I'd hazard a guess that it could overheat even faster if pushed to the performance limit for prolonged time. Note that this perfomance limit is now higher. Motor is capable of outputing upto 33% more power at given rpm but efficiency gains are about 10 times smaller - only around 5% - so the motor *could* produce upto arround 20% more heat than v1.0 drivetrain but achieving that is whole another issue. To be trackworthy cooling upgrade will nevertheless be mandatory.