Hello all!
I have a stealth bomber clone 26x4.0 fat tire ebike. I do long distance work commuting, 100km round trip 5 days a week at variable speeds (70-90kmh for 15 km, then 60-70kmh for about 5-10km, then 40-50kmh for the remaining 20km). This is all variable terrain with some large hills and slopes.
My current specs are:
205 V3Ti 4T (statorade and hubsinks added)
Fardriver ND72530 (daily tune 90 line, 270 phase)
72v50ah Vtc5a cells with 420A xiaoxang smart Bluetooth BMS
I'm currently using a tune meant for 6kw where speed ratios are not all set 100% and it's great but with my beast battery I def can push more. At the 6kw tune my motor temp is very stable, not exceeding 120c. I recently tried out 10kw (139 line, 300 phase) and my motor was getting pretty hot, up to 124c where I got worried and backed down on the tune.
I keep reading that 150c is safe and 180c is the danger point but the zip ties I replaced in the core holding the phase wires are the green ones rated for 130c so I would think to keep it below that.
The default white or black zip ties siaecosys uses are only rated for around 85c so for those who don't replace the stock zip ties, I'm curious how those motors survived.
In the previous years I had a old 2kw 205 45H motor with no temp sensor that I pushed to 6kw. The zip ties melted inside, causing one of the phase wires to rub against the motor cover. Although I was able to fix this, I would prefer not to have to do it again.
So in a nutshell, I want more power but don't want to repeat history. What would you guys say is the ultimate safe temp for nominal power output?
I'm also heavy, 260lbs with gear on and my bike is damn heavy. Weight is always the determining factor to heat..
I'll post my full tune, bms and fardriver settings soon.
I have a stealth bomber clone 26x4.0 fat tire ebike. I do long distance work commuting, 100km round trip 5 days a week at variable speeds (70-90kmh for 15 km, then 60-70kmh for about 5-10km, then 40-50kmh for the remaining 20km). This is all variable terrain with some large hills and slopes.
My current specs are:
205 V3Ti 4T (statorade and hubsinks added)
Fardriver ND72530 (daily tune 90 line, 270 phase)
72v50ah Vtc5a cells with 420A xiaoxang smart Bluetooth BMS
I'm currently using a tune meant for 6kw where speed ratios are not all set 100% and it's great but with my beast battery I def can push more. At the 6kw tune my motor temp is very stable, not exceeding 120c. I recently tried out 10kw (139 line, 300 phase) and my motor was getting pretty hot, up to 124c where I got worried and backed down on the tune.
I keep reading that 150c is safe and 180c is the danger point but the zip ties I replaced in the core holding the phase wires are the green ones rated for 130c so I would think to keep it below that.
The default white or black zip ties siaecosys uses are only rated for around 85c so for those who don't replace the stock zip ties, I'm curious how those motors survived.
In the previous years I had a old 2kw 205 45H motor with no temp sensor that I pushed to 6kw. The zip ties melted inside, causing one of the phase wires to rub against the motor cover. Although I was able to fix this, I would prefer not to have to do it again.
So in a nutshell, I want more power but don't want to repeat history. What would you guys say is the ultimate safe temp for nominal power output?
I'm also heavy, 260lbs with gear on and my bike is damn heavy. Weight is always the determining factor to heat..
I'll post my full tune, bms and fardriver settings soon.
