Nice donor ebike....one of my 14 ebikes is the same '00 EVG SX. Though I'm using a 42.5v lithium poly 8Ah hour battery (5lb) in the side case. I've upgraded the front chaingear to a 46t for top end pedaling. I'm getting 20+mph on level ground & around 27.5mph on a slight downhill. But I've too kept the original 36v controller which keeps the front & rear lights (brakes lights), horn & cruise control.
I would think that the original geared heinzmann would work better for you on the hills?
Oh hey dude.. you need to add more lipos in parallel. you are trashing those batteries. If lipos are sagging more than a few volts you are stressing them and they won't last long. I bet they get hot.
I got some strange effect when I was going uphill to long. The motor kind of loosed the grip on the magnets and was spinning like crazy. After the motor cooled then I could run it as normal. But between that time it was kind of weakened.
@0urGaia you're right, it's not efficient riding at such power, just wanted to take motor and controller to the edge... 1500-2000Watts maximum is recommended
@ibrouk With the "Cycle Analyst" computer installed, it's a snap to half the amps the controller will use and thus increase your range drastically. (You can control many settings)
That is a pretty sophistocated E-Bike. =P I like it. (Though you're right. With a 20 AH battery pack, that bike can't get much range at those settings.)
@ibrouk I have never seen a lipo with bms. If you don't mind me asking, where do you find such a thing? Also, must u separate the pack to charge it or is there 1 simple charger like LiFePo4 that leads into the bms?
@staver76 with BMS a battery can be treated as black box, over/dis/charge protection and balancing are managed by BMS, there are only to cables: charging and discharging. Yes, regular LiFePO4 charger can be used as long as it has correct voltage. We (ebikessf.com) can sell 14S and 20S LiPO BMS but without any warranty - they're very easily damaged by incorrect wiring. Matching chargers are also available.
@neptronix, Yes agree but if can use the hub motor though gears (stokemonkey etc) should help reduce wattage as hubs can loose 30%+ efficiency on hills (losses result in heat build-up). Remember seeing a yt video of someone mounting a hub on front downtube, chained to front peddle sprocket, could climb mountains like a billy goat.
@0urGaia Depends on the motor actually.. some DD hubs do have narrow efficiency bands, some wider.. Geared motors have very wide efficiency bands and are different too.
As for more amps, the closer you are to your cruising speed on hills, the more efficient the motor is, that is why it is imperative to feed the motor all the amps it can take to keep the speed high.
As for the gear ratio idea you mention, that effect can be had by changing the winding of the motor and adjusting the voltage.
@neptronix, In my neck of the woods there are lots of hills that a dd hub cannot tackle at its efficiency range which is why I have fixation in gearing a hub. Been looking at doing something similar to M-Drive from Urban Commuter Store to build bike capable of > 100Km (60 mile) range for touring. Good point about adjusting voltage for preferred efficiency range, I haven't clicked on that, thanks
@0urGaia I climb 7% grades for extended periods of time with my MAC ( identical to BMC ) motor. Completely possible to do - you just have to know what you're doing to select the components.
Yeah, amp usage goes up with speed, mostly due to aerodynamics. The lower the voltage, the lower your top speed is, the lower the amp usage is .. kinda all comes together.
What i was saying originally though, is that this motor may be able to handle a little more amps to keep it in it's efficiency range.
Nice donor ebike....one of my 14 ebikes is the same '00 EVG SX. Though I'm using a 42.5v lithium poly 8Ah hour battery (5lb) in the side case. I've upgraded the front chaingear to a 46t for top end pedaling. I'm getting 20+mph on level ground & around 27.5mph on a slight downhill. But I've too kept the original 36v controller which keeps the front & rear lights (brakes lights), horn & cruise control.
