Servo Hopups and other such electrickery?

[VONDUTCH]

Might just be asking some really obvious stuff here but what the heck I'll give it a go-Can I speed up my steering servo(a Futaba S3003) with some clever wiring from my fairly basic ESC (an Mtroniks Msonik3i sport RV).If so,how? Clear instructions would be good or perhaps a link? If not, any ideas on a good, cheap, fast yet strong servo to use? In my current setup is the servo seeing 4.8v or 6.0v? Got a Hitec digital HS-5645MG but its listed speed is apparently no faster than my Futaba-at 4.8v they both rate at .23 sec and at 6.0v the Hitec is actually marginally slower.The Hitec is in my I.C. Hyper 7 buggy and I'm sure the hike in torque is a help but what do you guys think???? My 10th electric is a 2wd Losi xxx. Newbies need the most help I guess