Warp Speed!

Originally Posted by RC-NUT

Thanks guys. I would not have guessed a short course motor. I figured that motor would be a high torque low rpm set-up.

I will start looking around at prices.

I think your mind set is on internal combustion engines. Brushless motors speed is determined by it's kv and voltage that it is being fed. Maybe some motors might be a bit slower to spool up but they should theoretically still reach their kv X Voltage speed. (unless the motor is way under powered or battery voltage drops under load) At least that is my understanding of it. Happy to be corrected though.

IMO if you are just going to do a single speed run/pass and then let the car cool down then you should be able to go with 4S. I thought that the Castle 14xx series was rated for 100,000rpm. Isn't it? If you do go that way then you really want to make sure your batts and ESC are up to the task. All depends how fast you want to go. The faster you want to go the more you will be risking.

[BrianG]

Originally Posted by BIG-block

...Brushless motors speed is determined by it's kv and voltage that it is being fed. Maybe some motors might be a bit slower to spool up but they should theoretically still reach their kv X Voltage speed. (unless the motor is way under powered or battery voltage drops under load) At least that is my understanding of it. Happy to be corrected though...

Actually, higher timing can increase motor rpm to beyond the kv*voltage calculation. How much extra speed vs how much timing vs wasted heat takes some experimenting though.

[ANGRY-ALIEN]

If you want get to a 100mph quickly... you can try a 7700kv motor on 4S... the vid below demonstrates this with a TC4... I drive a touring car on 2s with a 7900kv motor and it is quick...
you will need to watch the temps though...

[YOUTUBE]G7CYGViimAQ&feature[/YOUTUBE]

http://www.youtube.com/watch?v=G7CYG..._order&list=UL

Alien