myk505

at dirtyrc.com you can find this speed calculator for your rc car. all you have to do is download the program, then follow the instructions from dirtyrc.com (tips and how to section).

Nrctc3

iTrader: (2)

I dont need to know they speed, as long as it puts everyone else behind me... It's fast enough!!!

myk505

true, very true! i just thought that this tool could be useful, the only way i could test speed before was to run my car naext to a real car, though this is not 100% accurate. also know i can find out how much faster a modified would make me go.

vassago

Without seeing the program I assume it just takes the circumference off you tires multiplied by (motor RPMs / internal ratio)

But how do you know how many RPM's your motor will make? This will depend on the track, tires, body, wind et. etc.

myk505

i suppose when you get your motor some have a dyno readout with rpm on it also some websites have approx rpm for motors. yes that is how it works

John_S

i think the venom speed meter may do a beter job at this task

vassago

The RPM's stated by websites, on the motor or on the dyno will never be the RPMs the motor reaches since the loads are different.