during throttle, car accelerates not straight
 

Hi there,
my DRR does not take off in a straight line when pulling the throttle. The back of the car shifts to the LEFT side. I think it has something to do with the adjustment of the ball-differential.
I'm driving it on a wooden floor.

During 'steady running' of the car , it does drive in a straight line.

Can somebody help
thankx

Yeti

Europe
The Netherlands

Your diff may need to be loosened a bit. Try 1-2 turns with a screwdriver to see if that helps. (you can access the diff adjustment screw through the right rear wheel) Another problem you are probably having is that the stock rear tires are a little too hard for your driving surface. Softer rear tires should help. Make sure you change only one thing at a time on the car and make a note of what changes you make. That makes it easier to add or subtract changes you make to the car until its right for you and the track conditions.

Try accelerating slower. If you give it full throttle from a stop, it might be losing traction. The stock wheels are not very grippy.

a bit off topic, what other tires can be used for more traction?

foam tires. Search for Rocket Racer at horizonhobbies.com