http://www.svmcrono.com/ thats the best I can do for you on the specs. I talked to Eric about the 5 around a week ago and he told me it's a p5 with a better rod and more detail in the build thats all. I'm not sure what you are looking for as far as power goes but if you call GB direct you can get some straight answers. http://home.earthlink.net/~gbdirect/ thats the link for GB. As far as how the motor acts on a track I've only driven a buggy with a rs5 once and it was real smooth. It seemed to need some room to stretch its legs though and the track I was on didn't have enough straight to do that, but the lowend was very smooth.