Hey Guys

Spal sent me a new 12 inch twin fan set up to work with its 25.25 inch wide x 17.0 ... fits the core height perfect
and has 18 rubber pressure relief flaps for optimum air flow at speed that close when the fans kick on .
I am working on a full aluminum shroud to fill the gap at each end on the core aprox 1/2 inch at each end .
this will give 450 square inches of air draw trough the core as a plenum .
The CFM rating is aprox 2900 .
this unit will have a lower profile for more room between water pump pulleys for cross flow units

I should have photos in the next day.

Don