12xl or 13xl

[xxxrems38xxx]

hi guys,
12xl or 13xl for the fastech? i've got no idea for a new motor! i want a motor more stronger than stock motor for run in 4s

[Diesel6401]

12xl on 4s is only approx 21,000 rpm and a 13xl is only around 19,800 rpm that's not alot of rpm. If you wanna run 4s try more like a 8xl or even a 9xl. Or set the motor timing on your fastech to high and run 5s stock.

[forescott]

I'd go with Diesel's suggestion of the 9xl. Although You're stock proboat motor is a strong proven motor with a 4-pole design that creates more torque than a comparable feigao. I like the 5s suggestion!

[Diesel6401]

I'd go with Diesel's suggestion of the 9xl. Although You're stock proboat motor is a strong proven motor with a 4-pole design that creates more torque than a comparable feigao. I like the 5s suggestion!

I think its a 6 pole and strong/prove is dead on. Run 5s on it

[xxxrems38xxx]

I think its a 6 pole and strong/prove is dead on. Run 5s on it

ok but yet when i see video of similar boat of my fastech, for example the sv 27 with a motor 2300kv and 4s lipo i've got the impression it's more faster!

[Diesel6401]

ok but yet when i see video of similar boat of my fastech, for example the sv 27 with a motor 2300kv and 4s lipo i've got the impression it's more faster!

It prob is faster. 2300kv on 4s is 34,040 rpm(2300kv x 14.8v)

Your stock fastech is only 1500 or so kv on 4s thats only 22,200rpm. Your lacking rpm. Target range for rpm should be 28k-35k or soo. Your coming up short. Drop a 5s system in it and run 27,750rpm with the right prop it should scoot right along nicely. I would save my money and run 5s if I was you. I have a BJ same motor and if I don't sell it im running 5s on stock system screw paying for a motor. The motors you picked will not run very well 4s. If you want to run 4s your going to need to go with a higher kv. something in the 1800 to 2200kv range

Rpm = "kv" x voltage

[xxxrems38xxx]

It prob is faster. 2300kv on 4s is 34,040 rpm(2300kv x 14.8v)

Your stock fastech is only 1500 or so kv on 4s thats only 22,200rpm. Your lacking rpm. Target range for rpm should be 28k-35k or soo. Your coming up short. Drop a 5s system in it and run 27,750rpm with the right prop it should scoot right along nicely. I would save my money and run 5s if I was you. I have a BJ same motor and if I don't sell it im running 5s on stock system screw paying for a motor. The motors you picked will not run very well 4s. If you want to run 4s your going to need to go with a higher kv. something in the 1800 to 2200kv range

Rpm = "kv" x voltage

yeeaaahh thanks very much for advice Diesel!!! I couldn 't understand this history has kv voltage and you're my favorite teacher! of course I want to stay in 4s which motor you advice me?

[Diesel6401]

yeeaaahh thanks very much for advice Diesel!!! I couldn 't understand this history has kv voltage and you're my favorite teacher! of course I want to stay in 4s which motor you advice me?

If im your favorite teacher your in deep ! lol

Depends on your price range really. If you want the more cost affordable route a fegiao 8xl or 9xl as listed before would suite you and maybe a octura x642 prop. I would lay-up and prob say a 9xl maybe better suited. I think I read somewhere that the proboat 1500kv motors are actually under-rated and are more like 1600kv or something like that. It's in the proboat section some where. Your gonna need a new speed controller with as well, your current which is 45amp I think, is not going to work. A seaking 120amp should work nicely.

http://www.kintecracing.com/Electrical.html
http://www.offshoreelectrics.com/pro...-540XL&cat=116

If you want a more expensive set up
http://www.offshoreelectrics.com/pro...series&cat=134
http://www.offshoreelectrics.com/pro...d=cas-hydra240 or a seaking 180 found on kintecs page.

May I ask why you want to stay in the 4s range? Just curious. Happy boating...




I found what I was talking about.

Nope... the BJ motor tests around 1625-1650 actual KV. The SV27 around 1525-1550KV... I haven't tested this new one for actual KV, but it's a new wind, and should be 1800KV or more. I'll try to setup my test bench again one of these days to get the actual numbers... It's definitely a new motor wind. I had them annodize it and the ESC a different color so they'd be easier to differentiate.


electric - The internal dimensions of the battery tray (Width and Height) are 2 3/8" and 2 3/8". There is right at 1" between the bottom of the tray and the bottom of the ESC platform as well. A 2S pack or a 6-cell NiMH pack will slide up under there...

[xxxrems38xxx]

If im your favorite teacher your in deep ! lol

Depends on your price range really. If you want the more cost affordable route a fegiao 8xl or 9xl as listed before would suite you and maybe a octura x642 prop. I would lay-up and prob say a 9xl maybe better suited. I think I read somewhere that the proboat 1500kv motors are actually under-rated and are more like 1600kv or something like that. It's in the proboat section some where. Your gonna need a new speed controller with as well, your current which is 45amp I think, is not going to work. A seaking 120amp should work nicely.

http://www.kintecracing.com/Electrical.html
http://www.offshoreelectrics.com/pro...-540XL&cat=116

If you want a more expensive set up
http://www.offshoreelectrics.com/pro...series&cat=134
http://www.offshoreelectrics.com/pro...d=cas-hydra240 or a seaking 180 found on kintecs page.

May I ask why you want to stay in the 4s range? Just curious. Happy boating...




I found what I was talking about.

ok thank you very much teacher!!! i want to stay in 4s because i 've got five lipo turnigy 5000mah 4s!!!!

[xxxrems38xxx]

oh!! I had forgotten the ammo 2300kv is it good for my boat?

[Diesel6401]

ok thank you very much teacher!!! i want to stay in 4s because i 've got five lipo turnigy 5000mah 4s!!!!

It may be cheaper to buy some 2s and 3s packs then you can run 4s,5s or 6s for cheaper then buying esc/motor. Just an option.

oh!! I had forgotten the ammo 2300kv is it good for my boat?

It's an option. Im not a huge fan of that motor, but it will work on your boat plus it will work with your esc you already have. Need to run a smaller prop though, something in the 38mm - 40mm range that motor needs to wind out.

[xxxrems38xxx]

It may be cheaper to buy some 2s and 3s packs then you can run 4s,5s or 6s for cheaper then buying esc/motor. Just an option.



It's an option. Im not a huge fan of that motor, but it will work on your boat plus it will work with your esc you already have. Need to run a smaller prop though, something in the 38mm - 40mm range that motor needs to wind out.

ok my cousin got this motor i will try it with a grimracer 40/3 blades!

[xxxrems38xxx]

first test this morning with the motor 2300kv ammo in 4s and grimracer 40 / 3 blades, that is just excellent! more speed and stability! of course at the end of the run the flex shaft is turning in thin air in the collet!! (sorry I used the translator on google! ) someone had a solution to fix my flexshaft? thanks

[forescott]

The flex shaft is broken, or it came loose??

[Diesel6401]

I wonder if the brass insert inside the collet got put in backwards when he changed motors. I've done the before lol

[xxxrems38xxx]

The flex shaft is broken, or it came loose??

it is still attached to the motor but it runs into space and the prop stops turning