More torque for my engine?

I recently finished my inline 4 engine, and wanted to use it in a rock crawler… But it cant even make it up any sort of gradient without stopping or going backwards. is there anyway that i can make it better at climbing, something like this video i found .

Please help
Thanks for the time

You can try to increase multiplier on your thrusters, if it still doesnt work;
-It might not have the right timing: Check your E2.
-It might have an unbalanced order: You will have to redo the engine. (Try using a flat-plane order.)
-Try using a larger crank for more torque.(In diameter)

ill try thanks :downs: