0aoa = 0 degree angle of attack. the data is on the APR site.
http://www.aprperformance.com/index.php?option=com_content&task=view&id=181
I must be at least at 15degrees since I took the wing and adjusted everything to the max. And then took the 2" extensions and put that at whatever max angle I can get.
All I know is at high speed turns I'm more concern with losing oil pressure than traction.
When I take fellow NSX guys out rides in my NSX and allow a handful to drive mines they all are 100% sold on the benefits of downforce and that my spoiler absolutely works, even in lower speeds.
I can even tell from watching the guys in my rearview mirror how much their NSX seem to struggle when I take turns at freeway speeds.