Spoiler and Deck Height

[LMman]

So just how important is spoiler and deck height. By getting the deck lets say an inch or two higher than another guy that much of an advantage? I don't know too much about aero so fill me in!!!

[noitall93w]

It’s been discussed on here a million times. Drive down the highway and hold your hand at a 45 degree angle then 90. Tell us which feels more air.

[ZERO25]

Pretty sure billet said that testing proved a 100lb increase in downforce for each extra inch!