by MikieG » Sat Sep 21, 2019 7:37 am
The track is Carerra 6x16 with 43 foot of track. "Twitchy"? Not a chance. You can pin the trigger and hold it there and NEVER leave the track. This is the perfect car for little kids!!!
My intent was to gear the car for mass acceleration because we only have four 13 feet straight aways.
One more thing. I also changed the rear wheels to F1 type as the tire is now much wider and stickier. However, there is a noticeable o.d. difference. Factory Carerra axle assembly tire o.d. is .870. New axle assembly is .8.
So as an experiment, I ran the car with the factory axle assembly as well. Keep in mind, factory ring gear is 26t. So with the new Shark motor having 8t pinion this experiment had a gearing of 8/28. We also gained .070 tire diameter. Car performed the same.
I have NSR cars with this same motor. They scream! They are also lighter cars.
The motor is new. I ran it at 4 volts for 15 minutes. Then I chopped off the opposite end output shaft and pressed on the pinion (using the proper tool). Lastly, I soldered on the Carerra wiring harness. Motor would not run. At all. I disassembled the can everything looked fine. After reassembly, it worked. But not like I would have thought it should.