For the record you can mount the neu castle 1717 in the gtp2e or dirt oval by just grinding the motor mounts to accommodate the 4mm screw to mount the motor.
Castle told me to forget it . That it would never get past 30 mph . We'll see.
Beer can sized motor installed. 1717 - 1580 kv motor
25 tooth spur while i wait for a 30 tooth from tekno.