The main issue with the current circuit is the TDF file, which specifies lots of bumps and different grip zones. I disagree with that, they have really overdid it in my opinion.
When you drive it on a ''better'' TDF file, I can get sub 20, and would probably get 8:15 if I tried many laps. WIth the default track, 8:25 is already very very very scary.
The magazine used the Z51 gearbox btw, for the last bit of accuracy
I"m pretty sure I've attached the modified TDF file somewhere here in this thread..