2.5T 13800KV w/RX8 in my CRT.5 startup test vid
 

2.5T 13800KV w/RX8 in my CRT.5 startup test vid. Only used 3s A123 and soldered up 4 caps of 1000uF 35V for Mrs. Ripple. Don't mind the wiring for now as I finished it at 1.30 AM. Used 6mm motor plugs, so I should be good once I have some time to actually do a full run. 12T is the smallest pinion I have and I believe 11T would the be smallest I can use for a nice gear mesh. As you can see, I don't use no stinkin' sensor cable and still get that high kv motor started smoothly. But that might actually chance when I gun the trigger :whistle:

This setup is actually made to proof to some fellow dragracers that a 2.5T motor can be used with the RX8. As I sold both my dragsters, I opted to use the CRT.5 just to proof how robust this esc really is.

http://www.youtube.com/watch?v=oGkugqHVWVE

http://i189.photobucket.com/albums/z...n/DSCF7328.jpg
http://i189.photobucket.com/albums/z...n/DSCF7328.jpg
http://i189.photobucket.com/albums/z...5/DSCF7332.jpg
http://i189.photobucket.com/albums/z...5/DSCF7331.jpg

Are you using a sensor wire? At :30 secs, I see a momentary backup before going foreward. I thought the sensor was supposed to stop that

That was sensorless.

gotta see the full vid! acually high kv runs better unsensored then say a 13.5 or 17.5, i ran a lrp 6.5 on an ezrun 60a speedo in my xxx4 and it was smooth as butter

I'll get a vid soon. Working long hours takes away from my daytime fun.

From running it last nite, I noticed a big difference between the power hungry B50 hacker and the orion 2.5T motor. The 2.5T builds speed up gradually whereas the Hacker wrecked havoc on the drivetrain from the torque. Temps were all below 130F after the pack dumped.

Here's the vid with the 2.5T running

http://www.youtube.com/watch?v=a9J8Fc8Ed1A

i would go 3s2p if i were you. a motor with kv that high must draw some serious amps. i think your torque and top speed would improve greatly. 2s2p would problably even help performance.