Hi Guys,

My first time posting here, I have an old HPI RS4 that I barely use. It has a broken pinion shaft which is proving difficult to get hold of and I thought I could convert it to an electric as I could do with less noise and oil, also, I have a bit of time and could be a fun little project.

I dont want to spend too much on it as I dont have too much time to go out and actually use it. I have found a cheap chinese made brushless motor & ESC comvo that I would like to use.

Specs are as follows:

Features:
4 pole 12 slot high-torque motor design
3.175mm shaft diameter
High purity copper windings maximizes efficiency
Precision engineered for maximum energy conversion
Precision balanced rotor,smoothness for best reliability and maximum RPM
Mutiple protection features: Low voltage cut-off protection, over-heat protection, throttle signal loss protection
Bulit-in 5.5V/3A BEC
Suit for 1/10 scale RC car

Motor Specifications:
Brand name: GoolRC
Watts: 900W
Max voltage: <12V
Max Amps: 75A
KV(RPM/Volt): 4300KV
Max RPM: 50000
Diameter: 36mm
Length: 50mm
Shaft length: 15mm
Shaft diameter: 3.175mm
Plug type: 4mm golden banana plug

ESC Specifications:
Brand name: GoolRC
Item name: waterproof ESC
Continue current: 60A
Burst current: 320A
Battery: 2-3S Li-Po / 4-9S Ni-Mh Ni-Cd
BEC output: 5.5V / 3A
Power supply plugs: T plug male
Motor plugs: 4mm banana plug female
Dimension: 50 * 35 * 34mm / 2.0 * 1.4 * 1.3in (without cables)

It is my first time attempting such a thing so im not sure if the above motor & ESC would be suitable for the convertion. Also what batteries would be suitable to run such a setup? Could I use NiMH batteries as I dont use it much and would want the maintenance of LiPO.

Thanks in advance for your help guys!