hood scoop theory 101 ??

Poppycock!!

so it

A second or two?? In your wildest dreams:) Doubt you would see or feel the difference.

Al

FYI: Not sure what model Mach I you are referring to in this article.

I think the drag created by hood scoops would be insignificant in a quarter mile run.

Yet another $.02 worth from a proud owner of a 1970 Mach 1 351C featuring a functional "Shaker" hood scoop @

I have heard that a scoop in the middle of the hood is NOT functional.Primary reason is that at speed,the flow of air is sent OVER this location after inpacting the front of the car.This is supposedly why GM came up with the reverse scoop facing the windshield (on what,the firebird?)where there actually is some pressure to be utilized. But in either case I think it was mainly a marketing ploy. Best....Brian O.

The 1984 Mustang GT employed this as well. I'm still not sure it really helps . I know there's a little air pressure there, but the idea is to get the ram-air effect, which is impossible if it has to curl back behind the scoop.

I doubt that all of the air is directed above the middle of the hood, and that it depends on the shape of the nose. The more aerodynamic the nose, the more air that will be travelling straight down the hood.

JS

Cowl induction on the Chevelles and el Caminos. Firebirds had the scoops placed way up on the front of the hood. Olds had their intakes under the front bumper. Also, Chrysler raised their front-facing scoops about an inch to place them into that deflected airflow. Of course this was on non aerodynamic styles. Today's vehicles are so areodynamic I'd thing the flush-mount scoop would work fine.

Re:

As far as the structual integrity of the hood is concerned; as long as the scoop was installed correctly it's not an issue.

As far as what the scoop in the center of the hood will do for you is negligible and possibly even hurt. Getting any significant boost to offset the drag is almost impossible. Most of the available boost is at the windshield from the other direction... And under 100mph it is unlikely you would see any significant boost. It's for looks only. As far as taking a "second or two off quarter mile times" forget it with ANY form of ambient boost.

Jim SR Racing

I think the latest mach-1 model has a functional shaker hood scoop. It's more a marketing thing than anything. I doubt you would see any increase in power. You will not get 1 or 2 seconds off the quarter. Remove NO-SPAM from email address when replying

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1. any scoop properly fitted/attached (meaning many more than 4 bolts) would ADD to the integrity and rigidity of the panel, hole or not
2. a hood mounted FUNCTIONAL induction scoop mates to the air cleaner housing, radiator flow "be dammed"
3. Blunt-front designs definitely require the intake at the leading edge of hood or facing and close to the cowl to pick up the compression wave there.

- unless you stick it on a pedestal like a blown drag car, that is

design placement of a scoop opening on a given car isnt rocket science, either... think "manometer" which any residential/commercial heating or A/C tech carries around in his truck

- rule of thumb: with cowl heater inlet, airflow into cabin with heater blower disconnected, windows up at given speed. There is less with blunt- front (eg Fairmont) than, say, the fox-mustang profile.

- - - - -- - - - Thinking you missed a decimal point on that time, though that would be "best- case" in itself.

The center of the hood is actually a LOW pressure area. Probably one of the worse places to put a functional hood scoop.

Unfortunately, the shaker hood scoop used on '03 and '04 Mach 1's, has it opening just about dead center on the hood. :(

Because of the scoop's opening being in a low pressure area, it is quite possible that air just might get draw out, instead of in, under the right conditions.

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