Quote:
Originally posted by dyno
more pics of the naca ducts please!!
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I'll have to look for more since the boat is covered for the winter. But what I did was take a 2" PVC pipe, polish it and put about 6 coats of wax on it. I used that as a mold to make the tubes that run from the naca ducts thru to the inside of the gunnel. I used West System to make the tubes.
It really helped the motors breath a little better and was good for about 3 mph. When it gets cold in the fall, the 28 Bravos that normally spin to 5400 normally spin up to 6000 rpm. I really never finished the project, I have vents that I want to cut into the transom just above the rub rail to let a little more heat out of the engine compartment.