Test your car's aerodynamics for less than $100

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.

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

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? 

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

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

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

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.

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.