What kind of setup Bl revo

[remie]

a little update here.
I've bought a second hand revo ( have top pick it up though).
Now I will have to wait for someone to buy my plane before I can buy the rest of the stuff.

but here's my setup so far:
- diff with a 51t plastic spur
- dogbones from mike/rc-monster
- what motor pinion (mod1 pinion?)?
- what motor, ...xl?
- I want to use a 9920 esc
- I'll be using 14 cells

so I still need some advice on the motor and the motor pinion.
what will be the difference between the 8xl and the 9xl?