[DeTomaso] pictures

[Ken Green]

You still need either velocity or a pressure difference to get air to move no matter what the temperature is.  I know the area above the flat surface of the rear deck is low pressure, so air probably won't flow from there to the engine, but I don't know if the area above the rear of the cabin (where Goran's scoop is) is high or low.  If there is a stagnant boundry layer there at a higher pressure, then air will move and the scoop may not be needed.  I was hoping Goran was measuring some of that.
 
We are suppose to get a lot of air moving from under the car and up around the engine, so is the air under the car at high pressure, or is the area around the engine low pressure, or both?
 
The rear wheel wells are also suppose to be high pressure, so air will flow from the wheel well forward, but how much and at what speed?
 
Ken





--- On Fri, 4/3/09, michael frazier <red3644 at hotmail.com> wrote:


From: michael frazier <red3644 at hotmail.com>
Subject: Re: [DeTomaso] pictures
To: "David Adin" <adin at frontier.net>, "pantera list" <detomaso at realbig.com>
Date: Friday, April 3, 2009, 11:02 AM



I've been searching for this article for years...very concise & easy to understand test results.  In the real world, there

are greater and easier gains to be had by lowering intake temps than raising pressures.  Real world! not counting superchargers

and the like.  Just taking air from somewhere cooler than the normal engine compartment air was better than ramming air into the engine.  You get the best of both from a scoop usually, but the benefit comes from the temp drop. Reducing air pressure below atmospheric was not in the cards.  I guess you could design/build a scoop bad enough to actually lower pressure around the carb.  Whatever....what were we talking about?

Michael

Gruppo Rompiculi Corsa...BBORR...4 Panteras, 1 GT40

> Date: Fri, 3 Apr 2009 11:21:22 -0600
> From: adin at frontier.net
> To: detomaso at realbig.com
> Subject: Re: [DeTomaso] pictures
> 
> I have to agree w/ Tomas, but ask myself these questions:
> 
> If the scoop is not getting "ram air" but instead is getting "low 
> pressure" air, is this "low pressure" lower than ram air but higher 
> that atmospheric pressure? or is the "low pressure" actually lower 
> than atmospheric?
> 
> Some kind of retard,
> 
> David
> 
> 
> 
> Quoting Tomas Gunnarsson <guson at home.se>:
> 
> > I think it serves its purpose as long as the air is cool. The ram 
> > effect is probably less important than temp.
> >
> > Tomas
> >
> > ----- Original Message -----
> > From: "Ken Green" <kenn_green at yahoo.com>
> > To: <DeTomaso at realbig.com>; "Göran Malmberg" <hemipanter at hemipanter.se>
> > Sent: Tuesday, March 31, 2009 11:00 PM
> > Subject: Re: [DeTomaso] pictures
> >
> >
> >> Goran,
> >>
> >> Have you evaluated the roof scoop at high speeds? I would not have 
> >> expected you to get much air in that location.
> >>
> >> Ken
> >>
> >>
> >>
> >>
> >>
> >> --- On Tue, 3/31/09, Göran Malmberg <hemipanter at hemipanter.se> wrote:
> >>
> >>
> >> From: Göran Malmberg <hemipanter at hemipanter.se>
> >> Subject: [DeTomaso] pictures
> >> To: DeTomaso at realbig.com
> >> Date: Tuesday, March 31, 2009, 1:42 PM
> >>
> >>
> >> I got a few new images on this site. If you got nothing else to do, 
> >> why not take a look.
> >> http://www.garaget.org/?car=40839
> >> Goran
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