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-   -   Savox Servos (https://www.rctech.net/forum/radio-electronics/451966-savox-servos.html)

ByteStream 12-13-2010 08:36 AM

Quick Question ..

I am looking at picking up the 1257 or 1258, for use in a Touring Car - 17.5 Spectrum Radio, which servo would you recommend, they are pretty close in specs.

Also, running a 2s Lipo, would I need a power cap? I run the Futaba 9551 currently without any issues.

niznai 12-13-2010 08:48 AM


Originally Posted by builtb16a (Post 8290577)
long story short.. capacitors store energy.

Nope. They store charge.


Originally Posted by builtb16a (Post 8290577)
when amperage is drawn from a source (battery) in huge amounts, (hungry servo's) the voltage or potential decreases, and could shut down the receiver, giving it finicky performance, or delayed response.

if your into car audio, and bass systems, and huge stereo setups, cap's, batt. caps.. are very common due to the amp draw from large amplifiers drawing current for its equipment. capacitors store the extra vars needed to support the watts needed to move the current.

Nope. They just act as a temprary source of voltage to smooth out the bumps that would otherwise occur in the power supply (which would distort the output).

Rufus2010 12-13-2010 01:36 PM

B-Stream,
I would go with the slightly faster 1257. I don't think that you would benefit from the extra torque as much as the extra speed. An offroad truck trying to hold a line in a bumpy corner would benefit from the extra torque, not you. (IMO)

bjholz 12-13-2010 02:49 PM

Pff i have a 1257 in my B44 and its plenty of torque lol. Blazing fast too, i had to tune it down a lil ha

td-civ 12-13-2010 06:07 PM


Originally Posted by ByteStream (Post 8336632)
Quick Question ..

I am looking at picking up the 1257 or 1258, for use in a Touring Car - 17.5 Spectrum Radio, which servo would you recommend, they are pretty close in specs.

Also, running a 2s Lipo, would I need a power cap? I run the Futaba 9551 currently without any issues.

your more then fine with the 1257 i run the same servo in my tc car and ntc car you dont need the tq in your onroad cars



Originally Posted by XXX8ight (Post 8305888)
has anyone tried to run 7.4v on the 1256 and 1258s?

do not do it you will burn them out

td-civ 12-13-2010 06:15 PM


Originally Posted by J Blaze (Post 8265161)
I guess a 1258 dont work with spectrum raido.
thats what they told me after returning the second one!:flaming:
would have been nice to know that before i tried the second one.
said the recever dont put out enuff amps sorry.
stickers are cool.

it dose work i have never had anything go wrong with the 4 i had
you have to run a cap in your esc i run 2 and if your running more then 2s you will need a ubec to power your rx and servos as the ecs can not stay at 6.6 volts and jumps because of the bigger lipo

Rufus2010 12-13-2010 06:39 PM

My 1258 doesn't work with my Spectrum receiver unless I connect a capacitor (cap) into an empty slot on the rx. Then it works fine. The cap smooths out the power drain that the servo requires. Spectrum sells them for 5 or 6 $.

td-civ,
What do you mean by an esc cap? Are we talking about the same thing or is your capacitor wired into the esc? Are you running 2 on one esc/rx? If so, how do you connect them?

td-civ 12-13-2010 06:47 PM


Originally Posted by Rufus2010 (Post 8339201)
My 1258 doesn't work with my Spectrum receiver unless I connect a capacitor (cap) into an empty slot on the rx. Then it works fine. The cap smooths out the power drain that the servo requires.

td-civ,
What do you mean by an esc cap? Are we talking about the same thing or is your capacitor wired into the esc? Are you running 2 on one esc/rx? If so, how do you connect them?

i run 2 caps on the esc
but if your running more the 2s lipo you need a ubec to power your rx less drain then pluging in a cap in your rx

Rufus2010 12-13-2010 09:03 PM

td-civ,
I still don't understand what an esc cap is. I know that many, if not all esc's, come with capacitors as part of their design. Are you wiring in extra capacitors directly to the esc? How is that done? Are you talking about the capacitors that you plug into the rx, which is what I am familiar with. How do you plug two in? Is there an extra wiring harness you need to buy? Why do you use two, or what is your set up that requires two caps?

td-civ 12-13-2010 09:17 PM


Originally Posted by Rufus2010 (Post 8339953)
td-civ,
I still don't understand what an esc cap is. I know that many, if not all esc's, come with capacitors as part of their design. Are you wiring in extra capacitors directly to the esc? How is that done? Are you talking about the capacitors that you plug into the rx, which is what I am familiar with. How do you plug two in? Is there an extra wiring harness you need to buy? Why do you use two, or what is your set up that requires two caps?

its for the rx

if you know how car audio works it works the same way its so when you go full tilt the battery will dorp abit and what happen is the rx will power out because the power is all going to the motor this way with the cap it wont drop and the rx wont power

8ight-racer 12-13-2010 10:57 PM

When people are talking about caps for the receiver, they have electric cars. Does this still apply to nitro? I raced a car a few months ago that had Savox servos in them, and I simply installed my Spektrum DX3S radio and receiver, and I didn't have any problems. So I bought the 56 and 58, but don't want to have this problem with my DX3R now. Should I be fine, or still install the cap?

td-civ 12-13-2010 11:59 PM


Originally Posted by 8ight-racer (Post 8340330)
When people are talking about caps for the receiver, they have electric cars. Does this still apply to nitro? I raced a car a few months ago that had Savox servos in them, and I simply installed my Spektrum DX3S radio and receiver, and I didn't have any problems. So I bought the 56 and 58, but don't want to have this problem with my DX3R now. Should I be fine, or still install the cap?

you dont have to on nitro only electric
the 65 and 58 are 6 volt servo's if your goin to run a rx lipo pack you will need to run a ubec to step it down to 6 volts

rendcool 12-14-2010 09:02 AM

which savox servo is the best for touring car ?

I got TC6 and DX3R ...

any recommendation would be really appreciated ..

td-civ 12-14-2010 09:40 AM


Originally Posted by rendcool (Post 8341740)
which savox servo is the best for touring car ?

I got TC6 and DX3R ...

any recommendation would be really appreciated ..

sc-1257tg and if you want low profile sc-1251mg

rendcool 12-14-2010 10:29 AM


Originally Posted by td-civ (Post 8341881)
sc-1257tg and if you want low profile sc-1251mg

what are the differences between those two ?

and what is low profile ?

which one better?


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