Thank you both for the input on motors! Nice to know the X11 can handle 5.5
. The X20 also have the timing issue making it faster than a regular 6.5. I think I will settle for a 7.5.
Just to let you know my last race car was a Yokomo 870C... I have been driving some modern stuff in the later years but only for fun. I'm actually fiddeling aruond with vintage rc, and don't have the thorough hands on knowledge with all the modern stuff. If you want to have a look at what I've been doing lately see this thread:
http://www.rc10talk.com/viewtopic.php?f=33&t=27601