drag come from an additional spoiler that adds more weight on the car (from the additional down force its providing)
Mario, that's not right either... The spoiler creates down force, NOT weight!! If it was the same thing, you could just put tons and tons of iron, for example, in the trunk of the car, and it would be the same as putting a spoiler.
You don't see the F1 engineers developing heavier materials to make the car faster, right?
What you want is to have down force, so that the car grips, but without increasing the car's inertia. That is what the spoiler does. The down force created by the spoiler DOES NOT affect the inertia of the car.
Originally Posted by Enzo250GTO
I get the concept of more down force slowing a car down. This will only effect it's top speed and not the acceleration (unless it adds lots of weight).
That's not right either... The down force doesn't slow the car down. Drag slows it down, not down force.
And adding a spoiler will affect both the top speed and the acceleration. The car will be slower, and the top speed will be reduced.