I would think that the original geared heinzmann would work better for you on the hills?
kauaikit 4 months ago
Oh hey dude.. you need to add more lipos in parallel. you are trashing those batteries. If lipos are sagging more than a few volts you are stressing them and they won't last long. I bet they get hot.
neptronix 6 months ago
You need to bump this motor up to 50a.... ;)
neptronix 6 months ago
This has been flagged as spam show
You are a wild man.
Anothercoilgun 7 months ago
I got some strange effect when I was going uphill to long. The motor kind of loosed the grip on the magnets and was spinning like crazy. After the motor cooled then I could run it as normal. But between that time it was kind of weakened.
nattsurfaren 8 months ago
Engine is very impressive but its certainly eating watts on those hills.
0urGaia 8 months ago
@0urGaia you're right, it's not efficient riding at such power, just wanted to take motor and controller to the edge... 1500-2000Watts maximum is recommended
ibrouk 8 months ago
@ibrouk With the "Cycle Analyst" computer installed, it's a snap to half the amps the controller will use and thus increase your range drastically. (You can control many settings)
That is a pretty sophistocated E-Bike. =P I like it. (Though you're right. With a 20 AH battery pack, that bike can't get much range at those settings.)
WittTristan 8 months ago
@ibrouk I have never seen a lipo with bms. If you don't mind me asking, where do you find such a thing? Also, must u separate the pack to charge it or is there 1 simple charger like LiFePo4 that leads into the bms?
staver76 3 months ago
@staver76 with BMS a battery can be treated as black box, over/dis/charge protection and balancing are managed by BMS, there are only to cables: charging and discharging. Yes, regular LiFePO4 charger can be used as long as it has correct voltage. We (ebikessf.com) can sell 14S and 20S LiPO BMS but without any warranty - they're very easily damaged by incorrect wiring. Matching chargers are also available.
ibrouk 3 months ago
@ibrouk Thanks so much! Now just if the lipo lifespan would exceed 250-500 charges....
staver76 3 months ago
@ibrouk What's the top speed this beauty can run at?
staver76 2 months ago
@staver76 about 38-40mph on a flat, and at more reasonable current, like 25-30A instread of 40, about 33-35mph
ibrouk 2 months ago
@0urGaia Hills will eat watts for breakfast on any motor. Gravity is a bitch :)
Cars have 3-20 times more power than what's needed to cruise for a reason. It takes many multiples of that cruise power to get up hills.
neptronix 6 months ago
@neptronix, Yes agree but if can use the hub motor though gears (stokemonkey etc) should help reduce wattage as hubs can loose 30%+ efficiency on hills (losses result in heat build-up). Remember seeing a yt video of someone mounting a hub on front downtube, chained to front peddle sprocket, could climb mountains like a billy goat.
0urGaia 6 months ago
@0urGaia Depends on the motor actually.. some DD hubs do have narrow efficiency bands, some wider.. Geared motors have very wide efficiency bands and are different too.
As for more amps, the closer you are to your cruising speed on hills, the more efficient the motor is, that is why it is imperative to feed the motor all the amps it can take to keep the speed high.
As for the gear ratio idea you mention, that effect can be had by changing the winding of the motor and adjusting the voltage.
neptronix 6 months ago
@neptronix, In my neck of the woods there are lots of hills that a dd hub cannot tackle at its efficiency range which is why I have fixation in gearing a hub. Been looking at doing something similar to M-Drive from Urban Commuter Store to build bike capable of > 100Km (60 mile) range for touring. Good point about adjusting voltage for preferred efficiency range, I haven't clicked on that, thanks
0urGaia 6 months ago
@0urGaia I climb 7% grades for extended periods of time with my MAC ( identical to BMC ) motor. Completely possible to do - you just have to know what you're doing to select the components.
Yeah, amp usage goes up with speed, mostly due to aerodynamics. The lower the voltage, the lower your top speed is, the lower the amp usage is .. kinda all comes together.
What i was saying originally though, is that this motor may be able to handle a little more amps to keep it in it's efficiency range.
neptronix 6 months ago