Turbulence - Friend or Foe? |Here's a lot of Aero info, not spread in several threads

[Mighty Mira]

Originally Posted by trebuchet03

Absolutely right At least, there no research that supports this. Really, a vortex generator fixes an aerodynamic flaw in the design. Think of it as a band aid - the cure being a costly redesign or potentially difficult modification that many/most are not willing to do.

Thinking about it some more... aren't VGs and turbulators separate things? i.e. you'd use VGs if you are generating large vortexes at the corners of the car (e.g. back of a BMW). In something a bit rounder but with a rake of 20 to 45 degrees back, you'd want to trip the boundary layer with a turbulator so as to decrease suction at the back.

And with something like the Lancer, they could have achieved the same thing with a small ridge on the roof of the car somewhere.