What dual motors are best?
- Thread starter MrYetiMan
- Start date
sl33py
10 kW
wow - you could try to find two motors that are more different... 
speed i see as two things - torque (off the line acceleration) and top speed.
It will *always* depend on your gearing. Find the youtube video of the guy that goes 55 or 60mph on an e-board.
you are comparing a 50mm vs 63mm to start and a 270kv vs 190kv - all else being equal (which it isn't). So equally geared with the same voltage to both - the 270kv motor will have a higher top speed. But likely the 63mm R-Spec will start and accelerate faster.
How about we determine what you are trying to do - besides "speed"?
How heavy are you? What board do you have (motor clearance may be an issue)? Use - hills or flats? What's your top speed goal? It's all doable in the gearing, but just depends on how much you are willing to sacrifice at the bottom end when starting.
I personally have tried to keep my motors at lower kv - 200/190 and trying out a 149 SK3. The best quality feel i've found has been the R-Spec, but also recommend you check out the Tacon bigfood which is supposed to be excellent (if you can find one they're also almost 1/2 the price of an R-Spec).
Edit - almost forgot - do you want Dual Rear or Dual Diagonal motors? DR vs DD - lots of debate, but the biggest issue is usually motor length. Your 5065 motor is difficult to run DR since it's 65mm long/wide. I did run DR 5065, but had to use Paris 195 trucks with two 5mm spacers. I had it geared for a top speed of 25mph, hit 30mph once with a tailwind. (all in the gearing - do you have a gearing calculator yet? give me some of your specs - Wheels (size), # Battery S (6/8/10s), Motor gear (#t), Wheel gear (#t) and i can show you the top speed pretty close to real life).
HTH - GL!
speed i see as two things - torque (off the line acceleration) and top speed.
It will *always* depend on your gearing. Find the youtube video of the guy that goes 55 or 60mph on an e-board.
you are comparing a 50mm vs 63mm to start and a 270kv vs 190kv - all else being equal (which it isn't). So equally geared with the same voltage to both - the 270kv motor will have a higher top speed. But likely the 63mm R-Spec will start and accelerate faster.
How about we determine what you are trying to do - besides "speed"?
How heavy are you? What board do you have (motor clearance may be an issue)? Use - hills or flats? What's your top speed goal? It's all doable in the gearing, but just depends on how much you are willing to sacrifice at the bottom end when starting.
I personally have tried to keep my motors at lower kv - 200/190 and trying out a 149 SK3. The best quality feel i've found has been the R-Spec, but also recommend you check out the Tacon bigfood which is supposed to be excellent (if you can find one they're also almost 1/2 the price of an R-Spec).
Edit - almost forgot - do you want Dual Rear or Dual Diagonal motors? DR vs DD - lots of debate, but the biggest issue is usually motor length. Your 5065 motor is difficult to run DR since it's 65mm long/wide. I did run DR 5065, but had to use Paris 195 trucks with two 5mm spacers. I had it geared for a top speed of 25mph, hit 30mph once with a tailwind. (all in the gearing - do you have a gearing calculator yet? give me some of your specs - Wheels (size), # Battery S (6/8/10s), Motor gear (#t), Wheel gear (#t) and i can show you the top speed pretty close to real life).
HTH - GL!
torqueboards
1 MW
Other then that 270KV will be higher top end speed (with the same gearing) versus 190KV but with less torque.
sl33py
10 kW
kv is simply the revolutions per volt.
Watt is a result of Amps x Volts.
Your voltage is relatively constant depending on your # Series batteries. 6/8/10/12s - each x3.7 will give you nominal voltage. each time 4.2 will give you voltage when full. Fortunately (not for your Watt question) - higher voltage is more efficient and less amps are needed. My peak amps on dual 5065 on 8s was around 65A max, with measured watts of just shy of 2k (watt meter inline from batteries to motors). (8s/33.6v x 65A = 2184 watts) I probably didn't really accelerate until the pack was partially discharged.
I still think you are focusing on Speed, watts, and kv... where you should be focusing on use case and how heavy you are to gear it correctly. Give us some info and we'll help you!
