[Floordford]

Is there an ideal angle to try to get? What angles do what? Like do steeper angles tend to cause more downforce and drag than shallower angles. Just trying to get an idea of what to do before I start trying to set up templates. Seems that all the diffuser info I keep finding is aimed at the racing folks that want more downforce. Downforce in the rear to me seems that it would cause drag or vacuum. Obviously what im trying to avoid.