For the royal ranger class we had a race at ECD.
It was a lot of fun.
Use The block for drilling the holes.
The 4 or 6 spoke wheels. One of them is better. The ones that are smoother are the best.
Wheel selection/prep. You should select wheels that are co-centric with the bore.
If you can use larger diameter screws you should.
Drill rears and fronts with no cant. It is like using razor wheels.
Raise one front wheel.
For a center guided track steer into the rail like in my post above. However on edge guided track such as the one in the video above. Two strategies:
Run Straight. (Safest and very fast)
Steer DFW (Dominant Front Wheel) towards the outside rail.
This may flop, may pay big and win. Likely not needed.
I would do two cars and race them on the track before the race and see which one to go with. Or stick with straight ahead if you can't race off/ make two cars.
In all normal high performance PWD derby cars they are weighted towards the rear. This places more weight on the rear.
Keeping the rears off the rail is critical. For a normal center strip track this means narrowing the front of the car.
However for your track this means narrowing the rear of the car...
Taking each side in say 1/8" will do it. No more than this...
If you can ditch the dowels or use diffrent dowels I would do so...
If you can drill holes for the dowels I would do so as well instead of using the slots.
I placed the provided wood on the block and drilled holes for the dowels.
Then glued the dowels in and again I mounted it on the block and drilled axle holes.
The Block is the key to any fast car...