Brushless Revo?

[PAULIE]

I am converting a revo into a brushless. I lightened the chassis and made battery holders and installeds an E Maxx tranny. My problem is that I have some esc's and motors and I am unsure if they are adiquate for this set up.

I have:
Modeltech esc(emaxx setup-3+years old)
Modeltech motor(emaxx setup-3+years old)
BK 7018 esc
Lehner Basic 5300 motor

Is any of this worth using. I plan on running 12 to 14 cells(3300)

[Serum]

Welcome to this forum Paulie!

What KV value has the modeltech got?

the 7018 is good for the job, unless you get a motor that's not too hot. (such as a 1800kv wanderer L-can) The basic is too hot for this application.

[PAULIE]

I don't know the kv on the modeltech. And there is no info available at their website. I don't think they do BL anymore

[Serum]

Okay, that's not too easy then. what type is it? how long is it? how many cells can you run thru that esc?

[PAULIE]

The motor is the sive of an hv-maxx motor from novak. It has an 1/8 inch shaft and bolts right in. I is much longer than the 5300.
I have run 12 cells through the esc with some heat but nothing extrordinary. That esc doesn't like breaking, breaking causes it to heat up quick.

The motor is purple like a hacker

[Serum]

Perhaps you can use that on your revo? can it handle 14 cells? then you could try a 4S lipo setup. (which is light) meaning less stress on the controller when braking.

[PAULIE]

Can my 7018 handle 4S lipo setup. I know very little about them.

[Serum]

Yes, it can.

it can handle up to 20 cells (at 1.2V per cell), while a lipo is 3.7V per cell.

You need to keep a close eye on the lipo's though. They may not be discharged under 3V per cell. The 7018 hasn't got a so called low voltage cutoff (LVC) so you need a separate one, which is easy to install.

the 12L would be a nice motor. Why an L over an XL.. weight.. Pure to keep it lighter. an L rotor is easier to spin up than a larger XL rotor (more mass) the L will spin up pretty quick and will jump from it's place. (don't get me wrong, an XL is pretty impressive too) i used to drive my 7XL on 3S lipo. (S means serial, while P means parallel) It was fun for bashing.

Somehow the smaller rotors seem to spin up faster and feel more peppy..

[squeeforever]

Yes, but the smaller motors seem to heat up a good big and don't like alot of weight...

[Serum]

with a lower kv, and 4S lipo it still be a relative large motor.

[Serum]

Yeah, Paulie;
the 7018's are relabled to 7020, after BK discovered they could take 20 cells with ease. It might have looked a bit odd when i posted the 20 cells story..

[PAULIE]

I appreciate the help. I think I will see if I can find a better motor and run the 7018 and see how that works for now. Thanks for the help every one....

[Serum]

Not a problem Paulie. If you ever need any help, feel free to ask.. Got any pictures of your lightened Revo?

yeh any pics i want to see the bettery trays?

[PAULIE]

I'll take some pics and post them.