Looking at all nitro cars you will find servos around 8Kg of torque and depending the personal prefs, quicker or slower, but all around 0.12 sec/60º.
For many years I only used Futaba servos 9450, 9451 for the steering and 9304 & 9550 for the throttle (this last is a little lighter, so you can shave some precious grams on your car if you're a weight freak).
Some of my 9450 units have a little more than 5 years old and they work like the first day. Only one needed repair a and sits on the toolbox as backup.
Regarding of being cheap on the servos I think is a no-no, invest on good electronics (don't know your JR Servos, but on the past, never liked JR/Graupner electronics).
[quote=MugenDrew;2684554]BATTERIES are for FLASH LIGHTS, gasoline is for cleanin parts, alcohol is for me to drink and well NITRO...everybody know thats for racing.[/quote] :D:D:D