This car belongs to one of my best friends ('Geux'), I'm driving it this day on the Nürburgring Nordschleife.
On pretty much all important corners/turns people are driving in my way in this video (causing me to have to overtake on the outside and leaving the throttle, thus loosing several seconds), on top of that Carroussel on the outside (to keep the car in 1 piece), yet 8:39 on the 4th lap with the car/suspension set-up.
Best time I've made wit this car (still on street tyres (Bridgestone RE050A)) is 8:26; without a passenger sitting next to me. Not bad for a front wheel drive car without a cage (too much torsion in the car..) and too soft suspension (several bumpstop hits during the lap).
A decent cage, suspension and semi slicks should shave at least another 15 seconds of.