Dick, there is a high pressure area at thebase of the windshield,not a
lowpressure area. That helps to force the air into the plenum. BUt,
scoops add drag so you have to make sure that the one you select has
enough pressure recovcery to make up the hp loss fromthe added drag.
Harwood comes to mind. If you can seal the back end to the windshield
then you will cut some of the added drag.
mayf
Dick J wrote:
>Are Mayf and I the only ones working on our cars in the off-season? Nobody is
>saying much this year. I changed from a 4150 Holley to a Quickfuel Dominator
>and had no idea it would domino so many changes. After making new linkage and
>routing new fuel lines, I find that I have to change the hood scoop. Since I
>will no longer have the luxury of a built-in air pan on the carburetor that
>the Trans Am shaker provided, I've spent the last week cutting pieces of
>aluminum and riveting them together to make what amounts to an oversize paint
>roller pan with a hole in the middle.
>
> So that brings a question to mind. I've settled on using a Pro-Stock aero
>scoop with enough height to put the top of the scoop ten inches above the
>mouth of the carburetor. So, why do LSR racers tend to put the scoop openings
>facing rear on door slammers? I understand that there's a big low pressure
>area behind the scoop and in front of the windshield, but what's so great
>about that. Why not take advantage of the high pressure built up in the scoop
>by facing it forward? Two hundred MPH formula one cars face forward. Drag
>boats face forward. Off-shore racers face forward. Three hundred MPH drag
>cars face forward. But, LSR cars face them backwards? What's up here?
>
> DickJ
> In East Texas
>
>
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