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Old 01-21-2007, 10:15 AM   #1
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Default Adequate Servo Specs for Steering/Throttle

Looking for servo specs for 1/8 scale buggy/truggy. More often than not RTRs come with weak servos

I have selected 2 below. I'm leaning more towards a buggy.

So let me know if these will work:

Steering
: JR Z650M
Torque: 142 oz/in (@6.0V)
Speed: .17 sec/60 (@6.0V)

Throttle:Bluebird BMS-611MG
Torque At 6.0V: 108 oz-in.
Speed At 6.0V: 0.09 sec / 60
Ball Bearing: Dual

And if these aren't adequate maybe some could suggest minimum strength and response time. I want something reliable that won't won't break the bank. Doesn't have to be the best of the best.

Thanks
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Old 01-21-2007, 10:29 AM   #2
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i would get a better steering servo. Airtronics at least.
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Old 01-21-2007, 11:05 AM   #3
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Okay. Appreciate the reply, but not that helpful. I need to know what specs. I'm sure there is more than one good brand....
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Old 01-21-2007, 11:08 AM   #4
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Steering: JR Z4800T
Torque: 162 oz/in @ 6V
Speed: .16 sec/60 deg @ 6V
Bearing: Dual output
Motor Type: Coreless

Throttle: JR Z4800S
Torque: 102 oz/in @ 6V
Speed: .11 sec/60 deg @ 6V
Bearing: Dual output
Motor Type: Coreless

I have had great luck with JR servos in anything, right now i have a JR z8800s (digital version of the z4800s) in my t4 and i love the thing to death.
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Old 01-21-2007, 11:19 AM   #5
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JR Racing-9000T
300oz of torque

JR Racing-9000S
.10 transit time

Look on amainhobbies for the exact specs but mine are close. No servo's are better other than Hitec Ti gear servos but they have so many that its confusing as to which one to buy.
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Old 01-21-2007, 12:07 PM   #6
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Quote:
Originally Posted by TxCZShooter
I want something reliable that won't won't break the bank. Doesn't have to be the best of the best.
only reason i didn't state the 9000 series servos.....they are around $30-$40 more then the 4800 series.
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Old 01-22-2007, 09:01 AM   #7
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TxCZShooter,

I'm sure you choices would work fine. Many of the manufacturers have say that all their 100 in/oz. + servos are 'ideal' for 1/8th buggies. You've picked some lower cost servos with very reasonable numbers. I ran a Mayhem with a Futaba 9451 steering and JR590 for throttle without any problems.

However, many of the other posters have suggested digital servos which are supposed to have a big advantage over the analog one's and that is holding power. I interpret it similar to the following: torque will let you turn the wheels while your car is landing off a big jump and your car has lots of g-force driving the front wheels into the ground, holding power will keep the wheels in position when you hit the big rut in the track during this turn.

If you're going to race competitively, you might want to consider the jump to some digital servos now instead of upgrading later. I would also recommend 175 in/oz + of torque for steering if this is the case. If you're mostly bashing or casually club racing, your choices will probably be fine. You have the right idea looking for specs rather than brand. Most people ruin a servo or two because of their own errors and write off the brand telling everyone it's junk.

BTW, I'm putting together all the pieces for a RC8 when it's released and I'll be running a ACE 1015 (200 @ .108) for steering and a Futaba 9451 (120 @ .10) for throttle. It's about a $90 and $80 combo.

Shane
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Old 01-22-2007, 10:43 AM   #8
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Good price on a 200oz servo. Thanks for the info, that's pretty much what I was thinking. Besides those servos could always go to another vehicle if I decide to upgrade.

Thanks,
Tx
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