[Whaler]

Hi Don
Interesting to hear about the foam blowing over on high speed and your fix
I got to thinking about that. Is there not a chance that before your fix there could have been forces from both the high speed wind and the added action of the decent volume generated by engine vacuum?
We all know that the sucking/collapsing force on the inside of your "foam box" (caused by engine vacuum) will increase as the force's available inside area increases. I therefore think you may have seen the effect of two forces working their evil together. Re-inforcing the walls from the inside with aluminum would have worked as well.

Using your idea of an aluminum sheetmetal wall on the inside as a backing for the foam seal, tall enough to work and just shy to maintain the nice upper sealing edge the foam may provide to the hood.
(As you said you glued the foam to the outside face)

We know they provide wire ribbing in hoses so they cannot collapse under suction or vacuum.

I enjoy this particular topic and the 3 page read because I have yet to buy my air cleaner for my ride.

Tim