Test your car's aerodynamics for less than $100

By J.G. Pasterjak
May 11, 2022 | Aerodynamics, C5 Corvette | Posted in Shop Work | From the June 2022 issue | Never miss an article

Photography Credit: Wrecking Force Photography

For nearly its entire run as one of our project cars, our C5 Corvette Z06 has worn some fancy aero bits from AJ Hartman, Shields Windshields and Nine Lives Racing. And while we’ve measured the effectiveness of that gear in lap time improvements, we haven’t determined exactly how the phy…

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Keith Tanner
Keith Tanner GRM+ Memberand MegaDork
5/10/22 1:29 p.m.

I'm going to set this aside for a proper read, this looks like good stuff. Magnehelic gauges are a fantastic tool to have on hand, every time I start talking about aero I end up talking about relative pressures.

Johnny_at_NineLives New Reader
5/11/22 9:37 a.m.

the really cheap way is to call us. 
We will tell you everything we know for free. :) 

k20a2DC2 New Reader
5/11/22 11:12 a.m.

I want to know more about making the aero using composites from mold making to end finishing aero project pieces whether canards to bumpers/ fenders etc Not a lot information on google but have searched in the past anyone knows any good links forums? 

Keith Tanner
Keith Tanner GRM+ Memberand MegaDork
5/11/22 11:28 a.m.

That's just "how do I make something out of composites", don't limit your reading to aero parts.

5/12/22 12:06 a.m.

In reply to k20a2DC2 :

Youtube is your friend on this one. AJ Hartman Aero, Bill's Build & Race are some of my favorite channels on that topic


fschlottau New Reader
5/12/22 12:14 a.m.

This is a great article on low-budget method - thank you!  What kind of lap-time differences are you seeing with these changes? 

wspohn SuperDork
5/12/22 11:14 a.m.

Pretty easy to do aero testing if you have a track with a long straight and a repeatable cornering technique from the entry corner.

Up here in the upper left hand corner we used SIR (near Seattle) with the longest main straight in the area.  Note the rpm as you hit the first braking marker, go change something and try again. Pretty accurate - I picked up 500 rpm between start and finish of testing.

Keith Tanner
Keith Tanner GRM+ Memberand MegaDork
5/12/22 11:27 a.m.

In reply to wspohn :

Do you think you're measuring drag or cornering speed there? Because I can see how the two of them would change your results if you're cornering at maximum speed entering the straight. If you're trying to enter the straight at the same speed, you're just measuring drag and that won't tell you anything about your ability to grip the track.

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