Originally Posted by J Wikoff
The dimples actually create turbulance that helps bring moving air around the back of the golf ball effectivly reducing drag area. It'* interesting, I've never noticed it on a vehicle before. If it actually works in this aerodynamic case, it'* a great idea, IMO.
Yup a slight dead air zone around the surface.. The GTI actually has an underbody tray underneath for aerodynamics and some front brake cooling ducts, it'* slightly dimpled, not as deep as that electric car.