Comment, criticize my build. But be nice I’m new!

[Hummina Shadeeba]

I bought 2 more 36v batteries to put in parallel for the current draw. Still looking into either a 2 stage gearing deal or if I wanna go with the 114t rear sprocket with a free spinning sprocket to add chain wrap to the 9t

I don’t see what peak BATTERY current it will do in my searching of that controller and important to know as the cells can put out 11amps peak

2 stage.. how?

 

[Hummina Shadeeba]

Long as the gearing is correct or at the minimum in the correct range then these high RPM motors with matching controllers should run like a scalded dog!

I don’t know what u mean by gearing being correct or at the minimum in correct range. If with gearing the max unloaded speed is like 60 and in use it’s only riding around the city barely hitting 30.. it’s going to have like half the torque of what it could.

Could compensate for that with a lot of current from the controller. What battery and motor current limits it has I can’t see

 

[BiggKidd]

I don’t know what u mean by gearing being correct or at the minimum in correct range. If with gearing the max unloaded speed is like 60 and it’s only riding around the city at max 30.. it’s going to be a lot weaker than it could be. .. like half the torque.

Gearing is "correct" when the motor or engine tops out at the required or optimum speed. Granted I am using a vastly different motor and everything I've built in my past used engines but they topped out at the required speed or slightly above.

 

[Hummina Shadeeba]

Yea. his and maybe ur bike are geared for a much higher speed than needed.

 

[BiggKidd]

Yea. his and maybe ur bike are geared for a much higher speed than needed.

That would depend on the end goal. I can't and won't try and speak for anyone else. Speaking for myself I have built a lot of stuff from a 79Z28 that ran 10 second quarter mile times at 6500RPM but I could and did occasionally turn it up and run 9's and even 8's once. I also built a dump truck that would barely run 80mph but it had no trouble at all getting a full load up to 75mph quick fast and in a hurry. Both of these examples had the gearing correct for the desired end use which is what I am planning for my build. Now I aim to see what kind of quarter mile time I can achieve from a homebrew E-bike build. I also want to see how many miles I can run this same bike at legal speeds riding place to place.

 

[Drubieg]

I don’t know what u mean by gearing being correct or at the minimum in correct range. If with gearing the max unloaded speed is like 60 and in use it’s only riding around the city barely hitting 30.. it’s going to have like half the torque of what it could.

Could compensate for that with a lot of current from the controller. What battery and motor current limits it has I can’t see

My controller is 200Amp max output. But it’s pretuned with battery output being 33% of those 200amps

 

[BiggKidd]

Yea. his and maybe ur bike are geared for a much higher speed than needed.

The bike I'm building will ride around on the street at about 10% power but race days should be a blast! I haven't got everything figured out yet but the performance should be akin to a new sports/muscle car.