seriousloy that outrunner and the cells you will need - did the spread sheet power to weight ratios etc - it adds 33% mass to the stock car and its power levels start to look pretty lame and it is VERY innefficient at the amps te car will run at most of the time - but then at 2.3kg its a hell of a heat sink.

If you can change direction smaller motorswill do the job better and not require the sort of strengthening the proposed motor will require. It will be quicker and more nimble .