MLST2 Ezrun 18a and 5200kv
10-30-2010, 09:22 PM
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MLST2 Ezrun 18a and 5200kv
Was curious if anyone could tell me what kind of performance I can expect out of 7.2v with this setup in my Mini LST2. Stock spur and pinion gear. Thanks guys!!
10-30-2010, 11:18 PM
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RE: MLST2 Ezrun 18a and 5200kv
ANYtime you jump up to a hotter motor, you have to change the gearing (smaller pinion).
I doubt that smallish amp-rated ESC could handle the load demands of your mlst.
I doubt that smallish amp-rated ESC could handle the load demands of your mlst.
10-30-2010, 11:29 PM
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RE: MLST2 Ezrun 18a and 5200kv
Wouldn't a single brushless motor be able to handle the same gearing as a far less powerful brushed motor? As far as the speed control, I'm not sure. The one Losi sells for the truck is a 25 amp esc but we'll see. The EZrun 25a esc is only $21 no shipping so if I fry it I'll buy the upgrade. Have you any idea on my question though?
10-30-2010, 11:34 PM
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RE: MLST2 Ezrun 18a and 5200kv
ORIGINAL: jrowles91
Wouldn't a single brushless motor be able to handle the same gearing as a far less powerful brushed motor?
Wouldn't a single brushless motor be able to handle the same gearing as a far less powerful brushed motor?
NO
10-31-2010, 09:22 AM
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RE: MLST2 Ezrun 18a and 5200kv
ORIGINAL: jrowles91
Ok so say I change my order to the 25a esc. THEN what improvements would you think?
Ok so say I change my order to the 25a esc. THEN what improvements would you think?
You still won't be able to run it using the stock gearing, no matter what you do.
11-05-2010, 07:05 PM
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RE: MLST2 Ezrun 18a and 5200kv
Alright, I got the system with the 25a esc. On 6 cell NiMh the thing barely get's luke warm, and used the same battery and gearing (I believe I counted it as 52 spur and 23 pinion) as my dual brushed motors. Results... 20.4 mph which is a 6 mph increase over stock!
RobbieP suggested getting a smaller pinion gear and I know that would help with launch but how would it affect my top speed? I'd like to stay where I'm at but I'm thinking maybe with easier gearing the motor can spin faster thus giving me back my top end.
Comments suggestions PLEASE!!! Thank you guys![img]
RobbieP suggested getting a smaller pinion gear and I know that would help with launch but how would it affect my top speed? I'd like to stay where I'm at but I'm thinking maybe with easier gearing the motor can spin faster thus giving me back my top end.
Comments suggestions PLEASE!!! Thank you guys![img]
11-05-2010, 10:00 PM
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RE: MLST2 Ezrun 18a and 5200kv
The 25A ESC will be plenty, they generally under-rate them so that they will seem more reliable.
As for the gearing, if the motor runs cool and you like where you are with acceleration and top speed then no need to do anything. Generally for each tooth you drop on the pinion you will lose 1-2MPH, but in some cases the added acceleration makes the car feel faster. If you are overloading the motor you can pick up top speed by dropping pinion size, but it will run hot if you overload it. Your choice in gearing is all dependent on how you want the truck to drive, your only limiting factor should be heat.
As for the gearing, if the motor runs cool and you like where you are with acceleration and top speed then no need to do anything. Generally for each tooth you drop on the pinion you will lose 1-2MPH, but in some cases the added acceleration makes the car feel faster. If you are overloading the motor you can pick up top speed by dropping pinion size, but it will run hot if you overload it. Your choice in gearing is all dependent on how you want the truck to drive, your only limiting factor should be heat.
11-06-2010, 12:36 AM
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RE: MLST2 Ezrun 18a and 5200kv
ORIGINAL: burnineyes
The 25A ESC will be plenty, they generally under-rate them so that they will seem more reliable.
As for the gearing, if the motor runs cool and you like where you are with acceleration and top speed then no need to do anything. Generally for each tooth you drop on the pinion you will lose 1-2MPH, but in some cases the added acceleration makes the car feel faster. If you are overloading the motor you can pick up top speed by dropping pinion size, but it will run hot if you overload it. Your choice in gearing is all dependent on how you want the truck to drive, your only limiting factor should be heat.
The 25A ESC will be plenty, they generally under-rate them so that they will seem more reliable.
As for the gearing, if the motor runs cool and you like where you are with acceleration and top speed then no need to do anything. Generally for each tooth you drop on the pinion you will lose 1-2MPH, but in some cases the added acceleration makes the car feel faster. If you are overloading the motor you can pick up top speed by dropping pinion size, but it will run hot if you overload it. Your choice in gearing is all dependent on how you want the truck to drive, your only limiting factor should be heat.
11-06-2010, 10:25 PM
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RE: MLST2 Ezrun 18a and 5200kv
I'm wondering how you up-graded your drive train. i have a mini raminator with lst2 diff gears and stock trans gears with dual stock motors and it breaks trans gear alot. maybe the lst2 has different trans gears then my ram but i don't know.
11-07-2010, 12:31 AM
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RE: MLST2 Ezrun 18a and 5200kv
Excellent question. I used a two part epoxy to glue the center diff and rear diff together so they are locked always. The epoxy is like 3500psi breaking strength, and haven't had a bit of trouble.
11-07-2010, 11:07 AM
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RE: MLST2 Ezrun 18a and 5200kv
MLST2? That's good to hear. How does the 18a esc hold up? Does it get hot?
Also what gearing are you using?
Also what gearing are you using?
