Superkarts are crazy. Hockenheim, I have not driven on that track yet, said to be brutal on the brakes.
I am getting a 3.8l motor build right now for my 911, expecting about 320 HP compared to 240 I had with the 3.2l engine. Not super fast, and my car is not super light, about 2400lbs, but should push ok. First trackday will be in April on the Red Bull Ring in Austria if everything works out.
1972 USMC M151A2 w/ROPS and M416
1962 M201 and trailer
1966 Pontiac GTO
1987 Suzuki Samurai
Gone: 2xM35A2c, Unimog 404S, Hanomag AL28, DKW Munga