Which throttle servo?
09-22-2008, 08:30 AM
#1
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Which throttle servo?
Well, I've had my first Nitro truck (a Revo 3.3) for about 1 gallon of fuel now. So far I've replaced the slipper clutch shoes and now I've apparently burned out the throttle servo. I've read about the too strong of a return spring issue and intend to fix that. The question is: as long as I'm replacing the servo, should I get something different? Should I go for the digital, waterproof Traxxas 2075 or is there something else I should consider?
PS: What else will fail next so I can pick it up while I'm allready at the LHS?! [:@]
Thanks, Eric
PS: What else will fail next so I can pick it up while I'm allready at the LHS?! [:@]
Thanks, Eric
09-22-2008, 02:56 PM
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RE: Which throttle servo?
I am using a Hitec 645 right now. It isn't the quickest but it gets the job done. I would probably get something like the 965 (133oz/.10sec) when it is time.
09-22-2008, 10:41 PM
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RE: Which throttle servo?
+1 on the 94358 Airtronics...will flip my maxx on it's nose [8D]
I would stay away from the digitals for the throttle....really no need since the analogs are cheaper, and this Airtronics is way more than enough power.
You have to make sure you set up your endpoints so that the servo isn't straining at full brake or full throttle, obviously there will be tension with the brake, but set the endpoints right at where the servo stops moving and make sure you have fuel tubing against the brake lever to give the servo a cushion...helps tame the brakes also.
Digitals are more sensitive to being worked hard at their endpoints.
I would stay away from the digitals for the throttle....really no need since the analogs are cheaper, and this Airtronics is way more than enough power.
You have to make sure you set up your endpoints so that the servo isn't straining at full brake or full throttle, obviously there will be tension with the brake, but set the endpoints right at where the servo stops moving and make sure you have fuel tubing against the brake lever to give the servo a cushion...helps tame the brakes also.
Digitals are more sensitive to being worked hard at their endpoints.
09-23-2008, 01:32 AM
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RE: Which throttle servo?
I went through 2 traxxas and one aftermarket throttle servos before i finially decided to throw out that return spring. I must of adjusted the carb angle and made sure the endpoints were set more times than i can count after the first one died. I am sure some of the top end servos will not burn out as fast, but I would ditch that spring asap. I actually got mine from the hardware store, cut and bent it to work. Never had a throttle servo go bad again. Make sure you put a electronic fail safe in since your going to lose your mechanical one. The weaker spring just cant pull the throttle closed if you lose signal.
Just so you know, my last throttle servo I burned out, was a run away at full throttle. Getting rid of the spring was a no brainer. If im going to have a run away with the mechanical strong spring as a fail safe, then why go through the trouble of having that servo killer.
Just so you know, my last throttle servo I burned out, was a run away at full throttle. Getting rid of the spring was a no brainer. If im going to have a run away with the mechanical strong spring as a fail safe, then why go through the trouble of having that servo killer.
09-23-2008, 09:10 AM
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RE: Which throttle servo?
ORIGINAL: Mspeed
I went through 2 traxxas and one aftermarket throttle servos before i finially decided to throw out that return spring. I must of adjusted the carb angle and made sure the endpoints were set more times than i can count after the first one died. I am sure some of the top end servos will not burn out as fast, but I would ditch that spring asap. I actually got mine from the hardware store, cut and bent it to work. Never had a throttle servo go bad again. Make sure you put a electronic fail safe in since your going to lose your mechanical one. The weaker spring just cant pull the throttle closed if you lose signal.
Just so you know, my last throttle servo I burned out, was a run away at full throttle. Getting rid of the spring was a no brainer. If im going to have a run away with the mechanical strong spring as a fail safe, then why go through the trouble of having that servo killer.
I went through 2 traxxas and one aftermarket throttle servos before i finially decided to throw out that return spring. I must of adjusted the carb angle and made sure the endpoints were set more times than i can count after the first one died. I am sure some of the top end servos will not burn out as fast, but I would ditch that spring asap. I actually got mine from the hardware store, cut and bent it to work. Never had a throttle servo go bad again. Make sure you put a electronic fail safe in since your going to lose your mechanical one. The weaker spring just cant pull the throttle closed if you lose signal.
Just so you know, my last throttle servo I burned out, was a run away at full throttle. Getting rid of the spring was a no brainer. If im going to have a run away with the mechanical strong spring as a fail safe, then why go through the trouble of having that servo killer.
09-23-2008, 09:59 AM
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RE: Which throttle servo?
The Tekno throttle linkage is a great upgrade.
http://www.impaktrc.com/product_info...roducts_id=926
I burnt out my first 645 because of the return spring (which Hitec warrantied) . With this setup it is super smooth and, as I am running a failsafe, I am not using a return spring at all.
http://www.impaktrc.com/product_info...roducts_id=926
I burnt out my first 645 because of the return spring (which Hitec warrantied) . With this setup it is super smooth and, as I am running a failsafe, I am not using a return spring at all.
09-23-2008, 07:01 PM
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RE: Which throttle servo?
+1 on the Tekno. I never liked the throttle servo linkage setup on the revo. Too much strain on the carb with the angle it pulls at. If I had to do it all over, I would just go Tekno, but putting that weaker spring in fixed my problem totally. You just need to make sure your carb angle is set right for it to be smooth.
09-24-2008, 12:10 PM
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RE: Which throttle servo?
ORIGINAL: ajb1205
The Tekno throttle linkage is a great upgrade.
http://www.impaktrc.com/product_info...roducts_id=926
I burnt out my first 645 because of the return spring (which Hitec warrantied) . With this setup it is super smooth and, as I am running a failsafe, I am not using a return spring at all.
The Tekno throttle linkage is a great upgrade.
http://www.impaktrc.com/product_info...roducts_id=926
I burnt out my first 645 because of the return spring (which Hitec warrantied) . With this setup it is super smooth and, as I am running a failsafe, I am not using a return spring at all.
09-27-2008, 09:47 AM
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RE: Which throttle servo?
Another thing on return springs, they don't need to snap the throttle shut, just need to overpower the idle servo. If it takes a second or two to close it then at least it closes and saves wear on the servo.