Watt is a result of Amps x Volts.
Your voltage is relatively constant depending on your # Series batteries. 6/8/10/12s - each x3.7 will give you nominal voltage. each time 4.2 will give you voltage when full. Fortunately (not for your Watt question) - higher voltage is more efficient and less amps are needed. My peak amps on dual 5065 on 8s was around 65A max, with measured watts of just shy of 2k (watt meter inline from batteries to motors). (8s/33.6v x 65A = 2184 watts) I probably didn't really accelerate until the pack was partially discharged.
I still think you are focusing on Speed, watts, and kv... where you should be focusing on use case and how heavy you are to gear it correctly. Give us some info and we'll help you!
torqueboards
1 MW
A 50mm or 63mm motor between 190KV to 300KV is ideal IMO.
Thanks for information sl33py & torqueboards .
I am starting to understand it abit better my overall goal is too make some mods on a prebuilt eboard iv orderd because it worked out a little cheaper then buying everything seperate i got the bench wheel board eboard already built with gears motors esc bms battery gears but the motors i don't know if they are good enough yet i want some torqy goodness in the videos it doesnt look so torqy and one other guy on the forums said its abit slow for him so thought i might just order the parts in as i deffo want too change things a little,
I am starting to understand it abit better my overall goal is too make some mods on a prebuilt eboard iv orderd because it worked out a little cheaper then buying everything seperate i got the bench wheel board eboard already built with gears motors esc bms battery gears but the motors i don't know if they are good enough yet i want some torqy goodness in the videos it doesnt look so torqy and one other guy on the forums said its abit slow for him so thought i might just order the parts in as i deffo want too change things a little,
sl33py
10 kW
Gotcha - that makes more sense.
So you have the dual motor benchwheel? I'm not sure you are going to have any luck modifying that board. Not sure if any larger motors will fit, and you likely would need to reinvent the mount if the larger motor bolts don't line up (and they won't - they built it for those motors and not a flexible mount for multiple motors).
For more power your options normally would be:
increase voltage (6s upgrade to 8s or 10s or 12s), but you are restricted by the ESC's limit (again it's likely maxed w/ existing battery voltage)
Swap motors - won't fit on mount.
For more starting speed off the line or hills you could change gears, but from what i saw those are not the "standard" 5m belts, so your normal gears you can find in the DIY shops likely won't work. beltingonline.com can make custom gears, but they are $$$.
Honestly you are better keeping it as is, or selling it to build one DIY. Onloop's quote in his signature applies - false economies.
GL!
Edit - checked the likely battery pack is this one = 6s. So i'm pretty sure you can't upgrade to 8s or higher. Most hobby ESC's max out at 6s. >6s ESC's get $$$ quick. Unless you upgrade the battery and ESC - but then your BMS likely is useless. you now have a gutted skateboard with more power and manual charging. and a bench of unused electronics. It will cost more than building it once DIY. my .02
So you have the dual motor benchwheel? I'm not sure you are going to have any luck modifying that board. Not sure if any larger motors will fit, and you likely would need to reinvent the mount if the larger motor bolts don't line up (and they won't - they built it for those motors and not a flexible mount for multiple motors).
For more power your options normally would be:
increase voltage (6s upgrade to 8s or 10s or 12s), but you are restricted by the ESC's limit (again it's likely maxed w/ existing battery voltage)
Swap motors - won't fit on mount.
For more starting speed off the line or hills you could change gears, but from what i saw those are not the "standard" 5m belts, so your normal gears you can find in the DIY shops likely won't work. beltingonline.com can make custom gears, but they are $$$.
Honestly you are better keeping it as is, or selling it to build one DIY. Onloop's quote in his signature applies - false economies.
GL!
Edit - checked the likely battery pack is this one = 6s. So i'm pretty sure you can't upgrade to 8s or higher. Most hobby ESC's max out at 6s. >6s ESC's get $$$ quick. Unless you upgrade the battery and ESC - but then your BMS likely is useless. you now have a gutted skateboard with more power and manual charging. and a bench of unused electronics. It will cost more than building it once DIY. my .02
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