Those are beautiful Mark. How much money do you charge?

Do they fit 2 inch OD .065 wall tubing?

How does one fasten them to the tube?

Paul Lamar

Their were two with 42mm ID and two with 47mm ID. There is a step to slip over the tube OD, and they could be bonded, but I think Brian welded them (Right brian?)

With reguards to the bellmouth shape guys. The larger the better depends on how much room you have. The radius should continue to at least 90° to the bore and more, like all the way around, works
better. The bell end on some of the best I've seen ends up being a torus. A sharp corner at the end defeats the purpose. You have then just made a good looking funnel.
Bill Jepson

Well I modified the design a little bit. There is now a straight section.
Actually cost a little less to machine at the expensive of a tiny bit of additional weight.

Paul Lamar

Mark wrote:
Thanks for that info Bill. Brian was welding them into the air box, so the that the edge of the bell forms part of the airbox wall, that is why the curve didn't continue.

Mark

 
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