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View Full Version : BJ26 ESC on 6S?



ReddyWatts
07-18-2008, 08:18 PM
I read that a BJ26 stock ESC/motor can handle 6S without BEC........???

Has anyone run theirs on 6S successfully?

Which prop?

Jeff Wohlt
07-19-2008, 01:00 AM
No...that is WITH bec.

Steven Vaccaro
07-19-2008, 06:37 AM
WOW REALLY? Who did it? I have a couple of those going in my old twin outboard Titan 40. Now you have me more intrigued.

RCprince
07-19-2008, 08:14 AM
When I first had my BJ I ran it on 6s my cousin let me try out one of his packs that's when I did 51 plus before it blew over, everything was stock, with the exception of the 645 prop.

ReddyWatts
07-19-2008, 08:30 AM
6s with BEC

My Gosh.................... that makes it more incredible!

They really over built this ESC.

This info is tempting me to put 6s in a Miss Budweiser with the BJ motor/esc combo with BEC.

For the new guys:
BEC (Some ESC's have a built in "Battery Eliminater Circuit", to power the receiver on the middle red wire going to the receiver.

Disconnect this wire for (without BEC) if you want to use an external battery to power the receiver or you may also purchase an external BEC to power it.

Teerayoot
07-23-2008, 11:50 AM
Just burnt for me already with 6S lipo,
i replace with SV27 ESC also burnt :(,
so i ordered HV120 version ,will try soon .

RCprince
07-23-2008, 12:09 PM
What motor was you using and what size prop

Teerayoot
07-23-2008, 12:13 PM
Both all stock part,or just too much battery C ratting,
I'm using 30C ratting serial with 25C 2 pack of 11.1V lipo.

Anyway do this (burnt ESC ) is warranty void?,if not i will taking a claim.

RCprince
07-23-2008, 12:15 PM
well with 6s it's void...max voltage they recommend is 21

RCprince
07-23-2008, 12:18 PM
5s is Ideal...I've read a few post where you can get 50 plus out of 5s and stock set up

Teerayoot
07-23-2008, 12:25 PM
Thank for so far reply.
I have some question,
How much stock motor can handle for Voltage and AMP,
because of i plan to using 6S lipo stock motor with

Castle Creations Hydra High Voltage 120
http://www.offshoreelectrics.com/proddetail.php?prod=cas-hydra120-highvolt

Don't sure it can hanle so much voltage,so much cost alredy pay for .
If speed isn't satisfied i also plan to using 12S lipo(2 22.2 lipo pack) :)

Hope motor can accept it ,wanna to get some break record ^^.

RCprince
07-23-2008, 12:54 PM
Well if the BJBL motor is truly a HIMAX motor it says they can run up to 40,000 rpm max, not sure if that a bearing limitation but 40,000 rpm is over kill anyway, 30-35k is ideal..I think 6s is the most you'd wanna put on that motor anyway, with a 640 and down prop. 12s on that Motor...you'd fry it completely...the wires are to thin to handle that kind of amperes and voltage...

crazzy maxx
07-23-2008, 01:06 PM
i just ordered 4s1p max amp lipos 2 of them should run nice right?( i ordered them for my mhz flash ) figured ide try them in my bj

birdy233
07-24-2008, 09:16 AM
5s is Ideal...I've read a few post where you can get 50 plus out of 5s and stock set up

Quick question,

I have a pair of 5000mah 2S1P's that I normally run in my BJ26. I also have a 3S1P 5000mah pack, could I run one 2S1P and the 3S1P for a total of 5S1P? Will this work out ok? That would put total voltage at 18.5


Thanks!

RCprince
07-24-2008, 02:13 PM
It should work, the amps are the same voltage will be the only increase

Steven Vaccaro
07-24-2008, 03:43 PM
As voltage increase, so does amperage. IE a 700 motor with 12 cells may pull about 30 or so amps. On 16 cells with the same exact setup the amperage will go to about 40. I don't know the exact reason why but have witnessed and logged it. I'm sure one of the smarter engineer types could tell us why.

RCprince
07-24-2008, 05:09 PM
Steve he wasn't asking about load , he was asking if it was ok to place in series a 2s and 3s with the same mah.

ReddyWatts
07-24-2008, 05:10 PM
IMO, you can mix different cell voltage battery packs in series, if they are the same brand, Mah rating, C rating, style and model etc................. The problem comes when the packs have a different internal cell resistance (ohms). This will cause one pack to get hotter than the other and poof!

krusty
07-25-2008, 11:38 AM
I tried 6s 6000mah with x642 prop and nuked my motor it was only running 40.1 mph according to the gps way to much prop :frusty:

RCprince
07-25-2008, 01:47 PM
Just came in from the lake out back, with my sv..running a cheap 60amp esc and the BJ motor with 3s2s or 6s 2200 25c i think...and a modified x440 prop i got 48.2 on my gps

RCprince
07-25-2008, 05:01 PM
I got 49.0 mph with a grimracer 45x68...I think I'll work on the 440 or move to a 640..I noticed the bigger the prop the more it comes out of the water.