Author Topic: hobbywing 120a 1s 1/12th questions  (Read 1910 times)

Offline reaper.zn

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hobbywing 120a 1s 1/12th questions
« on: February 03, 2014, 11:16:24 AM »
hi all
im new to the 1/12th scene and only raced it once at the dmcc nationals in sept but i have a few questions .
i notice alot of guys disable there overheat and lipo cut off settings on the esc , is that the way to go ?
i run the hobbywing 120a 1s v2.1 with a speed passion endless 4.5t motor .
i know sarda rules are 10.5 blinky now but we still running the old rules at our natal championships events .
i ran the mod software and that seemed good but i want to try the stock software and need help on esc settings
any help would be greatly appriciated  :)
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Offline reaper.zn

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Re: hobbywing 120a 1s 1/12th questions
« Reply #1 on: February 03, 2014, 11:21:35 AM »
oh and i noticed at our first race meeting at dmcc that after 4 1/2 minutes of racing the car started loosing speed .
i was running the mod software and my gearing was 14\72 which works out to around a 32.39 rollout .
the lipo is fine but i noticed the green light started flashing on the esc which according to the manual is the over heat protection setting .
am i over revving maybe with that gearing ?
the motor was 41 deg and the esc was 53 deg , it was a very hot day also .
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Offline Charel

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Re: hobbywing 120a 1s 1/12th questions
« Reply #2 on: February 03, 2014, 11:57:42 AM »
At those temps the motor nor the esc should go into thermal mode.
I run my 12th with the voltage & thermal protection turned off, so it will not do as you described in you post.
If you have tested your car and monitored the temps and know you safe then go ahead and turn them off then you know you wont get any funny esc interference during a race.
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Offline Skitee

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Re: hobbywing 120a 1s 1/12th questions
« Reply #3 on: February 03, 2014, 04:37:17 PM »
Did you confirm those temps with another known working temp gun? The temp on both of those is too low to cause the fade. It may be the battery isn't holding the voltage well and when the esc starts boosting the battery just can't supply the volts that are being requested.
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Offline reaper.zn

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Re: hobbywing 120a 1s 1/12th questions
« Reply #4 on: February 03, 2014, 04:42:39 PM »
thanks guys
i did test those heats with 2 temp gauges and i also tried another lipo and same story.
any idea what the normal temp of the esc should be after a run ?
im using the orca  infinite 6500 70c lipo which i hear is good  :)
i wanted to turn those 2 safety settings off but i was so worried something would blow , but i will try it out  :D
what would be a good start on esc settings , boost etc etc
also on another note is i was running with the mod software with no timing and only 10deg boost.
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Offline Skitee

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Re: hobbywing 120a 1s 1/12th questions
« Reply #5 on: February 03, 2014, 04:49:34 PM »
You've got quite a bit of headroom to play with on the esc temp, so it should not be a problem to disable the protection. Last year when we still ran mod I didn't run any boost and only used turbo for top end, the 4.5 had more than enough at the bottom so I wouldn't run any boost.
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Offline reaper.zn

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Re: hobbywing 120a 1s 1/12th questions
« Reply #6 on: February 03, 2014, 04:55:02 PM »
thanks for all the advice.
i also notice alot of guys dont use the heatsink or fan , is that fine ?
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Offline Skitee

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Re: hobbywing 120a 1s 1/12th questions
« Reply #7 on: February 03, 2014, 05:00:48 PM »
For mod I would recommend at least the heatsink, I can understand the reasoning for the fan though because it robs some voltage.
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Offline reaper.zn

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Re: hobbywing 120a 1s 1/12th questions
« Reply #8 on: February 03, 2014, 05:15:38 PM »
ok cool
thanks again buddy  :D
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