Heres the link
http://www.autoreview.ru/archive/200...ase_id=4038830
So, its a good test - made by some russian sport drivers. I wouldnt tell you, that they said - Xfire is not a sport car and etc. =)
But heres the important info.
First is elevating (lift) force on some hight speeds (144 and 200 kph)
Then - the drag effect is Сх=0,39. Is very high. But the spoiler is very usefull
They dont like Xfire (with auto trans and non-srt), but the time on lap - is better than RX8 and TT. Thats funny - couse they said the reason is soft suspension - Xfire can hop on border without braking.
There a lot of intersting things - that i just cant translate.