Check out MaxAmps, and e-mail them with the sizes you want. They were able to supply me, until I realised that a LiPo in a 12th car was never going to work due to weight and motor problems. Good luck with it. HTH :)

one of the guys at our track who's particularly fond of lipos tried an unusual experiment in his genX this week that yielded really good results. He put a novak mongoose brushless system in his genX (this is the little brushless combo that's designed for 1/18th scale cars). to power this motor, he used an inexpensive 2cell 7.4V lipo from maxamps (which just happens to be about the same length as a 4cell NIMH pack is wide). It all fits just fine in the genX car and to our amazement, the car handled much like it did with a normal power package. His lap times were actually a tick quicker than what he was doing the previous week with the same car and a 13.5 normal brushless. And this was done with the mildest of the the available mongoose motors. The car was easily able to run for 8 minutes. So it would seem that it is in fact possible to make a lipo setup work in 12th with products that are currently available. Oh.....I forgot to mention that the car's something like 350 grams lighter than it was with a GTB speedo and a 13.5 motor. those of us who witnessed this experiment were amazed to see that it worked so well. But I've seen it with my own eyes and even driven the car for a few laps. It had good power and it drove much like my regular genX.

Does anyone have a suggested rollout for 1/12th with 7.4v lipo for the following motors.

13.5 & 17.5

Yeah I expect to hear some backlash:nod:, not concerned about weight as I will be adding lead to compensate.

Just not to sure on rollout with the voltage increase.

I guess my biggest concern with LiPo (as available at this moment) is that hard cases are unavailable. I wouldn't worry so much outdoors, but indoors on our club's VERY expensive to replace carpet I'm concerned about well-intentioned experiments going wrong. Beyond the fire potential, does anyone know what the "juice" from one of these batteries would do to Ozite? There are a TON of things in a 1/12 chassis that can poke through a soft lipo in a hard wreck.

All that said, I am VERY interested in the results you are seeing.

Interesting and brings up a couple of ?'s. I have'nt seen this system did he need some kind of adapter plate to mount the motor? And what size pinion does this motor use?

Chris

A guy came to my track with the same thing but with a Mamba system. He used a copper tube with the ID the size of the shaft and the OD the size of a 540 motor shaft to run the pinions. I think he soldered the tube to the motor shaft but I can't remember.

the little novak motor has a 1/8 shaft and so it uses standard pinions

Not to say one COULDN'T solder directly to the motor shaft, but that would pretty well render that motor non-serviceable should it need internal attention in the future. I'd bet he used the old slot car trick for putting 1/8" bore wheels on 3/32" axles. Make a sleeve of 3/32" id (conveniently 1/8" od) but before you cut the sleeve off the big piece of tubing you bought use a Dremel and cut-off wheel to cut a hole in one side of it near the end that a grub screw (set screw) can pass through. Put your wheel (or, in this case, pinion) over the end of your piece of stock and run the grub screw down so it engages through the tubing sleeve. Cut the sleeve to length on both sides using the pinion itself as a guide for your X-acto razor saw or Dremel/cut-off wheel. Use a round jewlers file to dress the ends, back the set screw out JUST far enough that the assembly slips over the shaft (but leave enough in that it keeps the sleeve "indexed" to the pinion...easier to keep everything lined up that way) and tighten the grub screw. Viola!!


Isn't that great news!! Is the Novak Munchkin Motor (or whatever they call it) sensored or sensorless?

What sort of adapter are these guys using to mount the motor into the chassis?

Guys, you can really forget about wanting to use LiPO cells in 12th scale... 1S LiPO is 3.7V & 2S LiPO is 7.4V and since we are running 4 cells NiMH which are 4.8V nominal, using LiPO is definately out of the question and besides that... A 2S LiPO saddle pack of 7.4V will never fit a 4 cell 12th chassis because they are sized for 6 cell saddle pack chassis...

Joost.

Will fit in several cars BMI, CRC Gen X etc.

I am doing it as a test mule as I tire of nimh cells that are unreliable and so time consuming to maintain at there peak.

Charge a Lipo days before put in car, drive. When I practice this is what I want to do, come race day I use nimh:flaming: torch batteries

It has allready been done in several tests. Not all that long ago 1/12th used to run 6 cell saddle packs so there is room...it just gets really crowded.

The idea of using a 2 cell lipo with a smaller 380 motor sounds interesting. I might give that a try this winter.

That is all nice but all major races are still raced with 4 cell batteries so in my opinion testing and trying with LiPO cells is pretty useless in a 12th scale. I know that 12th scale used to run with 6 cells but then again, back in the the days we ran 10th scale off road with 7cells!!!. Then it went back to 6 cells and now 5 so that is not an argument...

12th scale is running on 4 cells and that is not compatible with any LiPO, same thing in 10th scale TC 5cell. There is no LiPO that compares to that. So until the industry brings out a good alternative we just have to stick to the regulated cells.

Off coarse, for training & recreational purposes you can do whatever you want...

Joost.

Joost--I don't necessarily disagree with you, for racing NOW 4-cell NiMH is the only option.

My interest in LiPo and smaller brushless systems is to start experimenting toward a new spec for 1/12...to see what lies on the other side of the mountain. I strongly believe that sooner or later sub-C batteries won't be as readily available as they have been. The problem is that if no one has started trying things out and gotten a good idea of what can and can't work that we'll be backed into a corner and have to accept poorly thought-out alternatives and do so on an accelerated time frame.

Who knows...if 2s LiPo w/ low kv brushless works pretty well maybe it can be added somewhere along the line as a spec in parallel with the existing specs. Then the market can decide what it prefers.

I agree with both of you but here is why I would like to try it.

There is not much 1/12th around here anymore. Everyone runs TC. I like to run a little 1/12th on a budget over the winter to keep my driving sharp for summer nitro racing. That usually means buying new batteries every winter in the hopes of getting to race competitively but it never happens and now my nice new batteries I spent all that money on only get used for three or four practice days.

If all I can do is practice anyway, why not try out something different with a battery that hopefully will still be good after sitting all summer long.