fat sand bike conversion

[rmasu]

Hi, I hope someone can give me some advice.
I finished my gng 450 mid dirve on a giant fs and love it! I miss riding on the soft sands here though. I am thinking of starting another project on my current fat bike. Its a fat sand bike e monster with a 500w fun8 motor. Fatsandbikes.com.
The front mounted 500w motor is ok, but pretty anemic in the hills. I was doing some research on high torque hub motors but was still unclear of which gives the best torque. I'd probably like to keep the stock batttery 36v 9amp li-ion that came stock with the bike. Changing controller would be fine if necessary.
My questions are
Am I barking up the wrong tree? Will no hub motor give me the torque like my gng? I dont mind upping voltage etc if need be.
Do the crystalyte and magic pie etc hub motors fit on the front or rear dropouts of a fatbike?
My current fork is steel, should I keep the motor on the front or move it to back? (safety concern), Moving to back will mean losing my nexus 8 IGH, which I really like.
Thank you.

 

[BarkMau]

If u like the way the hub works in the front, keep it there. It's a lot simpler and you get to keep the IGH. In order to get more power, you'll need a different controller and more battery. 36v 9ahr is not gonna cut it. Only thing I don't like about that course of action is the way that particular fork flexes, and with increased power...idk... How about you throw a cromotor in back and save the Nexus for a different project?

 

[dogman dan]

To ride slow in deep sand, you need a very slow winding and more power. It won't have the torque of the GNG, but better than what you have now.

Mac 12t, 9 continent 2812, that sort of extremely slow winding.

Or, something huge and high powered enough to just ride 30 mph, even in deep sand.

 

[chas58]

Well, a "high torque" motor is not going to have much more torque than the same motor in a high speed wind. It just changes the speed where it operates at its best efficiency without overheating. Generally your torque is going to come from high amperage, so look for a motor/controller that can give you the current you need.

 

[Drunkskunk]

Am I barking up the wrong tree? Will no hub motor give me the torque like my gng?

Yes, wrong tree. you'll need a mid drive to make torque like another mid drive, or else build a super over powerfull hub bike and dump huge amps through it.

 

[rmasu]

Thanks for the suggestions,
Now my bottle battery that came stock with the fatsandbike when dead.
I'm going to try and get a new hub motor and controller.
Thanks!