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Old 08-24-2007, 11:20 AM   #1
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Default aerodynamics article

Lots of good info to soak up... but the graphics are very low rez, so you'll have to use some intuition.
http://itforum.improvedtouring.com/f...pe=post&id=239
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Old 08-24-2007, 11:34 AM   #2
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good read. I wonder how much of a difference this makes on our cars at a mere 80mph max or so on the track.

On a side note, I had an Audi tt-225 for a couple years. It was unreliable shitbox. I did my one and only track day in that car and the front air dam broke off at like 125mph. That car changed dramatically, even in low speed corners. It was almost undriveable with understeer for the remainder of the day.
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Old 08-24-2007, 12:47 PM   #3
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Quote:
Originally Posted by hustler View Post
...and the front air dam broke off at like 125mph...
holy ****!
That's the kind of **** that makes you crash at that speed with any offset load.

I haven't done a whole lot of aerodynamic testing- but I do remember removing a rear wing off the deck lid of my 99 (155rwhp) and almost spinning as I can thru turn 12 at Rd Atl (90mph) because so much downforce had been removed from the rear. The wing was doing a real good job of hiding a poor alignment by keeping the rear planted.

The NA Miata's front end is an atrocity when it comes to cutting through the air at speed. Just look at the differences between the NA and NB... like the frontal tire exposure. The NA has about 1/3 of the tire face exposed to oncoming air and air rolling around the nose. I bet something like the wizdom noze would be a big improvement.

I also think there's some good info in there about managing pressure areas under that car- what's that undertray really doing?
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Old 08-24-2007, 01:03 PM   #4
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Quote:
Originally Posted by m2cupcar View Post
holy ****!
That's the kind of **** that makes you crash at that speed with any offset load.


I also think there's some good info in there about managing pressure areas under that car- what's that undertray really doing?
yeah, it was scary. I looped it through the dogleg of the nascar track (ALMS course) and went through the grass...in a $42k car.


I don't know what approach to take with the undertray. I have the begi scooper and they recommend pulling the tray. I'm going to attempt to run without the tray at first, then make a custom one if need be.
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Old 08-24-2007, 01:04 PM   #5
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Old 08-24-2007, 01:32 PM   #6
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thanks for editing my sig...bitches...lol.
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