Grom Grom Top speed info thread

[adamwins]

Looks great- can’t wait to see it

I’ve been having a bit of fun with mine. Trying to get it to go 50mph+ has been my personal goal. No idea what top speed anyone else has reached except for the member here who has the YouTube video and reached 42 mph which I thought was pretty cool. I’ve yet to hit 50mph. My top speed is 49.7 mph and 49 again today before I smashed into a curb and broke both towers, suspension and deformed a battery, etc. I bought a new chassis new differentials and will be rebuilding this week with some minor mods. This is/was the current setup

Castle 1007-6350 sensored motor w/
10 amp BEC
Mamba micro x2 esc
18t pinion
Toyo tires
4200mAh 120c (3s battery)
Metal suspension and steering
spektrum SLR300 receiver & SLT3 transmitter

What I’ve tried and tossed:
Motors:

Quicrun 2435-4500kv
Hobby park 2435-4800kv
Castle 0808-4100kv
Castle 2852-3100kv
Castle 1010-5600kv

View attachment 352596

View attachment 352597

View attachment 352598Finally

 

[TN-RC]

What do you plan on making them out of? Pinion selections on mod 0.5 ain’t too bad. With the drill press it only takes me a minute to drill one out.

PETG CF.

 

[fredw90]

PETG CF.

I don’t think those will hold up if you plan on printing them. The teeth will wear quickly or the driveshaft hole will round out.

 

[TN-RC]

I don’t think those will hold up if you plan on printing them. The teeth will wear quickly or the driveshaft hole will round out.

I have had good luck with 32p 3d printed gears.

 

[adamwins]

anyone take their grom out recently?