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Old 10-25-2006, 04:22 AM   #1
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Default Servo question

I just picked up my GT2 and have a few servo questions. Would a JRDS821 be good for a throttle servo? It has 88oz torque, .15 transit @6.0 volts. i currently have two z4750 on my GT which I plan to use those for my steering on both trucks and the JRDS821's for throttle.
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Old 10-25-2006, 08:24 AM   #2
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That sounds about perfect for a throttle servo. Most pro's use Aritronics 737 servos for gas truck throttle at .15 sec and around 70oz of torque. The little slower reaction on the throttle helps keep the motor controlable. Super fast servo's do nothing for gas trucks as the engine has a hard time reacting to very quick inputs. Also if the break is setup right you do not need a lot of power to lock up the breaks on a 2wd car.
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Old 10-25-2006, 08:34 AM   #3
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sounds pretty fair to use that servo for your throttle. Some people like speed and torque for bigger vehicles to help apply brakes and open the carb faster but for gas truck you should be fine. I run a Jr 590 or Jr 4800 series for my throttle. Sounds pretty similar.

Good luck
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Old 10-25-2006, 09:08 AM   #4
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8th scale and truggy are a whole different ball game but for a gas truck this will be perfect.
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Old 10-26-2006, 06:39 PM   #5
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how much power/speed do you need for gas buggie throttle?
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Old 10-26-2006, 06:51 PM   #6
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Thanks guys for the help. I'll pick up two new servos tomorrow then get started on the GT2 assembly.
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