Bob Barry

iTrader: (22)

everyone says that. People need to realize super fast servos just makes your car twitchy and USUALLY means you give up torque. Torque = steering. If you have a servo that pulls .06 but under load it struggles, you're gonna push. Especially on sweepers and high speed turns. Not to mention I have yet to find someone who can tell the difference. If I gave you my car and didn't tell you, you wouldn't know.

btw, I didn't just pick those numbers out of the air randomly. I noticed that both Cav and Maifield ran the same servos in every car. So I looked into it and found out why.

Cav ran the 94671 for years when he was running Airtronics. Check out the specs. Look familiar? I mean if it's good enough for the 4 time world champ I think it's good enough for me
Torque:
@6.0v: 208.0oz-in
@7.4v: 351.0oz-in
Speed:
@6.0v: 0.13sec/60º
@7.4v: 0.11sec/60º

btw, anyone who followed Kinwald's career would also know he used Helicopter servos forever. For the same reason. 200+oz torque for 10th scale with .10-.15 speeds.

racer1812

iTrader: (31)

I get what you're saying Bob. And I'm not saying I want or like a servo with crazy speed. I don't need .06 speed in anything. Ya I could get used to .13. But I've gotten used to, and prefer .08-.10 in my 1/10 stuff.

Some will ask (not you Bob) "Can you actually feel the difference?" With enough wheel time running various servos..Yes, yes I can. And so can many others on here.

Bob, if that servo was .10@6v and say [email protected] with the same torque numbers it would be my perfect servo.

(not that I need it faster than .10 on 7.4v, that's just what happens when you up the voltage)

Cain

iTrader: (294)

if the darn servo would fit I am really loving the S9372sv

Specs:

Torque: 280 oz/in (20.1kg) @ 6V
Speed: 0.07 sec/60° @ 6V

Torque @ 7.4V: 24.6 kg (342 oz/in)
Speed @ 7.4V: 0.06 sec/60°

dex410v5 though has limited space so if you go with that vehicle, keep in mind it may not fit right without some mods.

Bob Barry

iTrader: (22)

rock on!

I just hate when guys feel that they have to spend more or sacrifice torque for a blazing fast .06 servo LOL.

racer1812

iTrader: (31)

I do like at least 200oz. even in 2wd buggy though. That way I don't have to worry about burning it up "walking" my car off the pipes in practice

lyons238

iTrader: (15)

a fast servo does not feel twitchy. the servo speed is the response time from when you give it signal to when it moves. a fast servo feels connected. you can adjust the servo speed with the rate on your radio. i like as fast of a response time as possible to feel most connected...

Cain

iTrader: (294)

when my servo feels "twitchy" its usually the exp rate relative to how far I am turning the wheel and what I feel comfortable with to me at least. I usually run about -10 (futaba 4PLS) or so expo.

carpetburner

iTrader: (8)

would this servo work good in 1/8 scale http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXFTMB ?? Just wondering if its too slow for steering....

Zerodefect

The 7940. Because it's been out for years and has it's bugs worked out. Although the new brushless servos have good reviews.

If you can trade a little speed for even more durability, the 7955 and 7950 are the way to go.

Zerodefect

Yeah, that's not really a race car servo. And for that money you can get a 7940 or 7950.



The pros use weird servos with weird specs because they could care less about the specs. Experienced racers use what works and feels best. Speed and torque specs are mostly BS that tells us very little about how well they'll actually work in the car.

Some servos (KO) even run like complete broken turds in the car on the pit table, but function perfectly fine on the track. My KO RSX has little seizures when the car is off of it's wheels.

I still swear by 7955's on 8.4 volts. But they're too slow on 6.0v.

Kalio

Amain's brand Protek seems to have some pretty stellar servos, at least on paper. This one in particular sounds good though a bit pricey:

RC 130SS

0.06 transit speed, and 211 oz-in of torque @ 6.0V
0.05 transit speed, and 260 oz-in of torque @ 7.4V

Bob Barry

iTrader: (22)

it would work but be too slow. Try to shoot for between .10 and .15 for speeds IMO

lyons238

iTrader: (15)

That has nothing to do with anything, really. A servo that makes some noise or twitches around on that pit table is usually interference from having your radio too close to the servo or other factors. You're literally just talking out of your a**

Furthermore, you say the specs for servos are bullsh*t. For some sh*tty brands this is true. But for a lot of good brands this is not true. This has a lot to do with test environment and equipment, but theres been many tests where certain high quality servos put out either above their stated specs or within a very reasonable degree of their states specs.

I do agree about your statement in which it's whatever feels best and performs best to you though.

Thanks man, I'll check those out, any other opinions on these versus the Hitec 7940?

racer1812

iTrader: (31)

lyons, it sounds like you're confusing servo speed with latency.

lyons238

iTrader: (15)

I edited it, I misread what was said I apologize.