6 Cell Mod...7.2V [Archive]

Bad Company

11-06-2003, 09:56 PM

OK, I broke down and did it anyway...without regard to any damage that might occur. I have only tested this in the kitchen cuz it's raining outside. From the drag race tests I have done, all I can say there is a big difference. The tests were done with bone stock cars, and fresh batteries in both (even switched the batteries to one another.). The 6 cell far out accelerated the 4 cell. I hope to do some extensive testing tomorrow outside. I want to get a durabilty test to see if the electronics can withstand it. I have let the car sit here powered up for 30 minutes now with no signs of overheating, etc.

If all goes well, I WILL find a way to fit these in the body!

JesterDotcom

11-06-2003, 10:11 PM

cool

dEmOnRaCeR

11-07-2003, 12:08 AM

can u take a pic of the where the wires r going cause i want to try to do this

FLMX647

11-07-2003, 01:12 AM

when u figure it out please post a step by step

Bad Company

11-07-2003, 05:58 AM

I just cut the wire running from the negative on the left side over to the positive on the right side. (black wire on the bottom) I then ran the negative from the left to the positive on the new pack, and then ran the negative from the new pack to the positive on the right side.

Like this, the body will not fit on, but after I confirm the car will take long extensive use like this, I will mod it so the body fits.

catman25

11-07-2003, 06:33 AM

I have done this big whup...jopking ofcorse i have done this and i found a key to making the body fit.cut the lighting system posts and move the lighting system to any one screw thats out of the way..If you use a hair dryer you can manipulate the shape of the body with out effecting th paint and its not very noticable..I have the supra .probly the tightest fitting one and that resulted in just making a scoop on the winshield.,seeing how its bLACK ITS not noticeable.I heated the body up past hand burnong point(wore gloves)and you have feel it bending easy i put the body back on while still hot and press down hard..this formed room for the holder.then just leave it there till cool and walla.The plastic of the batt holder wont melt as easily as the body,and its not reaLLY Melting the body just making it more pliable.There is no running of paint or creases.Dont have a cam just my experiances

neurokinetik

11-07-2003, 08:41 AM

Originally posted by Bad Company
OK, I broke down and did it anyway...without regard to any damage that might occur.

If all goes well, I WILL find a way to fit these in the body!

When you have so many spare cars, what's to worry if you blow one up? :lol:

Just get a Mini Cooper body and it'll fit fine... :p

TypeZer0

11-07-2003, 02:16 PM

did you try 5 cells first or did you jump straight to 6 cell?

catman25

11-07-2003, 02:26 PM

5 rechargables equal same volts as 4 alkalines..so no went straight to 6 cells.

4G63T

11-07-2003, 03:53 PM

wow looks great i heard that the electronics can handle it well see:cool:

dEmOnRaCeR

11-07-2003, 06:21 PM

I hope the results r good i hope it doesnt like crash and burn cause rite when results come out im gonna do this 4 sure :D

catman25

11-07-2003, 06:46 PM

Ive been running a week at 7.2 and no probs yet

Bad Company

11-07-2003, 06:48 PM

I went straight to the 6 cell, for the reason mentioned above, the 5 cell NiMH only gives the power of 4 alkalines.

TypeZer0

11-07-2003, 07:09 PM

it may match the voltage of 4 alkalines but nimh and nicd can dump out more current than alkalines, that's why 4 nimh is already faster than 4 alk's

catman25

11-07-2003, 08:21 PM

you have a point there..but over all nicads push the most ..but dont carry the constant volts for as long..

Bad Company

11-08-2003, 12:54 AM

Here it is with everything installed.

Here is how I did it...

http://www.tinyrc.com/forums/showthread.php?s=&threadid=14792

Morphes

11-08-2003, 01:43 AM

well my 2 cents for adding a body would be to hook up sum of those hearing aid batteries (size and weight) to the top and then make a jumper so u dont have to use them all the time, due to not being rechargeable and all.... or u could get sum more of those zip zap batteries (since u kno how much volts it can take now so try differnt types of batteries to see if you can get size down with a rechargeable battery... thats what i would do if i had a job to pay for this if i broke it, LOL

10_second_supra

11-08-2003, 06:20 PM

how did you get that clip thing like that also could you make a step by step tutorial

Bad Company

11-08-2003, 06:28 PM

The clip came from the motor and chassis clip from another chassis which is being used for parts. You can use sta-cons too, which are sorta like quick connects you can get at RS. I will do a tutorial when I do one for the AWD car.

CommanderMcBrid

11-09-2003, 05:41 AM

My question is, when is someone gonna try a pair of 9v batteries? :D

Aww, yeah, 18v of power...

