On the older Camaro's with the cowl induction hoods (and several other
vehicles), the air would swirl in a forward motion at the cowl area and some of
it would actually be forced into the cowl opening on the hood. The air
cleaners under neath the hood also had an inlet for the cooler air from the
opening. They worked well but were only considered as a form of "Cold Air
Induction".
On those 7-9 second cars, I've seen a majority of them with Cowl Induction
hoods (3" - 5" rise). On the ProStock and Top Fuel vehicles, they have the air
intake snorkels facing forward for a true "Ram Air" effect. Since they're
looking for .001 second differences, this is the way to go at those high speeds
(250+mph).
- Bernd
> The air, I believe, does not push into the back of a
> cowl hood, but it is sucked in by the vaccum pressure
> created by the intake. Even with a hood with nostrils,
> it is not the air being pushed in to the intake, more
> the intake sucking in the air. These hoods provide the
> most efficient way for the engine to access cold air.
> A front-facing opening may push air in more, but I
> believe the effects would not be very noteable. Maybe
> I'm wrong, just my 2 cents....Seth
>
> --- Michael Kuriger <michael@isuzu-mods.com> wrote:
> > The area in front of the windshiels is low pressure
> > on most vehicles. air
> > should exit the hood at this point, not enter it. I
> > say should because
> > that's how it is intended to work. I'm not sure
> > what type or aerodynamics
> > come in to play on a truck.
> >
> > But I doubt air does a 180 into the cowl hood. but
> > maybe it does?! does
> > anyone have any hard evidence of which way the air
> > flows through these hoods?
> >
> > Now I'm not sure!
> >
> > --
> > -=Mike Kuriger
> > 1991 Isuzu Impulse RS 1.8
> > 2000 Dodge Durango SLT 4x4 4.7
> >
> >
> >
> >
> >
> > Ronald Wong wrote:
> >
> > > Actually, it sucks air through the opening between
> > the windshield and the
> > > hood.
> > >
> >
>
>
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