By brandycmc - Mon Apr 17, 2017 8:16 am
- Mon Apr 17, 2017 8:16 am
#145280
First up - A huge thank you to everyone who has written up their experience and learning from modding their BPRO over the last decade! In 6 months of picking up this addiction, I've gone from newbie ignoramus to semi-competent modder, thanks to you all!
I'd really appreciate your advice on how to wire up my 4WD jeep. I've read lots of views here about which way to go:
I got the basic 4WD up and running quite easily. But it's time to upgrade the stock motors and what remains of the stock wiring, so I'm going to do it properly. But I've realised that I don't understand the pro's and con's of each configuration option. I'd really appreciate it if someone could explain that to me, so I can make the right choice for my situation!
Thanks folks.
--------------
Some background info, in case that helps:
Just to get it all working and to prove the concept, I just soldered diagonally opposite motors together in parallel and ran the gear shifter in the 'slow' series position. My ESC is 24V, so each motor saw roughly 12V each. Once that worked, hooked them all up in parallel (option 3 above) and dialed down the max throttle position on the ESC, to give 18V to each motor at full throttle.
My current thinking is that I should keep the motors all in parallel, because as soon as I put any 2 motors in series I'll be limited to 12V maximum at the motor. And I'd like the flexibility to go to 18V at the motor (I have a couple of 12V Mabuchi 550s in my Dune Racer, over-volted to 18V, which goes quite nicely
; and a couple of pairs of 18V Mabuchi 775s waiting in the spares box for me to make up some spacers
)
I'd really appreciate your advice on how to wire up my 4WD jeep. I've read lots of views here about which way to go:
- 1) On each side, wire front and back motors in series, and then the sides in parallel*
2) Wire diagonally opposite motors in series, and then each diagonal pair in parallel*
3) Or just run all 4 in parallel

I got the basic 4WD up and running quite easily. But it's time to upgrade the stock motors and what remains of the stock wiring, so I'm going to do it properly. But I've realised that I don't understand the pro's and con's of each configuration option. I'd really appreciate it if someone could explain that to me, so I can make the right choice for my situation!
Thanks folks.
--------------
Some background info, in case that helps:
- - Original vehicle: A fairly standard Hummer Jeep, RWD, 2x 35W 10,000rpm motors. Non-PW branded.
- I have added 2 similar motors and gearboxes (the kind you get off eBay - with a teardrop-like shape similar the the PW #3) to the front axles.
- I have the luxury of a decent speed controller from the guys at 4QD - 24V 100A. Currently dialed down to give 18V max to the motors.
- Motors are currently wired all in parallel.
Just to get it all working and to prove the concept, I just soldered diagonally opposite motors together in parallel and ran the gear shifter in the 'slow' series position. My ESC is 24V, so each motor saw roughly 12V each. Once that worked, hooked them all up in parallel (option 3 above) and dialed down the max throttle position on the ESC, to give 18V to each motor at full throttle.
My current thinking is that I should keep the motors all in parallel, because as soon as I put any 2 motors in series I'll be limited to 12V maximum at the motor. And I'd like the flexibility to go to 18V at the motor (I have a couple of 12V Mabuchi 550s in my Dune Racer, over-volted to 18V, which goes quite nicely

