Brushless Cen Genesis

[Hardstyle]

Hello!
Im quite new user here and im from Finland, so sorry for my bad english :027:

Im converting cen genesis to brushless and im buying a new motor to it. I have already bk 20xl06x motor and 12020 controller, and I think the motor will be too hot.. So what kind of motor would be perfect?

Some specs:

• Weight about 9 Kg containing lipos, motor and esc..
• Center diff locked
• Stock gears (pinion 17 and 21 tooth) and its 3 speed

If someone could show me the light I would be very happy :027:

[crazyjr]

Closest i could come for info for you is a GST 7.7 which should be nearly identical http://rc-monster.com/forum/showthread.php?t=4495, and welcome to the forums

[Sylvester]

What lipos are they? A neu or lehner are the top notch motors out there.

[jhautz]

9kg is a heavy truck.:dft002: I would say that you want the Lehner 1950 for sure. The Neu 1515 would be an option but your BK12020 controller will not run a Neu 4 pole motor.

Couple questions. How many cells are your lipos? What is the capacity and C rating of them. For something that heavy I would say you want as much voltage as possible. You should consider running 6s (22.2V)Lipo if you can. On 6s lipo the 1950/9 would be a nice choice. Plenty of torque to get that big beast moving. :027:

I'd love to see some pictures of you truck if you can post some.

[crazyjr]

Aquwt has a 2280 on his

[Hardstyle]

Originally Posted by crazyjr

Closest i could come for info for you is a GST 7.7 which should be nearly identical http://rc-monster.com/forum/showthread.php?t=4495, and welcome to the forums

Yes I saw aqwuts conversion its pretty crazy :005: . But the thing is that I dont have so much money for lehner + controller. Finedesign has the same conversion even with smaller controller, how is that possible and they say it runs even better than stock genesis..
I started this project about half year ago and I just want to get that dam thing to move soon :027:


Right now I have two 11,1 V 4200 (12 C) robbe lipos, so pretty bad lipos.
I try to get some photos soon..

[Serum]

Welcome Hardstyle! i think it would be wise to get a lower KV motor. it would work with the one you have though, but you need to gear it tall, (same goes for the lipo´s) it will work, but you need to gear it for a low speed.. the motor still is hot though.

If you can swing it get a lower KV motor. (on 6S a 9XL or even a lower KV would be nice) perhaps the Robbe lipo´s are numbered with caution and maybe they can push out more.

The XL motors can pull that sled, no worries.

[Hardstyle]

Ok! I have ordered 9xl but there are some difficulties in bk-electronic so I can still change the order to lower kv, would 10xl be better or maybe even lower?

Im thinking of buying new maxamps lipos, but im not sure can I use my old charger to charge them? My charger is robbe lipomat 5-4000 and it charge lipos by using voltage sensor socket.

[Serum]

What speed are you looking at? Sorry for the late reply.

[Hardstyle]

I know with that motor I cant get any crazy speeds but, something around 50 to 60km/h. So if it could go a bit faster than the nitro version, I would be happy :027:
What motor/lipo set would be good. Im thinking that I buy them from here, would that be wise? And second thing about the charger, can I use it to maxamps lipos?

[Serum]

What i would do to toss that sled around;

warrior 12020
6S2P maxamps 8000mAh cells
10XL/11XL

that would be good for nice runtime/power.

[Hardstyle]

Ok thanks!
I look into it, just in case I try 11XL...

[Serum]

12XL would work as well. Longer runtime.. you made a wise choice in not trying to make it a 50mph truck...

[Hardstyle]

Heheh, Maybe in future :005:

[Serum]

If you get good batteries, you might succeed in doing so with a higher KV motor.