Screwdriver?!
I know for a fact that the HSV is good for 1:18's The "corkscrew" isn't the corner you should be worried about, there are a couple of others that, if taken correctly can make up some decent time.
The first double apex corner when you come downhill just after the start/finish line is crusial to take at the right speed and angle.
Second corner to be mindful of is the quick lefthander that leads uphill towards the corkscrew. One slipup and you find yourself in the dirt.
And last but not least. The final 90 degree lefthander leading out to the home stretch. Throttle control and correct amount of speed and angle is key to make it stick and to carry enough speed with you out on the straight.
Look at me, i turned into Yoda again....