Air flow through hood scoop

[Badger]

77..you're right, these are all good points, but the fact remains that the position of the scoop on the hood is still in a "transitional area" where the pressure is not positive enough to really make a performance difference. Sealing the underside will help, but simply reversing the position of the scoop on the hood makes a big difference, as the intake will now reside in a positive pressure area. As far as tuft testing goes... I did all that on the first Daytona Coupe (not exactly the same issue here) but was astounded to learn that the air intake at the base of the windscreen had created so much pressure that the incoming air was actually pushing the sealant foam away from the edges of the turkey pan! (I'd already determined, on the roadsters, that the air intake was in the wrong place, so I put the intake on the coupes back at the base of the 'screen) This "discovery" was important because if we hadn't learned this at the first test the engine probably would have leaned out at high speed and burned the pistons! The simple solution, as can be seen in early test photos of CSX 2287, was simply to drill a few holes in the front of the "blister" . The pressure was still so great that fuel dye from carb "standoff" can be seen flowing from the front holes! The fun thing in "reversing" the hood scoops on a roadster these days is going to a modern Cobra meet and having all the so called "experts" thinking you were so dumb in assembling your "kit" that you mounted the hood scoop "backwards" :0) Peter Brock