*car goes really fast for about 1 sec, than explodes in a hiuge fireball*

FESCSteve

11-09-2003, 10:37 AM

For what it's worth, I gave a pair of lithium polymer cells a shot last night and all I can say is WOW! 8.4V fresh off a charge, 7.2 nominal and lighter than 4 AAA cells. THe stock electronics seemed to take it in stride although I can't be too sure that I am loosing some power due to overloading the thing (= heat).

I removed the stock battery holders and used double sided foam tape to hold one on each side of the chassis. The body fits too.

I should warn you though that if you discharge these batteries below 3V per cell they will be ruined. So I have to work on a cutoff circuit.

These things are cool, but don't tell the owner (my son) I said so.

cmuench

11-11-2003, 10:58 AM

I got mine to fit like a champ in my supra body. I am going to take some pics and start a thread when I get home tonight

ghost_duster

11-11-2003, 04:00 PM

Originally posted by Bad Company
Here it is with everything installed.

Here is how I did it...

http://www.tinyrc.com/forums/showthread.php?s=&threadid=14792

Where did ou get the quick connect for the removable bracket?b24awgm

cmuench

11-11-2003, 04:14 PM

I did mine kind of cheap. I had a old motherboard with fan. I pulled the fan header off the board and cut the wire off the fan. Whala.. a quick disconnect. If you dont have spare parts lying around I would check Radio shack or a hardware store. They would definetly have something to make one

Bad Company

11-11-2003, 04:22 PM

My quick connect came from a spare chassis and a stock motor, but you should be able to find something else if you look at any electronics store.

Hudson5150

11-12-2003, 04:25 AM

I used this plug. It works great.

http://www.wsdeans.com/products/plugs/micro_plug.html

cmuench

11-12-2003, 12:05 PM

I spaced my batteries out a little more

YeLLoW GT-R R34

11-12-2003, 08:16 PM

Hey BC......How are you liking the Stage 10 Motor?

Bad Company

11-12-2003, 08:56 PM

Originally posted by YeLLoW GT-R R34
Hey BC......How are you liking the Stage 10 Motor?
I don't have one yet...and at the price he is asking, I might not get one. This thing goes fast enough for me......for now. Besides, I need to save my money for Emaxx hop ups.....now those are expensive!

dEmOnRaCeR

11-12-2003, 08:59 PM

hey bc do u have a micro rs4 do u or anybody recommend themand a place to buy them.

Jakillo

11-12-2003, 10:39 PM

So is the supra the best body to use in order to fit 6 cells? And also can I Sodder the wires together?

Viper966

11-12-2003, 11:37 PM

Originally posted by Jakillo
So is the supra the best body to use in order to fit 6 cells? And also can I Sodder the wires together? i fit 6 under my gtr

YeLLoW GT-R R34

11-13-2003, 06:08 PM

Opps my bad BC........I meant Cmuench

Bad Company

11-13-2003, 09:44 PM

FYI:
You can use the battery holder from the chassis, and it will fit on top of the chassis and you can put the Civic body on without any modification to the body or chassis. If you don't have a spare chassis to rob the battery holder from, you can order a replacement one from RS.

Micro S2000

11-13-2003, 10:01 PM

is there any chance it will fit under a skyline with little no modification?

Bad Company

11-13-2003, 10:12 PM

Originally posted by Micro S2000
is there any chance it will fit under a skyline with little no modification?
Yep, just tried it. Slapped the body on and snapped the tab lock without any problems. No bushings needed or no need to shave anything on the body.

Bad Company

11-13-2003, 10:16 PM

Here is a pic of where I mount it. This is without a heat sink on the motor, but there is a gap between the motor and the bottom of the battery holder the sam as the height of the heat sink.

Viper966

11-13-2003, 10:17 PM

part # for replacement battery holder?

Bad Company

11-13-2003, 10:20 PM

Originally posted by Viper966
part # for replacement battery holder?
Left Side: 12414298
Right Side: 12414306

Check CJ's FAQ for more numbers...

EDIT: I forgot, you do have to remove two little tabs on the bottom of the battery holder, but no biggie at all.

cmuench

11-14-2003, 08:11 AM

Hey Bad Company,

I got a bit of a problem. When i install my 6 cell mod it flies. When ever I install my 6 cell mod and logic lights it fries the antenna internals and the range gets shot. Im on my 3rd car now cause I can never find why this is occuring. Just to make sure i was not shorting out everything, I replaced my quick disconnect with the quick disconnect that is used on the motor. I also tested the final output with a voltameter and evreything is in range. I got a new car but i am hesitent on weather I should re-install it or not. Please help me BC

4G63T

11-14-2003, 11:51 AM

well if it happened on 2 cars already don't install the lights
my 02. cents

cmuench

11-14-2003, 12:40 PM

The thing is that other have gotten it to work fine with the upped current and lights. I just want to find out how this was done

4G63T

11-14-2003, 02:48 PM

o ok i see well good luck

Bad Company

11-14-2003, 04:12 PM

I haven't tried to hook up the lights on mine, after hearing about this problem. I would say just leave them off untill we can figure out what is wrong. I'm not much of an electronics whiz, so I may not be too much help, but I'm sure someone here will get to the bottom of it.

