Here are three armatures I wound for drag racing. The one on the left is an unlimited wind. The other two are 5 ohm winds for another racing class.
The armature from our M10 Can Motor. It was custom wound for a customer at 2.4 ohm. It is pictured on our balancer.
The mag inserts are custom milled in our shop. The photo shows on the left a RRR wheel, Pro Track wheel and the next two are our inserts. They pressed into our wheels.