Revo Upgrade

i'm a basher thinking of upgrading my 6s lipo tekno conversion revo to 10s lipo. Question is, approx how fast do you think it could reach with basicly everything stock? 15T clutch bell, 38T spur, wheels/tyres, suspension etc.
Right now i have the MGM Compro 160 amp, 18 cell ESC running 6s Flightpower 2500mahs.
I'm thinking of going MGM 12032 ESC and two Thunder Power "eXtreme V2" 5S 3850mah. So what speeds do u think i'm looking at with this new setup?

Thanks...