Kagama Lee Spring Servo Saver Spring - What you need to know

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Horatio said:
With the spring, we're speccing a rate that can hold all the typical dynamic loads on the surfaces we normally run, so as to maintain authority,
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Which is my problem as my Asuga is clearly somtimes understeering when taking corners on asphalt. I can see that the tires often are not turning as far as I am commanding them, there is enough force/resistance to prevent them from reaching the commanded angle.
 
Atomic Skull said:
Which is my problem as my Asuga is clearly somtimes understeering when taking corners on asphalt. I can see that the tires often are not turning as far as I am commanding them, there is enough force/resistance to prevent them from reaching the commanded angle.
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For the avoidance of doubt, the term 'understeer' normally refers to a car's tendancy to push during cornering, scrubbing the tyres, and is a handling attribute mitigated by chassis/suspension/geometry tuning, weight distribution and tyre choice, rather than anything to do with achieved lock or torque steer.

So what you are saying, is that you are giving an input and the tyres are not moving in accordance with your input on asphalt? 🤔

What servo are you running? Maybe it's gone weak?

I can assure you that with a LC 085J 0 M, it won't be due to any 'give' in the servo saver under those conditions. The Asuga wheels/tyres are comparatively light and small compared to what I blast the XTR around with. The JetKos are about 440g per corner. When they're spinning, that's a lot more gyroscopic force than with Asuga wheels/tyres.

Check your horn - perhaps the splines are damaged? Is the steering centering ok, or do you find you have to adjust the trim a lot?
 
Horatio said:
For the avoidance of doubt, the term 'understeer' normally refers to a car's tendancy to push during cornering, scrubbing the tyres, and is a handling attribute mitigated by chassis/suspension/geometry tuning, weight distribution and tyre choice, rather than anything to do with achieved lock or torque steer.

So what you are saying, is that you are giving an input and the tyres are not moving in accordance with your input on asphalt? 🤔

What servo are you running? Maybe it's gone weak?

I can assure you that with a LC 085J 0 M, it won't be due to any 'give' in the servo saver under those conditions. The Asuga wheels/tyres are comparatively light and small compared to what I blast the XTR around with. The JetKos are about 440g per corner. When they're spinning, that's a lot more gyroscopic force than with Asuga wheels/tyres.

Check your horn - perhaps the splines are damaged? Is the steering centering ok, or do you find you have to adjust the trim a lot?
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I'm so glad you wrote that definition of the term understeer, you did it so much more eloquently than I ever could 👏🏽
 
Horatio said:
For the avoidance of doubt, the term 'understeer' normally refers to a car's tendancy to push during cornering, scrubbing the tyres, and is a handling attribute mitigated by chassis/suspension/geometry tuning, weight distribution and tyre choice, rather than anything to do with achieved lock or torque steer.

So what you are saying, is that you are giving an input and the tyres are not moving in accordance with your input on asphalt? 🤔

What servo are you running? Maybe it's gone weak?

I can assure you that with a LC 085J 0 M, it won't be due to any 'give' in the servo saver under those conditions. The Asuga wheels/tyres are comparatively light and small compared to what I blast the XTR around with. The JetKos are about 440g per corner. When they're spinning, that's a lot more gyroscopic force than with Asuga wheels/tyres.

Check your horn - perhaps the splines are damaged? Is the steering centering ok, or do you find you have to adjust the trim a lot?
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I swapped the servo into the Hyper GTB I am building and it seems to work fine there.

I have never had to adjust the trim at all, set it and forget it and never had any problems

On a related note I think I through with street bashing an offroad vehicle, the Hyper GT handles so so SO much better on pavement than the Asuga ever did. Less headaches getting tires too. Going forward the Asuga shall only be run offroad as god intended and I will street bash with a proper street basher.
 
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Atomic Skull said:
I swapped the servo into the Hyper GTB I am building and it seems to work fine there.

I have never had to adjust the trim at all, set it and forget it and never had any problems

On a related note I think I through with street bashing an offroad vehicle, the Hyper GT handles so so SO much better on pavement than the Asuga ever did. Less headaches getting tires too. Going forward the Asuga shall only be run offroad as god intended and I will street bash with a proper street basher.
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Actual 'street' cars have the right geometry and 0° kick - although their layout are identical to buggies/Truggies in most regards.

