hood scoops, vents and drag

[ralexander03@snet.net (Rick Alexander)]

As long as we are on the subject of air flow.

I want to take air in the relatively high pressure area under the front of
the car and exhaust it out of the hood in the relatively low pressure air.
This is for one of the options I'm considering for the intercooler on the
G60 project. So what would be the ultimate shape on the hood to help
evacuate air? All options are open as I'm still thinking this out. It could
be a reverse scoop, louvers or something entirely different. I'm asking for
some expert (or at least experienced) thinking on this.

Rick Alexander
http://www.brubakerbox.com
http://clubs.hemmings.com/hams/
http://clubs.hemmings.com/vwsrus/
----- Original Message -----
From: "T Berk" <tberk@mindspring.com>
To: "calimus" <calimus@techography.net>
Cc: "Scirocco-l" <scirocco-l@scirocco.org>
Sent: Sunday, September 22, 2002 1:45 PM
Subject: Re: hood scoops, vents and drag


> calimus wrote:
> >
> > I've been seeing some rocco's w/hood scoops like adrian's recent pics
and I
> > was starting to seriously consider adding one and have it blow air down
the
> > back side of the engine to kinda cool the exhaust area.  But then I got
to
> > thinking, at almost any speed it adds drag but at higher speeds,
wouldent it
> > create so much air flow that it could actually be pushing the front end
up a
> > bit.  I don't ment some drastig ammount, but wouldn't it be enough to
not
> > want it?
> <snip>
> >
> > William
> >
>
> Besides what Adrian mentions you should consider FLOW vs air pushed
> under the car. More flow under the car makes for good things. (God, I
> can't make a cohesive thought this morning, fluid dynamic folks help me
> out here).
>
>
> TBerk
>
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