Originally Posted by
Bob Corey
I'm on the stock right now: ebay.com/itm/HPI-1-10-Jumpshot-MT-SF-10W-HIGH-TORQUE-WATERPROOF-SERVO-Steering-Throttle/371498428709?hash=item567f082925:g:9pIAAOSwO7haAcp H
I must say that I don't quite understand the specs and what the numbers mean except from the dimentions and delay time.
So, the stock servo is called High Torque, but it has about 1/2 the torque of the Savox 1251 ...... I can see why you have a problem.( Savox 1251 is kind of a standard go to servo for 1/10 scale on and off road ). Look for a servo, with similar dimensions to your stock servo so it will fit in your car. Look for a torque number around 7-9 kg.
4.8V or 6V is typically set by your ESC program. Setting is dependent on what voltage your receiver can handle, so if you have a manual, check there. Most radios and servos for the past 10 - 15 years have been able to run at 6V and you would see improved speed and power from your servos.
The HobbyKing servos would be OK, at least you know they are a copy of name brand servos. I've heard the Power HD is OK too.