I ran dual motors like that as an experiment about 8 years ago. It was two of those 250W razor scooter motors. Rich people buy them for their kids and when the batteries shit the bed you see them out in the garbage. I ran two at 36V in parallel and they overheated. In series they ran ok on the flat.
Since 500W is good for 20 to 22 mph gearing and 1000W for about 28 mph gearing my gear ratio is perfect for that set up. Like I said it will run flawlessly. In fact two motors at 500W each have more surface area for heat dissipation than a single 1000W motor.
Since I have been running a 36V 1,000W chain at 43V with a 26 amp controller for about a year now with no issues I know it will work. My current gearing is.
It could even be an 11T sprocket. Not sure. I do know that the power output is 43V * 26 amp = 1,118.
Not absolutely sure though as It could be a 28 amp controller. It is a Chinese controller rated at 800W 36V. I am running 13S LIFEPO4.
On flat ground I beat a 50cc gas bike in the 1/8 mile and a 350W Bafang hub motor. Around here there are no steep hills Only slight inclines of moderate hills and it has no problem climbing them.. I will have to check but the bike is my daily commuter so not easy to count teeth for motor and wheel sprocket with the chain on.
I know it is fun to drive and keeps accelerating. I do not have a phone but believe it will do about 28 mph on the flat if I were to guess. If I were to travel to upstate NY or where there are steep hills I would take my 20" bike with the 1,800W brushless motor.
I think it is geared for 35 mph with a 60T wheel and 11T motor sprocket. I think the gearing for both ebikes are about the same but the brushless motor pulls harder as more low end torque. I have clocked it at 32.5 mph flat ground with a GPS speedometer app. I have not measured the 1,000W brush motor as my cell phone was stolen.
My 10S LTO pack is still balancing. Should be finished by tomorrow some time. I will then hook the 28V charger back up and probably balance again. It should be ready in a couple days.
The first test drive will be my full suspension with dual 30 amp controllers. A 1,500W rear hub with a 1,000W brush chain on the front. 55V of LTO.
I already tested the rear hub and clocked at 33.5 mph but never even hooked up the front chain. It has a custom modified chain tensioner. If the chain pops off I might take the motor off and put it on the front of the 20" bike with the 1,800W brushless motor on the back.
The only point in a 24V build is the fact that most of the time I just need a simple cargo bike to haul beer and groceries and not really caring about top speed and no steep hells to worry about. If I get the 10S LTO pack going I wont even need a 24V bike right now as can run one of my 6S LTO packs with the 10S for 40V and just run one of my 36V ebikes. I have three.
1, - The 1,000W 36V brush 20"
2, The 26" Diamondback Outlook with dual 350W Bafangs
3. The 700C Giant Cypress Hybrid with the 26 Currie wheel pedal chain and 750W gear reduction motor with a 350W Bafang up front. It sports a single thumb throttle like the dual Bafangs on the Diamondback.
just wanted a 24V 1,000W set up for short distance and a single battery for less weight and easier charging.
Thanks.
Skyler out.