How do I wire my EVX to run on 18 cells?

[RUSTY XL-5]

Well after reading this thread:

http://monster.traxxas.com/showthread.php?t=405138


I want to run my E-Revo on 18 cells (I have the waterproof EVX). :D Only problem is I dont have the extra $$ to buy some new packs, but I do have a bunch of 6 cell packs.

So I was wondering, what wire contraptoin do I need to create to plug in 3 6 cell packs (GP 4300's) into my esc? I have pleanty of deans plugs and extra wire I just need to be told what to do!


Thanks!

[t-maxxracer32]

build a series connector so you will have one 12 cell pack and one 6 cell.

then you connect those 2 like regular batteries and there you have it.




18 cells.

[RUSTY XL-5]

Originally Posted by t-maxxracer32

build a series connector so you will have one 12 cell pack and one 6 cell.

then you connect those 2 like regular batteries and there you have it.




18 cells.

How do I build a series connector? And would 14.4 volts going into one side and only 7.2 on the other fry the esc? or does it need to be evenly split?


Thanks!

[RUSTY XL-5]

I just made a series adapter...I followed this pic:

http://www.rc-monster.com/forum/atta...6&d=1202856340


Now I just need to know if it is ok that 2/3 of the voltage goes into one side of the esc while 1/3 of the voltage goes into the other? Do I need to plug the BEC side in first with the 6 cell pack or do I not worry how I plug them in?

I really dont want to fry my esc by doing it wrong!


Thanks!

[_paralyzed_]

it doesn't need to be equal voltage per side. a series connection is like a flashlight- positive to negative to positive to negative, so, to make a series connector you need two male plugs (to batteries) and one female (to esc). The female plug will have the positive from one battery going to the positive side from the connector AND the negative from the other battery going to the negative side of the connector. So, you have half a series connector now, positive from one male to positive of female and negative of other male to negative of female. Now all you do is put in a jumper wire from open negative of male to open positive of male, connecting the two male plugs. sorry, without illustrations this could be confusing.................................

[_paralyzed_]

woops, i chimed in late, glad you built one!

[RUSTY XL-5]

Originally Posted by _paralyzed_

woops, i chimed in late, glad you built one!

In fact, I just tested it...everything runs fine! I'm shocked that the new esc can handle 18 cells (21.6 volts)....I just wish my parts would hurry up from RPM (broke 2 suspension arms) so I can actually drive it.

[_paralyzed_]

with that much voltage it would be cool to see a bigger motor, some kershaw designs 650's maybe? I ran dual 970's with dual evx's on 16.8 volts, it was a BEAST, but kershaw motors like the higher voltage is my point, all of which is kids play compared to brushless, but fun never the less

[RUSTY XL-5]

I just did this to see if it would work. Running 18 cells will just be a time to time occurance because I want my motors to last a while.


Now all I need in a feiago 8xl and mamba esc.!

[_paralyzed_]

titan motors are cheap, burn 'em up! actually, they take abuse well, I think they'll handle the power fine, heck, they're waterproof

[RUSTY XL-5]

Originally Posted by _paralyzed_

titan motors are cheap, burn 'em up! actually, they take abuse well, I think they'll handle the power fine, heck, they're waterproof

I actually dont have the extra $$ to afford new titans...but I do have some old Johnsons laying around! Now I'll run those to the ground.

[suicideneil]

Have you read GriffinRU's how-to? I dont think its quite as simple as hooking up 18 cells and expecting it not to go into meltdown....

http://www.rc-monster.com/forum/show...5&postcount=19

[RUSTY XL-5]

Originally Posted by suicideneil

Have you read GriffinRU's how-to? I dont think its quite as simple as hooking up 18 cells and expecting it not to go into meltdown....

http://www.rc-monster.com/forum/show...5&postcount=19

Thats with the old EVX, the newer ones are a different story. Read the link I posted in the first post. :)

[suicideneil]

Yeah, I saw that, but Im still slightly concerned. Certain components may only have a 25v rating, and pumping in 18 freshly charged Nimhs could have certain undesired effects...