retro-spec raised cowl hood 1st pics of development.

foreverpsycotic

Back in the game!
Jul 16, 2006
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Purchase pending on 2 things, the fitment and the looks. Both can be solved with a few on car pictures. Looks like it is coming along however.
 

Koenigturbo

Active Member
Oct 4, 2006
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I'm thinking this is a full one piece hood and not a "cut and paste" version?

important question: this was addressed before, what is the under framing like? stock I hope?
 

figgie

Supramania Contributor
Mar 30, 2005
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boricua114;1526580 said:
The reason is to cool the engine more, some drag mk3's put spacers to make the back of the hood be up higher so more heat can escape

umm

sorry dude.

that won't cool anything. As a matter of fact, that area is a high pressure zone. It will create a heck of a lot more turbulance in the engine bay than is needed. Think about it this way,

EVERY SINGLE CAR has the AC vent in that general area. If you can smell all the nastyness from outside when not reciculating, what makes you think that any air is being pulled out from that area? It is actually PUSHING air into holes, nooks, crannies etc.

Lots of "SS" packaged classic cars use that area to let the engine breath. It will not "pull" air out.
 

BigBad92Turbo

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Jun 4, 2010
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Figgie... Why do I seem to recal that on our cars that area is actually a low pressure zone. I am likely way off base. If I get around to it I should do a streamer test to confirm at speed. I agree with your statement completely, but just keep thinkinng I remember hearing years ago the hood angle and air dispersion caused low pressure there.

... or maybe I am thinking more midpoint on the hood where we commonly see reverse vents in place...
 

figgie

Supramania Contributor
Mar 30, 2005
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what you are thinking is Low pressure under laminar flow (high velocity, the hood specifically).

any sharp edges on the fore edge of the car will be high pressure zones as the air slows down. That means the window (hence why most bugs splat against the windshield) and the gap between the hood and the windshield). That is why all cars have the recirc vent in that area as the AC can pull air in without much problem no thanks in part to the high pressure zone at speed (think turbulance) in that area.

http://www.up22.com/Aerodynamics.htm

look at the "lift and downforce from overbody flow" picture. shows exactly what I am talking about ;)
 

te72

Classifieds Moderator
Staff member
Mar 26, 2006
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You know, I like it. Would give me a platform to play with for a couple ideas I have anyway... We any closer to updates Paulo? :)