Throttle return spring
09-05-2008, 11:34 PM
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RE: Throttle return spring
The spring is the first thing I threw away. I never drove my truck with that spring on for a few reasons; First, It didn't look like the carb could open all the way with the spring on. It sure did with the spring off! Second, it puts extra strain on the somewhat weak (stock) servo. It's trying to open full throttle but the spring wouldn't allow it. And third, and most important, you get faster throttle response without it.
Reasons for keeping it on? The only thing I can think of is if your linkage comes apart then there is a possibility of a runaway with out the spring . But, the chances of that are unlikely.
Personally, the reasons for not having it is far greater then having it. So I turfed mine.
I never had a runaway. I've always made sure the batteries in the receiver and radio are always charged to minimize the chances. I use to use the truck a fair bit. Now, not nearly as much (new baby). So I broke down and bought a failsafe. That way, when I blow the dust off it and take it for a burn, I'm protected against low batteries.
But I'll never put that spring back on.
The TRS does not have enough strength to close the carb if battery juice in your receiver is severed yet the linkage is attached to the servo. Try it. Turn your power off on your receiver at WOT and you will be lucky if it closes a quarter of the way.
If your battery power in your receiver becomes dangerously low, your servos become sluggish and slow to respond. If that happens (without a TRS) and you brake at WOT, it may take a full second or two before your carb closes and another second or two before the brakes start to slow down the truck! In racing, that means you missed the breaking zone after that long straightaway by about a mile and your truck jumped the banked corner and sailed clean into the 3rd row seating of the bleachers and RPMs are JUST starting to die down! That is why you need a TRS in racing! It helps close the carb in a timely manner. Same scenario WITH a TRS and you may have only over shot the corner and missed the apex and possibly drop back a position or two because some one passed you on the inside and was quicker on the throttle out of the corner! But I digress.
A TRS is to help assist the servo and return the carb to a closed position in a timely maner. In the UNLIKELY event that your linkage disconnects from the servo, the return spring will close the carb. Yes. However that is not what it is designed to do.
I think that spring can be put to better use. Keep it as a spare for your favorite pen!
Reasons for keeping it on? The only thing I can think of is if your linkage comes apart then there is a possibility of a runaway with out the spring . But, the chances of that are unlikely.
Personally, the reasons for not having it is far greater then having it. So I turfed mine.
I never had a runaway. I've always made sure the batteries in the receiver and radio are always charged to minimize the chances. I use to use the truck a fair bit. Now, not nearly as much (new baby). So I broke down and bought a failsafe. That way, when I blow the dust off it and take it for a burn, I'm protected against low batteries.
But I'll never put that spring back on.
The TRS does not have enough strength to close the carb if battery juice in your receiver is severed yet the linkage is attached to the servo. Try it. Turn your power off on your receiver at WOT and you will be lucky if it closes a quarter of the way.
If your battery power in your receiver becomes dangerously low, your servos become sluggish and slow to respond. If that happens (without a TRS) and you brake at WOT, it may take a full second or two before your carb closes and another second or two before the brakes start to slow down the truck! In racing, that means you missed the breaking zone after that long straightaway by about a mile and your truck jumped the banked corner and sailed clean into the 3rd row seating of the bleachers and RPMs are JUST starting to die down! That is why you need a TRS in racing! It helps close the carb in a timely manner. Same scenario WITH a TRS and you may have only over shot the corner and missed the apex and possibly drop back a position or two because some one passed you on the inside and was quicker on the throttle out of the corner! But I digress.
A TRS is to help assist the servo and return the carb to a closed position in a timely maner. In the UNLIKELY event that your linkage disconnects from the servo, the return spring will close the carb. Yes. However that is not what it is designed to do.
I think that spring can be put to better use. Keep it as a spare for your favorite pen!
09-06-2008, 01:02 AM
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RE: Throttle return spring
ORIGINAL: Stablock
Reasons for keeping it on? The only thing I can think of is if your linkage comes apart then there is a possibility of a runaway with out the spring . But, the chances of that are unlikely.
Reasons for keeping it on? The only thing I can think of is if your linkage comes apart then there is a possibility of a runaway with out the spring . But, the chances of that are unlikely.
My brakes can stop my truck at WOT, so all is good
09-07-2008, 10:48 AM
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RE: Throttle return spring
ORIGINAL: ThunderbirdJunkie
And the typical scenario for THAT would be that the ball end comes off the carb pull....which means you still have brakes.
My brakes can stop my truck at WOT, so all is good
ORIGINAL: Stablock
Reasons for keeping it on? The only thing I can think of is if your linkage comes apart then there is a possibility of a runaway with out the spring . But, the chances of that are unlikely.
Reasons for keeping it on? The only thing I can think of is if your linkage comes apart then there is a possibility of a runaway with out the spring . But, the chances of that are unlikely.
My brakes can stop my truck at WOT, so all is good
09-07-2008, 10:51 AM
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RE: Throttle return spring
Gonna make some improvements to my throttle/brake this week..... just ordered enough stuff to do 2 ofna throttle mods to 2 of my Savages. Then I'll work on the throttle return spring scenario....
09-07-2008, 12:01 PM
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RE: Throttle return spring
I keep things simple. use a low tension rubber band. enough to keep the carb closed in failure and weak enough to not put stress on the servo.
09-07-2008, 08:00 PM
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RE: Throttle return spring
ORIGINAL: traxxaskid109
I keep things simple. use a low tension rubber band. enough to keep the carb closed in failure and weak enough to not put stress on the servo.
I keep things simple. use a low tension rubber band. enough to keep the carb closed in failure and weak enough to not put stress on the servo.
09-07-2008, 10:55 PM
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RE: Throttle return spring
ORIGINAL: Stablock
I never even thought about that. Interesting. But I don't think I would test it.
ORIGINAL: ThunderbirdJunkie
And the typical scenario for THAT would be that the ball end comes off the carb pull....which means you still have brakes.
My brakes can stop my truck at WOT, so all is good
ORIGINAL: Stablock
Reasons for keeping it on? The only thing I can think of is if your linkage comes apart then there is a possibility of a runaway with out the spring . But, the chances of that are unlikely.
Reasons for keeping it on? The only thing I can think of is if your linkage comes apart then there is a possibility of a runaway with out the spring . But, the chances of that are unlikely.
My brakes can stop my truck at WOT, so all is good
09-07-2008, 10:56 PM
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RE: Throttle return spring
ORIGINAL: tmanbu
Are any of you guys using any different return springs other than HPI, like Traxxas or Losi.
Thanks
Are any of you guys using any different return springs other than HPI, like Traxxas or Losi.
Thanks
09-08-2008, 08:39 PM
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RE: Throttle return spring
ORIGINAL: Stablock
What failure are you refering to?
ORIGINAL: traxxaskid109
...enough to keep the carb closed in failure ....
...enough to keep the carb closed in failure ....
In the event your linkage somehow goes bad. That really is the only mechanical malfunction possible, or within reason at least, but not including electrical malfunctions like a bad servo. The only other thing that may go wrong is a jammed carb which actually happened to me last year, but that rarely happens.
