Haien said:
I will mostly ride to and from the city, which is about a 6 mile ride each way on a bicycle path with barely any cyclists on at all (typically I'd meet about 1 cyclist when I used to cycle that path) and an old road with almost no cars or bikes (typically would not meet a single car). In the city I will go bicycle speeds, no more than 20mph. I am not planning to go motorcycle speeds even close to all the time, as that would kill my range and be overall dumb. The reason I want so much power is simply to have stupid high torque and acceleration up to like 30mph, which I will get with 200A and a qs 205 4t. I already have an 1kw bike that goes 30mph, the speed is ok, ideally I would want to go maybe 37 (60kmh), but the acceleration is underwhelming.
Some of you might not understand this, but the qusetion I am essentially asking this forum is how I should go about building my 16kw bike, not if I should build my 16kw bike.
Well, since this is an open forum, you are going to get all sorts of answers, and they may not be ones you like!
16kw is about 20hp, which means it's got more power than a 250cc dirt bike. Those will hit 80mph and have the torque to climb incredibly steep hills - and they have the frame to handle the power. "Stupid high torque" a 16kW motor will have, but that will also mean it will dump you if your hand slips. (It's happened to me.) You will end up with a big, heavy, expensive, inefficient bike that doesn't do its primary job (getting you to the city) well.
Get a 2kW motor with a temp sensor and run it at 3-4kW in a DH frame. That will give you all the torque you could want and will easily hit 30mph. And if you accidentally floor it, it won't break the frame, dump you or break spokes. And it will be reasonably efficient, so your battery pack can be smaller (i.e. more stealthy) and easier to manage. The bike will weigh less, be more nimble, and look far more "bike like."
Or get a 16kW motor and put it in that $200 frame you posted at the beginning. Get a huge battery. Make a battery backpack with a big cable leading to the controller that you imagine people won't notice. Bend the dropouts way out to get the hub in. Then when it's all set up, floor it. It will be a learning experience for you, and you'll end up knowing a lot more about ebikes.