very slow Score with castle sidewinder + 3800 kv

[lucam1340]

Hi everybody

Today I have just finished mounting on my first Yeti score kit a castle sidewinder combo with 3800kv motor, and a 2s 6000 battery, I have a stock 64t spur gear and a 14t pinion, I have bind the radio (Spectrum dx4c avc) with the receiver, and I have put the car on the track to test it, but the result it's very frustrating, the car has good start acceleration, but it's really really slow!! Especially if the car start to climb a little hill.....it slowdown drastically
Did I have to set something on the esc??

[Lanky]

did you calibrate the ESC to the radio? are you sure you don't need to reverse the motor in the ESC firmware?

[mikemcE]

I run a 64/13 on 3s and it's slow , by design for crawling. My Tekin is a 3000kv HD , I would not think of running a 3800 in my yeti due to the weight.
How much does yours weigh ?
Can size is torque, see the difference in the two cans ?




Hang up and Drive

[lucam1340]

Hi Lanky I have followed the quick start guide.....maybe I have to connect the esc with the castle link and setting up by pc? it's my first rc car (till now I have used just rc helicopter and plane) so I really don't know where to put my hands.

Mickemce I have talked with a lot of people that have used that motor with the Yeti with no issues, I don't want believe that motor it's not good for that car.....also the seller suggest me to buy it for the yeti!! maybe I have to change spur gear or pinion?

[magic_yeti]

I also started with this combo and it's a great motor for the yeti, but if u use the sidewinder esc with the 3800kv 1410 is only rated 2s, 3s it's your own risk

on 2s with the stock 16/64 it was really too slow for me.
So i switched to another esc Monster X and 3s and the fun started.
Right now i'm on 19/64 gearing on 3s, pure fun

first of all go up with the pinion, i would try 19/64 on 2s to gain speed, maybe 21. and check temps of motor and esc.
or go 3s on risk or with another esc mamba x for example

[mikemcE]

I have 2 of the 3800 castles and love them, in a lighter truck. My Yeti is a bit under 9#, that is a heavy rig for a 3800, the lower Kv and more voltage makes the truck run. I ran a 19/64 and it was way too fast for me, but I have mine tuned for slow, not speed. Heat is always an issue, I live with my temp gun

I also only run 3s, so that was the main reason on the 3800, along with I wanted a sensored motor

Hang up and Drive

[RustyUs]

Originally Posted by lucam1340

Hi everybody

Today I have just finished mounting on my first Yeti score kit a castle sidewinder combo with 3800kv motor, and a 2s 6000 battery, I have a stock 64t spur gear and a 14t pinion, I have bind the radio (Spectrum dx4c avc) with the receiver, and I have put the car on the track to test it, but the result it's very frustrating, the car has good start acceleration, but it's really really slow!! Especially if the car start to climb a little hill.....it slowdown drastically
Did I have to set something on the esc??

How slow is "really slow"? With normal sized SC tires on the Yeti/Score TT, with 64/14 gears, and going downhill ...you should be somewhere in the 16mph zone .

Anyone that has run a SCT, and then given a chance to run this Axial platform, will more than likely be disappointment on 2S performance. Doing the trophy truck on 3S will more than likely get you where you want to be.

Like it's been said before, situations like this (Finding the maximum speed sweet spot for any motor/battery/gearing combo), you should not be without an IR thermometer of some sort.

[lucam1340]

Ok before list my brand new motor on ebay....I'll try some tips you gave me
I would try to set up by pc the esc also.
I hope in the week end I have time to make all the test you suggest me.

Originally Posted by magic_yeti

I also started with this combo and it's a great motor for the yeti, but if u use the sidewinder esc with the 3800kv 1410 is only rated 2s, 3s it's your own risk

on 2s with the stock 16/64 it was really too slow for me.
So i switched to another esc Monster X and 3s and the fun started.
Right now i'm on 19/64 gearing on 3s, pure fun

first of all go up with the pinion, i would try 19/64 on 2s to gain speed, maybe 21. and check temps of motor and esc.
or go 3s on risk or with another esc mamba x for example

[lucam1340]

I have not weighted but it's all stock parts so I think it's around 6,5lb


I have seen that castle gearing chart suggest a 54t spur gear on 11-15t pinion, so I can try to mount a new spur gear also.

Originally Posted by mikemcE

I have 2 of the 3800 castles and love them, in a lighter truck. My Yeti is a bit under 9#, that is a heavy rig for a 3800, the lower Kv and more voltage makes the truck run. I ran a 19/64 and it was way too fast for me, but I have mine tuned for slow, not speed. Heat is always an issue, I live with my temp gun

I also only run 3s, so that was the main reason on the 3800, along with I wanted a sensored motor

Hang up and Drive

[lucam1340]

You are right....but believe me...it's slow with no slow interpretation....i'll try to shot a video and post, so there will be no doubt about the "slow" meaning ! :-)

Originally Posted by RustyUs

How slow is "really slow"? With normal sized SC tires on the Yeti/Score TT, with 64/14 gears, and going downhill ...you should be somewhere in the 16mph zone .

Anyone that has run a SCT, and then given a chance to run this Axial platform, will more than likely be disappointment on 2S performance. Doing the trophy truck on 3S will more than likely get you where you want to be.

Like it's been said before, situations like this (Finding the maximum speed sweet spot for any motor/battery/gearing combo), you should not be without an IR thermometer of some sort.

[magic_yeti]

Mine is round 10 lbs and MMX and cc1410 3800kv with 19/64 on 3s ist doing fine

sent by magic_yeti

[lucam1340]

at worst I have to change just the esc

[Kapti]

I have my score set up 2wd so its a bit different as far as load goes. But as far as speed with that set up I am running a 25 pinion with a 52 spur on 2s. It is fast enough to be fun but i wouldnt consider it as excessive.

Sent from my SM-N920P using Tapatalk

[rcbasser]

Is there any chance that you reversed the throttle channel on your radio instead of via ESC programming? The reason I ask is, if your reverse gear power setting is set to 50% but you reverse the channel on your radio, then you would only get 50 % power going forward and full reverse power. When you accelerate forward, is the green light coming on your ESC or the red light?

[lucam1340]

Ok I understand what would be the problem, I hope to check as soon, even if when I go backward the car seems to have same low power

thanks

Originally Posted by rcbasser

Is there any chance that you reversed the throttle channel on your radio instead of via ESC programming? The reason I ask is, if your reverse gear power setting is set to 50% but you reverse the channel on your radio, then you would only get 50 % power going forward and full reverse power. When you accelerate forward, is the green light coming on your ESC or the red light?

[PileDriver]

Does the motor get unusually warm? I had this problem when I first built my yeti and I over torqued the transmission case together using a drill for assembly haha. I backed the screws off and it was good to go. I'm running a stubby 3300kv from Holmes on 3s and it's fast enough.

[lucam1340]

Hi Everybody

Thank you for all the tips you gave me, yesterday I found the problem !!! first I have linked the esc to my pc with castle link, but everything seems to be ok, so i try to change the battery........after that the game start!!!!
I have used a stripped battery!!! so my set up doesn't receive right electricity.
The car performance change drastically!! Now for my skill speed is enough !!!
I bought one 18T pinion I will use in the future if I will need more speed!!!

NOW I'm very happy with my SCORE!!