T E A M
Thought I will just share with you guys my custom mini lst single servo conversion.
This is my setup:
-3S 25C 1500mah lipo
-5100KV 6T 380S (28x35mm) brushless motor from himodel & Yeah racing 380 Heatsink with 25T pinion - 1/18 xcelorin (22x35mm) 7400 KV brushless motor with
18T pinion
-35A EZrun brushless esc by Tekmodel
-Custom single servo setup
-Stock for everything else
I used a HXT low profile servo and a 3Racing Aluminium Ball Bearing Steering Saver for the Mini Inferno in this conversion. Part of the chassis had to be
hacked off for this conversion. I had to design my own front bottom chassis plate so that I can fit the 3racing servo saver in. A plastic support plate
had to be added to secure the servo saver from the top as well as to act as the platform for the standard size servo. The standard size servo is attached
to the top support plate via 4 brass 10mm spacers. The steering links shown in the picture are GPM titanium turnbuckles but the stock turnbuckles can be
used. Now my mini lst can go straight. No more slope in the steering.
Total cost for single servo conversion: $49.
4 2x5mm cap screws $2
3Racing servo saver for mini inferno $23
Plastic sheet $4
4 x 10mm spacer $1
HXT low profile servo $19
The exotek single servo conversion (without servo) cost US$80 but it has carbon fiber chassic plates which makes the mini lst lighter.
I was running my mini lst with a xcelorin 1/18 7400KV (22x35mm 53g) brushless motor initially. It has surprisingly very good torque for its size. The
magnets used are very strong in this motor. With an 18T pinion, it was runnning at around 25mph (this is only a very rough gauge as I don't have a radar
gun) on smooth concrete ground. Very quick accerleration and pretty fast top speed. However it was running too hot for my liking. With the body shell on,
after making passes, doughnuts, braking hard for around 5 min, the motor got so hot that it almost burnt my finger when I touched it for a split second.
It was close to boiling hot I guess. 80 to 90 degree celsius perhaps. The heat wasn't so bad with the body shell off though. I need a a fan and a
heatsink I guess if I want to carry on using this motor. However looking at the power that this tiny motor motor can deliver, I will say that it will do
very well in lighter models. The mini lst weighs at around 978g with the 1/18 xcelorin motor.
Due to the fact that the xcelorin motor was like a little heater inside my mini lst, I sourced for a bigger motor and found the himodel 5100Kv (380S)
brushless motor. It has ventilation holes so it should run cooler. The diameter of the motor can is 28mm and so the minimum pinion size that works on the
stock spur gear is 25T (if you use a smaller pinion, the pinion teeth will not come into contact with the spur gear). Initial tests showed that this
motor has a lot of torque. If I rate the 1/18 7400kv xcelorin at 5, this motor will at least have a 8 or 9. In fact it has so much torque that it broke
my stock center differential that had no problem with the xcelorin motor. The himodel motor (98g) is alot heavier and that adds onto the weight of the
truck. I guess the increase in weight (over 1kg now) as well as the added torque caused the center diff to fail. Anyway, I modded the center diff by
hacking and fitting spider gears from the front/rear diff onto it. It is very clicky but at least it survives the himodel motor now.
You can see the size difference of the xcelorin motor and the himodel motor in one of the pictures.
I haven't got the chance to do speed runs yet. Only did quick acceleration and hard braking so far. Will update this thread once I do further testings.
This is my setup:
-3S 25C 1500mah lipo
-5100KV 6T 380S (28x35mm) brushless motor from himodel & Yeah racing 380 Heatsink with 25T pinion - 1/18 xcelorin (22x35mm) 7400 KV brushless motor with
18T pinion
-35A EZrun brushless esc by Tekmodel
-Custom single servo setup
-Stock for everything else
I used a HXT low profile servo and a 3Racing Aluminium Ball Bearing Steering Saver for the Mini Inferno in this conversion. Part of the chassis had to be
hacked off for this conversion. I had to design my own front bottom chassis plate so that I can fit the 3racing servo saver in. A plastic support plate
had to be added to secure the servo saver from the top as well as to act as the platform for the standard size servo. The standard size servo is attached
to the top support plate via 4 brass 10mm spacers. The steering links shown in the picture are GPM titanium turnbuckles but the stock turnbuckles can be
used. Now my mini lst can go straight. No more slope in the steering.
Total cost for single servo conversion: $49.
4 2x5mm cap screws $2
3Racing servo saver for mini inferno $23
Plastic sheet $4
4 x 10mm spacer $1
HXT low profile servo $19
The exotek single servo conversion (without servo) cost US$80 but it has carbon fiber chassic plates which makes the mini lst lighter.
I was running my mini lst with a xcelorin 1/18 7400KV (22x35mm 53g) brushless motor initially. It has surprisingly very good torque for its size. The
magnets used are very strong in this motor. With an 18T pinion, it was runnning at around 25mph (this is only a very rough gauge as I don't have a radar
gun) on smooth concrete ground. Very quick accerleration and pretty fast top speed. However it was running too hot for my liking. With the body shell on,
after making passes, doughnuts, braking hard for around 5 min, the motor got so hot that it almost burnt my finger when I touched it for a split second.
It was close to boiling hot I guess. 80 to 90 degree celsius perhaps. The heat wasn't so bad with the body shell off though. I need a a fan and a
heatsink I guess if I want to carry on using this motor. However looking at the power that this tiny motor motor can deliver, I will say that it will do
very well in lighter models. The mini lst weighs at around 978g with the 1/18 xcelorin motor.
Due to the fact that the xcelorin motor was like a little heater inside my mini lst, I sourced for a bigger motor and found the himodel 5100Kv (380S)
brushless motor. It has ventilation holes so it should run cooler. The diameter of the motor can is 28mm and so the minimum pinion size that works on the
stock spur gear is 25T (if you use a smaller pinion, the pinion teeth will not come into contact with the spur gear). Initial tests showed that this
motor has a lot of torque. If I rate the 1/18 7400kv xcelorin at 5, this motor will at least have a 8 or 9. In fact it has so much torque that it broke
my stock center differential that had no problem with the xcelorin motor. The himodel motor (98g) is alot heavier and that adds onto the weight of the
truck. I guess the increase in weight (over 1kg now) as well as the added torque caused the center diff to fail. Anyway, I modded the center diff by
hacking and fitting spider gears from the front/rear diff onto it. It is very clicky but at least it survives the himodel motor now.
You can see the size difference of the xcelorin motor and the himodel motor in one of the pictures.
I haven't got the chance to do speed runs yet. Only did quick acceleration and hard braking so far. Will update this thread once I do further testings.
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