CEN Matrix Brushless - Questions

[Shark413]

Hi, I happen to have a CEN Matrix TR roller which is a back-up to my nitro CEN TR truggy. But since I have it and it is just sitting there, I figured why not convert it to brushless. I have a Mamba Max ESC but I am not sure what motor to get. I would like to keep the cost down so I was looking at one of the Feigao XL motors (7,8,9XL). Which one would give me performance close to my Nitro truggy (on the race track)? and what lipo (2s, 4s, ?) should I run with the ESC/motor combo? Gearing suggestions? I am kind of a newbie regarding brushless technology so your suggestions will be appreciated.