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K&N Air Filter


Lloyd

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I swapped carbs and since my last one had a straight flange and the new one has a bevel flange I need to get another air filter assembly. I am looking at the adapter and air cleaner in the links below.

http://www.carburetor-parts.com/Air-Cleaner-Adaptor_p_3016.html

https://www.speedwaymotors.com/K-N-60-1140-Air-Filter-Assembly-3-5in-Tall-Red-Round,158003.html

 

I know that the adapter has a 2-3/8 inch top and the filter base has a 2-5/8 inch opening. I read on a previous post where someone used an exhaust pipe as a shim so I'm planning on about the same. Cant seem to find a filter assembly with a 2-3/8 inch opening and I've spent the last 3 hours looking. Reading previous post it seems K&N is the filter to go with other than original oil bath seems to be a lot for those as well. But I want to go with the K&N. The question I have is how do these K&N filter assemblies mount and secure on the carburetor or in my case the adapter? I cant find any images of the base of the assembly except a few that may show a bit of it. Seems its just a short flange that slips over the carb. So if it just slips over this adapter how would it be secured? Hopefully not by drilling holes...

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I used a hose clamp to fasten the aluminum homemade base to the top of the carburetor. I then used a cheap chrome base filter mount to and clamp to secure the chrome clamp to the top of the aluminum piece. Then I staked the flexible K&N clone filters one on top of the other. and secured them with a hunk of all thread and a tobacco can lid.

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I see. So the filter assembly base just slides over your adapter. So if I get the clamp adapter and the K&N filter assembly I will need to make an adapter then fasten them together.

thanks don. Appreciate it. 

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I think you might have read my post about using exhaust pipe to create a larger diameter. What I did was cut some pipe that just fit on the 2 3/8 od of the adapter you found and then used a mr gasket 2 1/2 inch base filter with a paper element. Works fine. suspect you might find a K&N in the same size, about 6 inch diameter to use as well. I glued the exhaust pipe with JB weld into the air cleaner base. Nice fit.

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Yep that was you. The K&N’s are 2-5/8 ID base compared to the adapter which is 2-3/8 OD. I have been looking high and low for a pipe with a 2-3/8 ID and 1/8” thick wall. Don’t believe there is such a critter. I’ve found that exhaust pipe is about 1/16” thick wall. Thinking I’ll have to just get the filter assembly and adapter and start plugging stuff in to see if it fits. Trial & error. 

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On 1/30/2018 at 2:43 PM, Dartgame said:

I think you might have read my post about using exhaust pipe to create a larger diameter. What I did was cut some pipe that just fit on the 2 3/8 od of the adapter you found and then used a mr gasket 2 1/2 inch base filter with a paper element. Works fine. suspect you might find a K&N in the same size, about 6 inch diameter to use as well. I glued the exhaust pipe with JB weld into the air cleaner base. Nice fit.

Do you have a picture of it to share?

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Hi Jack - Sorry none at this time - car is in paint shop for a few more months. I can and will post some info when I get it back. I think I might have used two pieces of exhaust pipe that just slid inside each other to make the “bushing” for this thing. It’s been about 2 years since I did it - so my apologies for the brain lapse.

Edited by Dartgame
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11 hours ago, Dartgame said:

Hi Jack - Sorry none at this time - car is in paint shop for a few more months. I can and will post some info when I get it back. I think I might have used two pieces of exhaust pipe that just slid inside each other to make the “bushing” for this thing. It’s been about 2 years since I did it - so my apologies for the brain lapse.

It will be worth the wait!  

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And I want to correct my comment about the Mr Gasket filter. It is a 2 5/8 inch base. So you do need two pieces of pipe to bush the opening to the correct size. One fits tightly on the adapter and the other I glued w JB weld into the air filter base. Worked out very well.

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Found an adapter ring on Speedway Motors website that may work. Still have to use the Air Cleaner Adapter, but then hopefully I can get the ring over the adapter. It looks to be about 1/16" to small. I should be able to take that off with a small round file. Might add a couple more set screws to the ring.

I'm at work right now and will be a while before I make it back home but when I do I'll post some more pics of the result.

 

https://www.speedwaymotors.com/K-N-60-1140-Air-Filter-Assembly-3-5in-Tall-Red-Round,158003.html

https://www.speedwaymotors.com/Small-Diameter-Air-Cleaner-Adapter-Ring-2-5-16-Inch-to-2-5-8-Inch,139472.html?OriginalQuery=91511661

http://www.carburetor-parts.com/Air-Cleaner-Adaptor_p_3016.html

 

 

Ring.jpg

Filter.jpg

adapter.jpg

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