Does anybody know how much torque is sufficient for the steering servo on a 1/8th scale ic car?

KO's high speed servo's have 8kg/111oz but they also produce higher torque servos..

Thanks!

Everyone has their own opinions. I've had guys tell me that they've had good luck with 120oz of torque for steering on a buggy. Personally, I'd rather have at least 150oz. I'm currently running an Associated XP (Ace) 1015 which has around 200oz.

150oz is a good base line.

Agreed. What was said about preferance is very true also. To give you an idea of that, i recently read Mike Truhe's 8ight setup at worlds and he was using an airtronics steering servo with 120oz oz in of torque and .06 sec for speed.

Not what most would guess for specs

Good point. I came across and "oddball" Airtronics servo (94360 I think) in my box o' servos. I did some research to get some specs on it and it turns out it's the same servo that Drake (and probably Truhe) uses for both throttle and steering; same specs; 120oz/.06sec. It's actually a very popular 1/8 on-road servo.

Anything over 100oz. tq is enough for today's 1/8 buggies.

Truggies; I'd shoot for 150+, with closer to 200 preferred.

Speed boils down to a personal preference. Generally anything under a .15 is "fast enough".

I'm mostly concerned with 1/8 on road actually, but thanks for your responses, they've been helpful!

I hope these links help:

http://www.amainhobbies.com/product_...5d471314bd4f51

http://www.amainhobbies.com/product_...ducts_id/19298

I have heard quite a many 8th scale on-road racer use those above mentioned servos for not only steering but for throttle and brakes as well.

I just love the machos who instantly grab for the biggest,brightest and most expensive. Overkill is achieved by many all to often. Tone it down a bit. Back to the servo talk No you do not need 400oz inches but that is up to you

I am running a futaba s9351 servo in my mrx4x.I just started onroad last year and the servo is still working perfectly.I crashed the car left and right a million times and it still centers perfectly.Very tough servo and in hrs mode is awesome.I am using the s9551 servo for the throttle and brakes.It is low profile so I can stuff all my wires neatly under there.The s9551 buzzes alot trying to keep itself centered against the tension of the spring.I am running this off of a Team Orion Marathon 1600MAh 6 volt reciever pack and it last all day long no problem.Servo cost about 120 for the s9351 and the reciever pack 25.

s9351 specs:
Speed: 0.16 sec/60° @ 4.8V
0.13 sec/60° @ 6V
Torque: 153 oz-in @ 4.8V
192 oz-in @ 6V

s9551 SPECS:
Speed: 0.14 sec/60° @ 4.8V
0.11 sec/60° @ 6.0V
Torque: 98 oz-in (7.0kg/cm) @ 4.8V
122 oz-in (8.8 kg-cm) @ 6.0V

Back before everyone started coming out with high and higher torque servos the standard was Airtronics 94358 for steering and 94357 for throttle.(at least at the tracks I ran at. More torque is not a bad thing personally for 1/8th scale 200 works great.In a truggy I would look for more.