difference of a robot servo
 

is it really different from a regular servo? can they be ran in rc cars?

i'm asking because i just won a jr sr8801 on ebay bnib for $33.50 after shipping.

specs
Type:Digital Ultra-Torque
Torque:395.8 oz/in
Speed:0.14s/60deg
Dimensions (WxLxH):.83 x 1.59 x 1.41
Weight:2.3 oz
Voltage:7.4 (data)

robot servos are made for 7.4V who knows how they would perform on standard 5/6 V in cars also they have bigger operational angle (of course EPA solves this)

also the might have some gears nylon and in big truck you should aim for all (really all) metal gears