Ian, that Rallycross car has a 26 kWh (160 kg) pack and can run for “10-15 mins”.with 540 hp (400 kW)
Formula E race cars run at 250kWmax for 45 min using a 56kWh (250kg), pack
BUT.. as you know, both those series are run on short, low speed tracks. ..Formula E is deliberately done that way to both minimise power draw at high speeds, and maximise regen opportunities ( street circuits with many 90 deg turns and short straights.
F’ E is pretty much also an “Eenergy management” competition with cars often running out of power before the end if they run too much power , too often !
My point is ..even with super aero bodywork on F’E cars, very low weight, and only 250 kW max power draw, they still use 56kWh in 45 mins...so if you run sedan aero, 50% more weight , double the power draw, reduce the regen oportunities, ...what happens to that run time ?.....closer to 20 mins i suspect even with a 56 kWh pack.
Similarly with the rallycross car. The Tesla has more power, more weight, higher speeds for much longer, etc
...so that 26 kWh pack is not going to last “10-15 mins” ....maybe 5-10 mins
VW used the 43 kWh ID R pack size for its ‘ring record run, and reported that it used 25 kWh for the lap
https://www.greencarreports.com/news/11 ... record-too
i doubt the power demand is any less than PPeak ...a motor can only draw its max power no matter if its going uphill or down....the accelleration and speed may change, but not the max power draw. Infact the time spent at higher speeds on the straights at the ‘ring would probable result in more energy used
However the PPeak run was 2 min (30%) longer than the ‘ring lap, so the VW would likely have needed most of that 43 kWh to make it.
So, it seems very unlikely Tesla will be able to run much less than a 30kWh pack for a single (8 min) lap....and that is with little margin.
If i were making the decision i would go with 40 kWh so as not to be the guy who has to explain why the car ran out of power on that last straight !