Hi studysession - cool project!
I've thought some about what would be necessary to convert a 1/8 scale gas truck to electric. It would be a very fun project, but I don't have neither the money nor the time necessary...
What motor will you use? What about the power source? What kind of performance do you expect from the car?
I looked through the data of some typical 1/8 scale gas engines, and they seem to have a power of around 1 kW. I would want my (hypothetic) electric car to have the same "kick" as a gas powered one, so 1st problem I guess is to find electric motors of 1 kW that aren't too heavy or bulky. Small motor means little torque, so to get the power a high RPM is needed. And gearing. I guess that fits nicely with the fact that the gas engines are around 30000 RPM?
Then the problem of power source... 1 kW is a lot of power! I would go for as high a voltage (= as many batteries) as possible. 20 1.2 V batteries would give a current of 42 A for 1 kW... hmm.
Please report on your progress! I'm really curious!