I have a 4000kv outrunner motor in my upgraded vector sr48, haven't had any issues. Was going to use a bigger motor, probably 540 size in the traxxas so I guess I should go a bit smaller kv, I'll look for a 3500kv or slightly less. Thanks for the info.
I'm helping a friend upgrade an older traaxas blast. It has a titan 12t and 7.2v nimh battery. Going to upgrade to 3800kv brushless motor and 60amp water cooled esc, metal prop and 3s lipo. Think we need to upgrade to the driveshaft to 4mm. Can anyone reccomend a shaft and sleeve and coupler...