[DeTomaso] Elephant ears

Tomas Gunnarsson guson at home.se
Thu Jun 18 02:57:06 EDT 2009


Jack,

That test was not included in our session. I don't know of any other published Swedish flow testing.

Tomas

----- Original Message ----- 
From: <JDeRyke at aol.com>
To: <wdemelo at cogeco.ca>; <detomaso at realbig.com>
Sent: Thursday, June 18, 2009 12:21 AM
Subject: Re: [DeTomaso] Elephant ears


> In a message dated 6/17/09 11:17:03 AM, wdemelo at cogeco.ca writes:
> 
>> Who sells elephant ear scoops for the rear quarter windows? Are they all 
>> the same or are some bigger than others? I'm looking for some that don't 
>> stick out too far. And yes, I know that they need to stick out to get the 
>> "ram air" effect, but I'm more concerned about the access to cool air.
>> 
> There's more to it than that. The Swedes did flow tests a while ago that 
> showed the flow is OUTWARD thru the side openings until rather high speeds. 
> And thats a good thing 'cause no one that sells the ears tells you to drill 
> and metal-screw the chrome window frames to the body. Mad Dog ran them for 
> some time before he worked his way up to about 150 mph- and the whole window 
> frame ripped out of the car at a Silver State event. He never did find it... 
> So yes- if you get moving along smartly, they do scoop air. But at reasonable 
> speeds, the rush of air from under the car outward thru the rear window 
> opening will cause air to go out the scoops, not in, so any cooling gain will 
> be iffy. As sealed units with hoses to a carb top, I'm not sure what will 
> happen to the carb mixture. 
> Your choices are small 'side scoops', large 'elephant-ears' and smooth 
> 'gridded covers' that include a gas flap ('73-up), all of fiberglas. All the 
> vendors sell them. On street cars, all are purely decorative but if the window 
> glass underneath is removed (and not all are!) the glass is 6 lbs off the 
> car weight. Good luck- J DeRyke
> 
> 
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