500lbs in batteries and a quick search shows each of his motors is 156lbs. Since the gas motor he took out weighed 326lbs, he's got a net gain of ≈ 480lbs. That's a lot to overcome.
That's a 16% increase in weight and a 312% increase in power. I used to be a frequent poster on s2ki (autocross an AP1), the weight isn't that much of a hinderance when you increase power that much. Braking and turning will suffer.
These cars offer excellent balance, handling and braking from the factory. I'm guessing all of those may suffer after gaining that much weight.
I had an '05 S2000. I wish I still had it, wonderful car.
Agreed. Best car I ever had (and totalled).
Add on (or take off I guess) the exhaust system, gearbox and fuel tank and he's probably shaved a bit more off as well.