snail run

I got a HPI RS4 sitting without an engine and i'm thinking about putting my brushless system on it but keeping the original gearbox wit it. I'm not so sure if it has been done before, will there be any problems with that type of conversion?

rc_square24

iTrader: (9)

If you can custom mount your motor and have a custom made pinion gear adapter for 2-spd gas pinions, shouldn't be a problem. The rest is just to figure where to mount the battery.

snail run

i have most of the fabricating part figured out getting brakes is my problem. thats the only thing i cant come up with

old-man

iTrader: (11)

Just retain the throttle servo for the brakes, having said that all car ESC has brakes. So you might as well ditch the throttle servo and rely on the brakes provided by the ESC.

snail run

the gear box is set like a one-way dif

pakk

iTrader: (80)

Ditch the 2 speed. Many have tried and it just doesn't seem to work. Brushless motors have the torque that nitro motors lack.

old-man

iTrader: (11)

You are right. the 2-speed is like a one-way. Suggestion from pakk seems better idea.

snail run

seem to not work in what way?

rc_square24

iTrader: (9)

Ahh, missed the brakes.

Can you somehow pair the throttle servo with the esc channel so both work together. Like how some 1/5 scales use 2 servos for steering?

snail run

that crossed my mind but i wasn't sure it would work.might try making a "Y" connector now

rc_square24

iTrader: (9)

You should be able to mix it in your radio, or is it a 2channel system?

gpm-parts.com

If your radio do not have a 3rd ch mixing. Just use a y-connector. connect both brake servo and ESC to ch 2. Set reverse according to the brake servo direction, then set the ESC. Will work perfectly. Been doing it for sometime with my 1/5 electric bike (need a servo to pull the front brake) before I get the 4pk which have 3rd ch mixing.

Dragonfire

iTrader: (1)

Reread this post. All brushless conversions I have seen have been converted to single speed. This is because 2 speed is not necessary with the performance of a brushless motor. Get rid of the one way parts and use the ESC to brake.

pakk

iTrader: (80)

isn't that what I said?

snail run

so your trying to tell me it would not work better?