hahaha well i cant say ofcourse since i didnt make them, but you should be weary of it, i would love to see some maths behind the gears if somebody can give it.
Jens did definitely run dual 80100 with that gears. Maybe he has some numbers or experience to share? @NoWind
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My bad, I misread that statement.
From my expierence it all depends on right gearmesh, the MODUL2 survive 80100 with alot of amps or SSS INRUNNER with alot of Speed, but if its not setup right, this means too much backlash it will be dead within no time … generell a 4WD build will be more relaxed on gears then a dual one IMO
In this video you see numbers of power, from ackmaniac app, 8072 on VESC6 noLIMIT FW
never done some math on gears, in generell the M2 gear is not a oversized ISO-06 Chain, that means that failures from loose screws or wrong adjustmend will end with stripped gears, thats the price for very compact design, but as i said in beginning it holds up very well if very well adjusted … customers running setups with 80100 or 8085 or MAX6 high torque ESC for years, yeh thats my NUMBERS
cheers
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Do you have a good picture from the hanger with motors on it? How many space do you have. I am maybe thinking off going to 80mm motors but don’t know if I have the space to do it. Because I need a 80mm adapter to mount the motor on my 1:5 hellical drive.
You’re my hero Jens
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I would be interested to know as well if you actually need axle/truck extensions to fit dual 80100 with the etoxx drive? @Chibatterysystems
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LOL if ya sleep in your workshop with your boards by your side, not enough money for repair your car… YEAH well then i´m a HERO (((
Well i´m also interrested in @Chibatterysystems pictures … i think its pretty possible because a 8085 can be fitted with APS 80MM Geardrive without problems, bara uses Truckextensions wich give you around 50mm more width, so enough for 80100 … by myself i used a extendet Trampa Truck(100MM plus) to fit my 80100 even with a FX Steering Damper between the Motors, documented here in this VID :
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If that in the video is +10cm and @Chibatterysystems has +5cm with a visible gap in between the motors, it looks like the 80100 will fit without any extension?
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Nope 80100 will NOT fit on a regular Trampa 16Inch MTB Truck with our Geardrives.
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I am looking for new motors. (You will hear those motorbearings scream at the Brussel event). My 6880 motor bearing are rusted after sitting my board for 1month. So now I want something bigger then those. 80100 would be cool but I see that it is not possible.
What about 8085? They will fit easily and are still an upgrade. They are available in the same style as the 80100 or in a different style from maytech (but very expensive).
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I saw also those motors from maytech but they are 8074 on paper and not 8085 like advertised.
The thing is that spending extra money on a new hanger etc is not the deal breaker. When I do a upgrade I want to do it direct right. Not that I want to upgrade again after 6months.
Yeah, I saw the picture of the maytech motor’s stator compared to 80100. I haven’t seen the stator of the APS 8085 though. According to spec it is 6kw while the 80100 is 7kw.
But you don’t need a new hanger, just an axle extension.
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Jens is coming to Brussel so I have enough time to check everything out and have a conversation 
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I have to say i really do like your mindset here, Tractor pulling style!! 
I think you have picket really good stuff for your build.
Lets do a smal analysis of possible max power from the complete system
40T discharge curves up to 30A:
https://lygte-info.dk/review/batteries2012/Samsung%20INR21700-40T%204000mAh%20(Cyan)%20UK.html
Peak (for about 10s)
Battery:
Will Sag to about 3.7V instant at 45A load since it sag to 3.8v during 30A load.
Possible peak 3,7V45A15p*12s = 30 000 kW
Motor:
3,7V * 12s * 4pcs(motors) * 190A (motor) * 0.9 (duty cycle) = 30 370 W
Vesc:
190A motor & 169A Battery per Vesc should work for Peak.
Result Possible!
Continous (one full cycle from 100-0%)
Battery:
Will Sag to 3.2V in 5 min during 30A load and go up by +50C in temp.
3,2V * 12s * 15p * 30A = 17 280W
Battery will get hot before 5 min which point about 17 kW is max output.
Motor:
I have a hard time to estimate how long it will take before the motors get hot, but at 5 kw / motor i think it will go kinda quick
Vesc:
Vesc will probably get hot kinda fast with 5 kw continuous load, hard to estimate too.
Result Possible for a minute or two!
I think cooling will be the most important part if you want to pull 30kW peak and as close to 20kW as possible for a longer time.
Good luck with your build and load cases 
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Thanks for the write up Man! Loving the figures
My plan for cooling is 1/4inch thick aluminum plate which the vescs will be bolted and possibly attached that to my aluminum enclosure (so there can be some heat exchange) Thermal grease between layers. Hoping that’s enough
So you think I can actually claim 40hp??
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I think that the aluminium with vesc 6 will help alot. One thing to remember is if you increase current by 2x the losses (heat) will increase by ^2.
Ex. 3x current = 9x heat.
Good question.
I think so in theory.
In practice you will need to:
- Get vesc to accept about 170A battery and 190A motor per vesc.
- Get a load which will make the board need 30 kw to accelerate from 90% of top speed. Example 50 kilo backpack, get speed on flat and max accelerate upp hill. (Might be enough to get the load reqiured)
- You need to run the board up to 90% dutycycle and acelerate max to be able to get max power out.
- Get wheels to not spin and don’t fall off. 50 kg backpack might help.
- Strengthen motor mount, I know 80100 which made gear drive come lose because of the high torque with lower motor amp. I have seen a crossbar solution which have helped at lower loads.
- Bam 30 kW on metr
Please do not just put in these values. You need to try your way up. I don’t even know if the motor can handle above 150 motor ampere.
45A per cell is also very high load. Lygte state that it should work for 10sec.
Good luck and be carefull!
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Few thoughts.
Isn’t that super unrealistic? I thought the vesc 6 is rated for 80A or 90-100A with very good cooling.
In my experience no. 150A would mean that you hit the rated max peak power of 7kw which is somewhat optimistic. The motor will get hot if it regularly sees peaks of 130A. 7kw is absolute max peak, continuous power is more like 1-2kw.
Although this will definitely work it will decrease cycle life.
I am very interested what the actual measured power draw will be. I assume it is well under 30kw. @Chibatterysystems will you get telemetry from all four vescs? That will be necessary to judge the real world power.
Trampa write that they can handle peak 120A peak. With extra cooling and short peaks it might be able to handle those currents. But it is risky.
Heat will be a problem quick since you get alot of heat when you increase current with the same copper amount.
I know they can handle 140A motor peak, at alienpowe homepage they state max is 200A.
1-2 kW might be max load continous without getting hot. My 6374 get abit warm at 700w/motor continous but can easily handle 2.5 kw peak.
I agree that it will be very hard to reach one peak at that power, but I don’t think it is unrealistic to so once.
The case I stated 1-6 is to try to get there and i also think it would be very hard and might not work. Fault_Over_current is a big risk to get since the currents is so high for the motor.