Originally Posted by
mxfred
More drag =more downforce.
Surely not! Drag has nothing to do with downforce, it's just resitance against the froward movement.
Drag can also produce lift, which a lot of the air, that gets under our bodies does.
I once did a bit of oval racing with truck bodies.
I built an underbody that connected to the upper body almost all around the car, with a rear diffusor.
Keeping the air out from under the body, allowed me to run without the usually absolutely necessary rear spoiler.
The car had more downforce and less drag, which made it a good bit quicker on the straights.
In nitro racing, this is not possible, because we need the cooling air under the body.