Submitted by jonerickson1 on July 17, 2013
From what I understand, the motor in the Model S is limited by the size of the battery and the inverter. The 85kwh cars have a constant torque of 443 ft-lbs. If you assume the torque stays at that level up to the 16,000 rpm limit, the maximum power of the motor is 1350 hp. If they upgraded the battery and inverter, could the current motor reach this limit? Here are some rough calculations with a lot assumptions.
Torque = 443 ft-lbs
Max RPM = 16,000
Hp = T * RPM/5252
Peak Hp = 1350
Kw = Hp*.746
Kw = 1006
Kwh = kw/C-rate
Kwh = 1006/5
Kwh = 201
Kwh = 200
$/kwh = $240
Increased cost = (200-85)*240 = $27,600
EPA Range = 265/85*200 = 624 miles
Another question is would you select this option?
Would you rather see AWD with two separate 416 Hp motors?