[puddleglum]

Power isn't the problem with using a forklift motor, it's efficiency. They are going to use more wh/km than a AC motor like all the production cars use. I agree with what has been said already the range requirement is the elephant in the room. Even if you could get a big enough pack to have a 200km range, with four people in the car, your Aveo is going to be severly overloaded. This conversion ( Electric Porsche conversion ) managed the range you want with two Volt packs, but using an AC motor and driving at less than normal highway speeds. Like Doax said, you would probably need three with a DC motor. That is 1200 lbs of batteries. Even if you could stuff them in, what hasn't been mentioned is charging them a the half way point. Unless you could get a high current charger and could leave it sit all day at a high output charging station, you wouldn't have enough charge to get home. You would never do it with a 120v charger. I'm all for forklift motor conversions, I want to do one myself. But in your case, I think you would be much better selling the Aveo and using that $10000 to get a good used Prius or some other economical car.