What motor to replace 8fun ?

[KirstinS]

Hi all

I have an 8fun motor (front) with a ku65 controller. I have a booster battery so overvoltwd at 48v nominal instead of standard 36v

My bottle battery is on last legs so am going to order a new one from BMS battery (a new style frame pack at 189 usd)

Question is - I am thinking of upgrading my motor

But

I've no idea how they react to overvolting ?

Is there a motor with that will be better than my current one and work with a ku65 ? Maybe a q100h ?

Thanks
Kirstin

 

[KirstinS]

I should add I also don't know if sine wave controllers can be overvoltwd as that's also an iption

 

[Deleted member 4366]

I've just read a few sad tales from people that overvolted the S06S. Even 12S was too much for one, so it depends on the actual controller- which FETS and capacitors it has.

How about getting a 48v battery with the 20 amp sine-wave controller and a 36v 201 rpm one of these:
http://www.bmsbattery.com/front-driving/301-250w350w-q-85100sx-motor-e-bike-kit.html

 

[awol]

I've just read a few sad tales from people that overvolted the S06S. Even 12S was too much for one, so it depends on the actual controller- which FETS and capacitors it has.

Ooh dear, not what I wanted to hear !!
How far over-volting was there being done on average?

 

[Deleted member 4366]

50v appears to be an absolute maximum, but one gut blew his with 12S . I guess it's possible something else was wrong, because he talked about "melted pcb" whatever that means.He's running his Q100C with 12S and a S12S now with the current set to the minimum.

 

[KirstinS]

I've just read a few sad tales from people that overvolted the S06S. Even 12S was too much for one, so it depends on the actual controller- which FETS and capacitors it has.

How about getting a 48v battery with the 20 amp sine-wave controller and a 36v 201 rpm one of these:
http://www.bmsbattery.com/front-driving/301-250w350w-q-85100sx-motor-e-bike-kit.html

Thanks d8veh - that's good to know

Whist your suggestion would no doubt work It does make the whole order quite a bit more

Would the qi00h work ok with the ku65 ?

 

[KirstinS]

Also I'd like to retain the booster battery approach as my current bike is fully legal without it - when I take the kids out I don't use the booster but when I conmute to work I do use it

 

[Deleted member 4366]

Thanks d8veh - that's good to know

Whist your suggestion would no doubt work It does make the whole order quite a bit more

Would the qi00h work ok with the ku65 ?

Definitely. Normally, I'd solder the shunt for a bit more pep, but not with your present battery.

 

[KirstinS]

Definitely. Normally, I'd solder the shunt for a bit more pep, but not with your present battery.

Thanks - looks like best option . A shunt mod should be ok with the new battery

 

[KirstinS]

Definitely. Normally, I'd solder the shunt for a bit more pep, but not with your present battery.

D8veh - just to confirm if you would - have you run ku65 on a q100h sensor less ?

Currently I run sensor less but cwah has had issues sensor less with this motor

Hence the question

Thanks

 

[Deleted member 4366]

Why would you want to run it sensorless? The motor has sensors, and your controller has the connector! I think sensorless will be problematic.

 

[KirstinS]

No reason to be sensor less . Just means I need to order the wiring !

Thanks though - that's exactly what I needed to know

 

[Deleted member 4366]

The Q100H comes with the wire all the way to the controller with the correct connectors for the KU65 plus a waterproof 9-pin connector at the motor end.

 

[KirstinS]

The Q100H comes with the wire all the way to the controller with the correct connectors for the KU65 plus a waterproof 9-pin connector at the motor end.

Ah it comes with a cherry on top

Good news