I went to the speed weekend, which is what the first post was referring to, last year. Awesome fun, social day out but not much track time. Still, it's cheap and you get the social aspect. It's the first weekend in December every year.
Re the sprint down conrod, I just hit 200km/h before and through the kink (is that the chase?) with a good launch.
Tyres, I used were semis. You can do a burnout just before you take off and when you drive down to line up you do those weaving, deliberate understeers to warm up the fronts. It does work but it's not great so I didn't totally trust the tyres until halfway through. Streeters would be just like on the road except it's a nice smooth surface. You'll be fine.