I would have to say the Picco JL red dot off road. I believe you are going to put this in a crt.5 and have seen them run and they Fly
You can also run the Picco JL tuned. this is a on-road motor but i dont see any harm being both the os and rb are on-road motors
And also for the price you can not go wrong.
Here is a link its the second motor this is the off road one
http://www.nitrohouse.com/engines_pipes.htm
And here is a link for the tuned one
http://www.kamikazercracing.com/prod...?prod=51128-3T