[e36clubracer]

Regardless of the actual science behind this. For the non pro driver aero makes the car easier to drive faster. Basically it’s more stable at higher cornering speeds. So while a stupid wing on the trunk doesn’t seem like it should do much it can actually add seconds to a non pro driver. It’s totally plausible it could add 2-3 seconds a lap.

If you did the same testing with a pro driver who can bang out laps .1 to .2 seconds apart you’ll likely see a marginal difference....