Is there a rule of thumb for working out motor amp draw

[Arct1k]

A rough guide:

Motor is X amps
Batteries should be X * 1.25 amps
ESC should be X * 1.5 amps

Best thing to do is post your setup and guys wih equivalent setups can help guide your selections / provide eagletree results from comparative setups.

Rgds

[pinkpanda3310]

Set up is-
e-maxx 3905
mmmv3
medusa 36-80-1600
neuenergy 4300 25c 6s
Integy 40 series sq pattern

Gearing is subject to change if im out front of my house then it bearly does 30mph on 4s (and bearly warms up) but I like to bash it in sand and occasionally do hill climbs and I prefer a bit more speed, 23/58 is the tallest gearing i have but am reluctant to use that anywhere but on the flat. I probably have a bit up my sleive but don't want to push it in the hot dry dirt of oz.

Thanks for your reply Arkt1c, I'll have to start jotting down points like that to make up a bible for myself.

[lincpimp]

As Arct1k said.

Please give us some info about your setup. You will also have to factor in that some batt mfgs overrate their packs, and a few other variables.

I can usually guess the necessary pack by the vehicle setup and tire size. Something like a monster truck with 6" tal tires and a properly sized motor that will turn around 35k rpm geared for 40-45mph will need around 2200 watts worth of battery power.