[DeTomaso] New engine

[Rich]

I have said this before and will mention it again.  The side scoops work 
great.
The pantera does not need forced air in the engine that a scoop is usually 
built for.
We really have good power with out that.
The pantera engine needs cool air.
Unless someone comes up with better scoop for forced air- the scoops in the 
windows adds cool air and makes the car runs a lot better.
I am in arizona and with the cool air it idles better and comes off the 
throttle more responsive.
If you live in the cold country, maybe it does not matter much.
Rich

-----Original Message----- 
From: Mike Drew via DeTomaso
Sent: Saturday, December 06, 2014 9:54 PM
To: jjdetrich at gmail.com
Cc: npdrs at maui.net ; detomaso at poca.com
Subject: Re: [DeTomaso] New engine


In a message dated 12/5/14 9 21 56, jjdetrich at gmail.com writes:


>
> A technical nitpick?
>
> I would expect that the smaller elephant ears that don't stick out very
> far would work slightly better than an unducted set-up. Reason: the 
> regular
> engine vacuum draws in the air it needs regardless of the source and cold
> air from the elephant ears is always better than the warmer air in the 
> engine
> compartment. Plus the disruption of the surface flow caused by the vacuum
> would probably add some ram effect but not nearly as much as the bigger
> elephant ear ducts. Has anyone actually done any testing of this?
>
>
>>>You would think so, but apparently this isn't true.   I just got done
reading a spectacular book on the Cobra Daytona Coupes written by well-known
Pantera dealer George Stauffer, and Daytona designer Pete Brock.   He 
created
scoops very similar in size and shape to the ones we are speaking of,
intending them to cool the rear brakes.   They were astonished to discover 
that
the air actually flowed backwards through them, and the drivers were getting
bombarded with heat from the rear brakes blowing on their backs!   This was
confirmed with tuft tests.

The Swedes did some Pantera tuft-testing of their own and while they didn't
specifically look at these scoops, the tufts did determine that there is a
fairly pronounced layer of 'dead' air along the windows.

Pete Brock figured out how to make the scoops work on the coupe; they
created curved plexiglass 'fences' which were mounted to the A-pillars and 
stuck
out a few inches.   They took the high-pressure air that was blowing off the
sides of the windscreen and creating the vacuum along the sides, and
redirected it so that it blew straight back, into the scoops behind the 
windows.

While something like that would likely work for the Pantera too, it would
look decidedly weird.   The more effective solution is to simply reach
further out from the side of the car using bigger scoops, through the layer 
of
'dead' air and into the high-pressure airstream.

Mike





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