My 2.4 L with Weber 44 IDF carbs, came with no name air filters. Could not find a source for the weird sized ovals and decided to replace the entire assemblies. I found a kit from K&N made for the Weber 44s (K&N 56-1170). Didn't think much of the flimsy quality but better than nothing - or so I thought.
After I installed them I drove around very little, maybe 50 miles at most before the 914 went into winter storage. I noticed one of the tin caps had lost the screw - I hope like hell it fell out onto the road and not someplace where it can do damage.
I know I tightened them down to the point where I was afraid I would crush the filter or bend the tin cap. Checked the other side that still had the screw, it was not as tight as I had originally made it. It too had backed off. Took off the cap and pulled out the filter element on the carb where the screw went missing... WTF? it is warped? Looked closer and the damn thing is full of holes. Like some have said an old sock over the carbs would be better than a K&N filter. See the photos.
Not going to have the screws fall out again - I replaced the taper flathead screw with a screw from below (with red loctite) and jam nuts on top of the tin cover.
I have joined those who hate K&N - never again. So much so, that I want to get rid of them and replace them with something more reliable that actually filters air.
I need some help sourcing air filter assemblies for Weber 44 IDFs. Is there anything you would recommend, readily available, that is a better filter (paper element?) and looks nice?
Mine came with Dellotoro brand filters & 2 bolt mountings
Yeah i am used to seeing the two bolt versions. One is weak. Did yiu use blue loctite? May be helpful. See below how i did them for my six. Drilled holes in the wing nuts and use spring as retainers. Effective and easy.
The holes in the filter are purposeful but totally get your frustration.
ITG makes a nice product and elinates you warping issue. However they dont offer much rain protection as they are a foam like material without top shield as i recall.
Now that i think of it you could easily do the wing nut setup with a single post as well. Drill a small hole in the edge of the cover and attach spring there.
And btw that is a nice looking setup you have there!
I got my stuff through CBPerformance. I haven't had them on that long, but they aren't coming off, and, so far, the filters have held up well. The only caveat is that these housings have a much thicker baseplate, so you will almost definitely need to buy the longer studs, which are as follows:
7218 Long Velocity Stack Securing Stud (6 x 50)
Bummer about the filter gap, not much you can do about bad QC.
On my car with IDFs I use a rubber o-ring under the top nut. This helps it grip a bit and not back out so easy when the flat 4 is shaking while running.
ITG or RamAir filters are probably the most free-flowing, and they're washable. I've only used them on racers, but see no reason they wouldn't be good on a street car.
K&N not necessarily bad for what they are but expecting high flow and high filtration are at odds with each other.
The holes you’re seeing in the rubber surround are a defect and should be sent back for replacement.
With a single nut you would be better off using a Nylock nut than jam nuts. Nylock will be far better as resisting loosening due to vibration.
I second the CBPerformance stuff. The K&N stuff is just too flimsy.
PS: I notice the round hole in the engine tin on the left. Will it be used for something? If not, I would recommend plugging it to improve your cooling by keeping the high pressure cooling air and low pressure exhaust air separate.
I found cleaning and re-oiling the K&Ns a messy hassle.
Ancient thread but it will give you an idea of the high dollar CSP thing I was referring to.
No idea how well this works or fits, just aware of its existence.
Where does that ship from? Individual, conventional paper filter, assems cost a lot less than 1k+ a pair. What is a ‘Porsche Style Fan’? Like the
FAT style one? Free shipping for a set from CIP1.
The CSP air box is an interesting setup. Expensive and it may or may not fit the 914. It would be a gamble and having to modify it to fit is not something I want to add to my list.
I am not against the K&N "style" or "type" of set up with the oval filter element. I did have an issue with the quality of the K&N made filter and the flimsy K&N made housing assembly. Hence my calling them garbage.
The CB Performance aluminum assembly looks much better as far as quality and design go and is about the same price as what the stamped tin K&N setup cost me.
I would like to avoid the mess of washing and oiling reusable elements. Anyone know of filter elements for this style of housing that are for one time use (not washable)?
I would bet you could find a round paper element filter the same diameter as the oval K&Ns and squish them down to fit in the housing.
CSP does (or did) make a cleaner for a Type IV. @http://www.914world.com/bbs2/index.php?showuser=11329 has one.
And if you are interested in going my crazy route that @http://www.914world.com/bbs2/index.php?showuser=22428 mentioned, here's more info:
I sell ITGs
I saw Ralphs CSP setup and it is very very clean. Looks amazing.
@http://www.914world.com/bbs2/index.php?showuser=209 i may want to switch to ITGs...
I wanted to try these from ram air I put one on my fire breathing b2000 and like the quality
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