If we could only get a wiring diagram?

Jamezracer

11-15-2003, 12:45 PM

.For what it's worth, I gave a pair of lithium polymer cells a shot last night and all I can say is WOW!

Hey FESCSteve

where did you find your lithium polymer cells, I've been looking for weeks to get some.

FESCSteve

11-15-2003, 04:49 PM

Jamez,

The cells I used are both 1200mah E-Tech and a 230mah cell I am testing out that is not on teh market yet.

The 1200's are just barely too large to fit under the RSX body in place of the stock AAA cell holders. However the 230 cells fit in the top of the body with room to spare.

I also have some 340 Kokam SHC cells which are a bit larger than the 230 cells but will fit on the sides of the chassis.

Get the 340s at:

http://www.b-p-p.com

2 in series will make this car cook. just be aware that you should run a stage 1 motor with a heatsink if you are goign to run it all out for more than a couple of minutes. THe stage 2 motor gets pretty warm at this voltage and I doubt it puts out any more power to the wheels due to effeciency losses.

Also know that the cells will be ruined if they are discharged much below 3V per cell (6v for a pair in series) so you ar eon your own there. They also take a specialized charger to charge and take an hour or more to charge.

Just some of the drawbacks, but they simply can't be beat comapred to lithium-metal, nimh or nicad cells.

Jamezracer

11-15-2003, 06:55 PM

thanks a ton, great site, I'll be sure to get some soon.

Xmodracer

11-15-2003, 10:44 PM

hey bc i was wondering if on your car the top will still go on after you added those extra batterties

cmuench

11-18-2003, 08:14 AM

hey YeLLoW GT-R R34. i didnt see you post about the 10 motor, my bad. I finished putting the 11 tooth and soddering a connector to it last night (had to sacrific a stage 2 motor :( ). The motor is wild, Its almost like a turbo car. You start with lag but when it starts to move it just flies. I had my Stock bumper on my car and nailed a wall, let just say the bumper is unuseable now. Anyways the major drawback if the power consumption, the thing eats threw batteries.
Now for the big news!!
The 6-cell mod and the logic lights will fry your antenna board. Thanks to some information from Pinoy274 it seems it fries the antenna wires on the internal board. theres a way to bypass this by soldering in a new receiver module but im waiting for him to reply back to me on how to do that one. Tonight I am going to try the 6 cell (w/o lights) with my stage 10 and hope for the best. If i blow my stage 10 im going to give up on it.

blaze9whs

11-20-2003, 08:59 AM

put 8 alks in my xmod and it worked great bu after a while it slowed down to a crawl what hapened??

8x1.5=12v!
:confused:

cmuench

11-20-2003, 09:12 AM

Yeah if you put them in series you would achieve 12v. the highest we've seen a x-mod run is 9v. You may of fried it.

blaze9whs

11-20-2003, 09:19 AM

is there ne way i can get another pcb board if i did fry it with my fu*king 12v mod:mad:

cmuench

11-20-2003, 09:25 AM

Well.. you can either
1. turn it back to stock and return it
2. you will have to wait till after Dec 31th, then you will be able to order individual parts threw RS.

TypeZer0

11-20-2003, 09:46 AM

Originally posted by blaze9whs
is there ne way i can get another pcb board if i did fry it with my *CENSORED*12v mod:mad:

please don't use profanity, this is a family forum

YeLLoW GT-R R34

12-21-2003, 01:06 PM

When you did this, which way was the car facing you?

charliebrown

12-21-2003, 02:33 PM

Um, you don't have to rip a battery case off an Xmod, or order a spare one...

http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&category%5Fname=CTLG%5F011%5F002%5F001%5F000&product%5Fid=270%2D398

http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&category%5Fname=CTLG%5F011%5F002%5F001%5F000&product%5Fid=270%2D414

Muahahah I enjoy shaming you Bad Company :D

Chuckster...

Bad Company

12-21-2003, 03:04 PM

Originally posted by charliebrown
Um, you don't have to rip a battery case off an Xmod, or order a spare one...

http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&category%5Fname=CTLG%5F011%5F002%5F001%5F000&product%5Fid=270%2D398

http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&category%5Fname=CTLG%5F011%5F002%5F001%5F000&product%5Fid=270%2D414

Muahahah I enjoy shaming you Bad Company :D

Chuckster...
At the time I did this mod, RS didn't have the battery holders, or list them for that sake.

And as far as trying to shame me, that is a game you will not win.