04-22-2012, 09:03 PM
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#1 (permalink)
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Master EcoModder
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Care to guess CD factor?
I just wanted some opinions on what you think the CD drag factor would be on the Lola T70, and, or replicas. (just this coupe body) 
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04-22-2012, 09:26 PM
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#2 (permalink)
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Master EcoModder
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.5 due to downforce?
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04-22-2012, 09:41 PM
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#3 (permalink)
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EcoModding Lurker
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That
or worse. The first Porsche 930 turbo Carrera (whale tail) generated around 750 lbs. of downforce at 120 mph. The above has much more front and rear down force square footage.
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04-23-2012, 12:26 PM
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#4 (permalink)
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Master EcoModder
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the vast majority of drag is usually in the back of the car.
The back of that car is HORRIBLE for drag - they were after downforce for the back of teh car at any cost of drag as horsepower was basically unlimited in that era.
Most racing cars are REALLY after grip - and grip is FREE with downforce.
You need to look at bonneville cars for inspiration.
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04-23-2012, 02:16 PM
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#5 (permalink)
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Master EcoModder
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Quote:
Originally Posted by GRU
.5 due to downforce?
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At least 0.5, probably a lot higher. But minimal frontal area.
You could put in a little diesel engine and a 50 MPG sticker on the back, and watch the car nuts go berserk.
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04-23-2012, 07:28 PM
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#6 (permalink)
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Master EcoModder
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Lola
I would guess it at over 0.60.
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04-23-2012, 07:48 PM
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#7 (permalink)
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Ultimate Fail
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I see a lot of potential in that car though.
The rear swings up . Just remove it and build a fiberglass extension for it.
This would not only help aerodynamics, but rear visibility as well.
Stock, the visibility was horrendous .
A boattail just like the one on the Olds Aerotech would look right at home.
No odd stares either. Thumbs would go up.
I've always loved the look of the Lola.
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04-23-2012, 07:53 PM
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#8 (permalink)
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Ultimate Fail
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YKYAEM when you admire that car for its windshield instead of the engine.
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04-23-2012, 08:04 PM
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#9 (permalink)
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Ultimate Fail
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Gulf-Mirage 1967 To 1982 - Ed McDonough - Google Books
This source gives the car a Cd of .395
I seem to remember reading the current generation GT-40 was tweaked down to .36 if memory serves me right.
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04-23-2012, 09:43 PM
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#10 (permalink)
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EcoModding Apprentice
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The book Competition Car Aerodynamics puts full blown Formula 1 cars at between .7-1.1CD depending on what track they were set up for. The books forward was written by a Formula 1 aero engineer whos been working in F1 for 20 years.
I would guess .5, but i could believe it being what cd listed above.
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