1/8th Circuit and 1/10th touring cars are another level again. 🤩
 
Horatio said:
Actual 'street' cars have the right geometry and 0° kick - although their layout are identical to buggies/Truggies in most regards.

1/8th Circuit and 1/10th touring cars are another level again. 🤩
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The Hobao Hyper GTB is based off the Hyper SST buggy platform with different arms and the sideguards removed.

Two things I didn't like are that the servo mount needs to be modified for many servos or it interferes with the strain relief and the hole for the wires in the radio box is very undersized and will pinch the wires and so needs to be enlarged and the edges smoothed. Other than that I am quite happy with it.
 
Atomic Skull said:
The Hobao Hyper GTB is based off the Hyper SST buggy platform with different arms and the sideguards removed.

Two things I didn't like are that the servo mount needs to be modified for many servos or it interferes with the strain relief and the hole for the wires in the radio box is very undersized and will pinch the wires and so needs to be enlarged and the edges smoothed. Other than that I am quite happy with it.
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I used to regularly race against a team CML driver who raced the Hyper 8 Pro buggies. They were excellent. We often swapped rides without telling anyone in the finals. He'd drive my Mugen! 🤣

We often got each others cars onto the podium.

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Hobao rigs are underrated in my opinion.

Have you seen the Hobao VTE2?

Amazing rig. Just add:

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Had I not put together the Losi 22x-4 Elite, this is what I was thinking of starting for a twin motor build to give Angrysection8 a run for his money!

Maybe next year. 🤞
 
They're a fun build, I highly recommend it for anyone interested. In fairness it shouldn't take too much to overtake my budget build but she still scoots for what it is.
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Horatio said:
Have you seen the Hobao VTE2?
🤞
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I did but I was looking for something to bash around in the street not race with and the GTB roller was $300.

I do not like how the body bottoms out and long term I am thinking about getting rid of it, adding a rear buggy wing and replacing the car body with a simple fairing. I might also replace the foam bumper with a 1/10 buggy wing instead
 
Atomic Skull said:
If you order in the US it's:

1 spring: $35.46
4 springs: $62.34
5 springs: $44.80
6 springs $53.76

Cost per piece is $8.96 and the handling charge disappears at 5 springs.
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So do I just type the part # somewhere? I'm a little lost
 
Run4s said:
So do I just type the part # somewhere? I'm a little lost
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The spec sheet given here is a bit different from what they're asking, also, the part # doesn't pull anything
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Run4s said:
The spec sheet given here is a bit different from what they're asking, also, the part # doesn't pull anythingView attachment 10030View attachment 10031View attachment 10032View attachment 10033
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That's quite a rabbit hole you've been down! 🤣

  • Go to Lee Spring website
  • Enter LC 085J 0 M
  • Scroll down to spec sheet
  • Enter quantity
  • Add to basket
I did attempt to order 10 of these back in June, so I could just list them on eBay for people as single items. Sadly, they were out of stock for a week or so and I stopped monitoring.

It seems they're back in stock now. 🤩👍
 
Thanks for the dummies guide.... All ordered!

That handling surcharge though 🙄💸🙄💸🙄 buying 10 makes sense
 
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Horatio said:
That's quite a rabbit hole you've been down! 🤣

  • Go to Lee Spring website
  • Enter LC 085J 0 M
  • Scroll down to spec sheet
  • Enter quantity
  • Add to basket
I did attempt to order 10 of these back in June, so I could just list them on eBay for people as single items. Sadly, they were out of stock for a week or so and I stopped monitoring.

It seems they're back in stock now. 🤩👍
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Tnx dude! I was at the wrong website 🤣

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Hello All,

Read with great interest this thread (and the one of DaniC) and the explanation by Horatio about the servo-saver spring and that a modification towards a Lee Spring is one that makes the steering-improvement much better, not to say "beyond expectations".

How do I find out/where can I find whether such a Lee Spring fits my Spark also?

I already asked @shortround9191 if he has one or two to sell?
 
Peter V said:
Hello All,

Read with great interest this thread (and the one of DaniC) and the explanation by Horatio about the servo-saver spring and that a modification towards a Lee Spring is one that makes the steering-improvement much better, not to say "beyond expectations".

How do I find out/where can I find whether such a Lee Spring fits my Spark also?

I already asked @shortround9191 if he has one or two to sell?
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C-00180-216 servo saver spring is used for all of them.

This probably explains why its too soft - especially for the bigger rigs.

The Lee Spring will fit the spark, no probs.
 
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