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Author Topic: Corvette: Wind Tunnel Tested all 6 Generations...  (Read 3002 times)
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A2WindTunnel
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« on: March 19, 2009, 08:02:41 AM »

The A2 Wind Tunnel is featured in the May 2009 (Vol. 31) issue of Corvette Fever Magazine for anyone that is a subscriber or interestind in picking up a copy.  It was more of a fun and interesting test where we did a comparison on all the generations of Corvette's (C1-C6) to show how aerodynamic design has evolved from the early days of sports cars to the cars of today.

Can anyone chime in if they know where to pick up a copy ie. Barns & Noble or other?
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mtkawboy
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« Reply #1 on: March 19, 2009, 11:12:32 AM »

Hastings in Billings sells that magazine. Ill get by there today and let you know for sure
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mtkawboy
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« Reply #2 on: March 19, 2009, 04:15:43 PM »

Hastings has the April issue but not Mays yet
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Blue
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« Reply #3 on: March 19, 2009, 11:57:31 PM »

Oh, come on!  What's the ranking?Huh

Drag, lift, stability???
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"Doing the same thing as everyone else insures the same result", Shawn Fischer
"Extraordinary ideas do not come from ordinary thinking", Dan Bond
"Don't compromise, optimize", Eric Ahlstrom
mtkawboy
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« Reply #4 on: April 26, 2009, 08:03:13 PM »

http://www.corvettefever.com/techarticles/corp_0905_corvette_wind_tunnel_testing/index.html
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McRat
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« Reply #5 on: April 27, 2009, 06:58:31 AM »

They mentioned the C5 Z06 version has worse aero than the base model.  Yup, it was not originally designed to be the fast version.  The C5R roadracers used the normal C5 Fastback body, not the Z06 design.

What happened?  GM wanted to make a budget version of it's new C5 Corvette.  They called it the FRC (Fixed Roof Coupe), and it can be identified by a having a flat rear deck where the trunk is, whereas the fastback is sloped.  Well, the stripper FRC didn't sell very well.  Rather than abandon it, GM came up with the idea of turning it into racing version.  Because GM has a hard time with original thought, they regurgitated the Z06 option code (all GM option codes are 3 letters/numbers, Z28/PYO/MN6/Z06, etc) which was originally used on the 1963? model to specify disc / metal brake pads, IIRC.  The first Z06 cars weren't called Z06's, it was an obscure option code that wasn't intended for street use.  With the new Z06, you got a 3080lb empty hardtop with a rear transaxle giving about 52%/48% front to rear bias.  It came with a 6 speed manual that rattles, and the trans tunnel get hot when you're racing.  No T-top or convertible.  No spare tire, just a can of seal-n-air and directions on how to hitchhike.  Memory seats and museum delivery were the only two options available when I bought ours.  It comes with a video tape describing how to adjust the car for racing among other topics.  First version was the 2001 at 385HP, then 405HP from 2002 to 2004. 

Notice the C6 gets less aero than the C5.  GM decided that styling would play a larger role in the C6 than it did in the C5, and there are several things done for looks that hurt the cars performance.
« Last Edit: April 27, 2009, 07:00:44 AM by McRat » Logged
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« Reply #6 on: May 06, 2009, 02:13:28 PM »

It seems like the drag pretty much flat-lines from the C4 on.  The article makes a great deal out of the front end and glass fit/finish, yet the overall drag improves only minutely.  One of the C4's is the lowest drag of the lot.  The real progress seems to have been in reducing lift.  Practical car rear-ends virtually mandate separation behind the car, so the only real drag reduction left is going to be a full belly pan like Ferrari does.

It would have been really nice to see them at a few degrees of slip angle to see how stable or unstable each generation is.
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"Doing the same thing as everyone else insures the same result", Shawn Fischer
"Extraordinary ideas do not come from ordinary thinking", Dan Bond
"Don't compromise, optimize", Eric Ahlstrom
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