Jerry Feather

Well, I spent some time on the phone and then went out to one of my metal suppliers looking for a piece of 4 inch tubing in aluminum with a heavy wall, about quarter inch thick. The phone call resulted in a response that they could find me a piece about a foot long for $88. The other supplier didn't have anything but 4 1/2 inch tubing, or it might be 4 inch pipe, also aluminum. So, no go.

Then after I got home I looked in my own aluminum scraps and found nothing like what I was looking for. Then it occurred to me that maybe the best idea would be to make just what you referred to in the first place, and that is an adapter.

I do have a short piece of aluminum round bar that is 4 inches across and about an inch and a half long. With it I think I could make an adapter that is the 3.75 inches od on one end for the 5/8 inches called out and leave the other end, about an inch long or whatever, at 4 inches. Then I could bore it out to about 3 1/2 inches id or even a little more leaving at least a sixteenth inch wall on the small end. And then the big end could even be bored out a little more, depending on what it is going to connect to.

Or the big end could be turned dowm on the outside to anything else less than 4 inches to slip fit or weld fit to whatever you are going to connect the adapter to to join with the air filter housing.

This whole project needs a little more design work, I think, so we can decide some of these additional variables.

Let's have a look at the whole design, about now, if you wish.

Jerry Feather

Jerry Feather

In other words, Jake, there is enough material in the chunk of aluminum round bar that I have for you to turn one end to the 3.75 inch size to fit in the u-bend, and then turn the rest that is 4 inches diamater to whatever shape you might need to slip or wled something into or onto or over it to extend to the filter housing. I would think the possibilities are extensive in terms of what that might be, but also depending on the fitment to the filter housing that you say is 3.8 or 3.5 inches in diameter. That is where the design work need to be done.

Then, we need to be concerned about the nature of the inside track for the air so that we are not interupting the flow in some way, such as ridges or sharp angles and reduction in size.

Jerry Feather

Ducman82

i sent a drawing to the guys at Burnes steel. they can make a "neck down" from 3.75 to 3.5 out of stainless. waiting to hear back. the neck down would solve the air flow issues... more of a neck bigger as it would be getting bigger from the filter down......

I'm going to hit the drawing board some more tonight and see what i can come up with.

Eplebnista

This has potential. Take a look at the drawings - there is a provision for an 0-ring on the outer circumference. No idea about cost, but really trick looking parts in general.

http://fluidcontrol.net/weld-ferrule...ule-w903b.html