Late to the party but here is something for those who might follow...

List Price: $61.68


E-3671 - K&N Replacement Filters, Custom Air Filter direct from K&N

there is s thread on here where someone took a round fram filter and made it into a oval filter, best part they were only about 5 bucks each

Yep, but I wish I didn't ( I already had them so I used them). I think they are fine for race applications but worry about a street appilcation as I fear they will let rain water in. I spent last weeken at Road Atlanta for The Mitty and each night I had to put a rain coat over the motor to keep the deluge out. I would prefer, and will eventually get, some rain hats with K&Ns.

Info is about half-way down the page here:
http://forums.pelicanparts.com/porsche-911-technical-forum/619208-k-n-air-filters-webers-what-do-i-have-2.html

Note that the height is about 1/4" taller.

One thing I noticed on the new K & N set up vs the old K & N set up is the mounting posts are not in the same location making the lids not interchangeable and the posts are pop riveted on compared to the more robust bolted on posts in the older design. On mine one of the posts just spun around making it impossible to tighten the nut.:mad:
The old NLA version is much better. IMHO.

New and Old lids. Not interchangeable.http://forums.pelicanparts.com/uploa...1367266254.jpg

Ive been using 409 as the cleaner solution because the original K N sol smelled just like 409 to me. Still follow the instructions however, i.e. to only soak the outside of the filter while the solution is in a shallow pan, 1/4 " deep, when I lift the filter from the sol I can see the dirt fall away, then rinse from the inside out, dry and oil.
George

BTW just to add more hardware options, I recently ran across this Timmons Billet site.

Porsche

You can get some fancy brushed aluminum cover plates from them. A friend lives in Wichita and says Timmons is legit. Been in the racing business for many years and still around.

Can these still be purchased?

Thanks

merv

ITG is a good choice.

Richard Newton

Thanks Richard. I will see if they have the oval version for the early filters as above.

Cheers,

Merv

Has anyone successfully used a stock 70's style filter housing with PMO's?

You mean like this? Stock factory airbox with custom base plates for PMO 46's welded into the lower sections that attach to the carbs. I run a K&N filter in my housing and cut off the snorkel for better airflow.

http://forums.pelicanparts.com/uploa...1435181530.jpg

back about 20 years ago, I used to run a 4 barrel paper filter element that I reshaped to fit the weber bases.

PMO ITB's on '84 3.2 using backdated air box:

http://forums.pelicanparts.com/uploa...1435182952.jpg

Trog - very nice! I have plans for that in my future. I want to go to EFI ITB's, but use them with the old airbox. Easy to do with the PMO ITB's.

Thanks Brooke!

Can the existing bases be modified on a drill press vs welding? I'm at Parade so I can't get my eyes on this and I'm looking for options for my mechanic.

Eric,
AFAIK, the bases for Webers (maybe Solexes too) have the same screw hole pattern to the carb top (same as the velocity stack mounts). However, the lower "bathtub" portion of the AF housings are different and must be used with the correct upper section. The shapes are slightly different with clips in different locations. IOW, top and bottom portions must be compatible.

The Fabspeed airbox cover (painted satin black) is a nicer/quieter alternative than just cutting the snorkel too...

http://forums.pelicanparts.com/uploa...1435209327.jpg

Frankly I do not know if you can just cut a few more holes in the bottom of the weber "bath tubs" to get them to bolt up to PMO's. I didn't try that.

Hmmmm. I'll have to give that a try to see how it compares to my snorklectomy.