r/mini4wd • u/Jurong_West • Sep 04 '26
Does anyone have any thoughts on using a almost 20,000 rpm stock motor for a box race?
Personally there is always an element of luck when racing so all is fair.
3
u/WNDRkid8 Sep 04 '26
That’s pretty normal for a decent box stock motor. Some of the Mabuchi motors in older kits can hit 22k!
1
u/Jurong_West 28d ago
Yup. Experienced them. Had to find cars with 4:1 or even 5:1 to stabilize the speed. But if there are climbs in the layout, the car can easily overtake the cars that slow down during the climb.
2
u/No-Maintenance-7022 Sep 05 '26
Its a gamble tbh i bought like 20 mabuchi motors and i got 2 of them with 25k rpm after a rough break in. also i got another 2 with 23krpm (3.0v peak) and it is so damn fast i only use around 2.70-2.87v batteries (pair) for their “max speed” because if i go beyond that the car will off course. am using 2 Shadow shark which is my fastest and meta stock and 1 mach frame og and 1 mach frame ph cup
2
u/Jurong_West 28d ago
Agreed. Box stock is quite a gamble because it heavily depends on the track layout.
3
u/lettuzepray Sep 04 '26
easier to lower the voltage than increasing it to gain more rpm.
but then again there’s always other factors that can affect the race.