PiBoSo has released the fifth beta of his Kart Racing Pro simulation, adding some new features and various fixes to the title that is scheduled to leave the beta stage soon.

Most importantly, the new version introduces the new dynamic marble build up feature that was shown off recently.

Zach Griffin has released first previews and an impressive video of his Kart Sim simulation that he has been working on for over four years now.

Kart Sim will be accurately simulating the the thrill of driving a racing kart, the starting point of almost every professional racing career. To ensure realism, the title uses an industry standard tire model and a real-time FEM model to simulate the flex of the chassis.

The title is based on the Unity engine that is paired up with a scratch-made physics engine developed by Zach. The title is planned to be released in Q1 2012, a demo and a public beta will be coming up as well. Below is the first preview video, showing off a lap around Oakleigh Go Kart Racing Club in an Arrow 28/30 chassis with a 17hp KT100s engine.