There seems to be conflicting info coming from CC. When the MM was first out Shawn was recomending the Neu. Now it depends on who at CC you talk to... some don't seem to know there is an issue, and others act like it's common knowledge.

It seems to me that the recomendation of hte Neu is based on how good the motors are, without actual experience running them in cars.

I'm sure the Neus are great in the planes... but remember the car thing is relatively new to CC... they are still what I would call plane guys.

Edti:
But, they are slowly coming around... and the Mambas are becoming a larger % of their business every day. A couple years back they were 100% planes... now it's more of an even split. If they play their cards right, the company could be car dominated in the future.

OK, I have to quit thinking about this for a while. I'm changing my mind like my wife does. We finished my buddy's buggy tonight. Well just about. We got the battery tray figured out and we're hoping that his MM and 8XL show up tomorrow. After running the 8XL, I'll see if that's the route that I want to take, speed wise.

I was getting ready to pull the trigger on the Lehner, but then I remembered the 4mm shaft.

I may just order the Neu and just live with what I get. If it cogs too badly, I'll just put it aside and wait for Castle to do what they have been promising to do. I'm still liking the 1515/1Y, and that's only because it's the only motor they offer that is in the ballpark kv that I want to be in.

Oh, I don't know if I got the answer to this, but will the RC Monster sink fit the Neu smooth can motor? Does it even need a heat sink? If I get the finned model, will I need a fan? I'm just asking because, if I need a fan, I'd just as soon use the RCM heatsink that I've already attached a fan to.

no, it will not fit, the smooth nue is ~39mm while the heatsink/clamp is made for the "normal" 35.8mm motors.

One other thing to consider is that batteries also seem to make a difference in the cogging with the MM/Neu combo. I have an older Kokam 4s 3200 mah pack that seems to make the system cog a lot more than newer Lipo packs that are coming out now.

The MM is a great little system but, I think I'm with jhautz, I like the Quark for the 1/8 scale stuff right now. That may change though. Hopefully sooner rather than later if CC can do a programming fix.

Let's see if I can change my decision again. Here's the question:

If the MM runs great on a 4 cell, can you get enough power from a larger mah 4 cell and run it with a Lehner 1950 on a truggy? Rather than having to go 5 cell. I know the 4 is great for a buggy, but since the truggy is bigger I wasn't sure.

What do you guys think?:eek:

you only need 30~35 mph in truggies so you should be good with 4cells.

Ah, the key word there is "need". I know I only "need" 30-35 mph, but I would like 40-45 mph to be attainable . . . with the right gearing.:005:

So . . . does a larger mah give me that option?

i see, you want it to be fast.
i dont know then.

Voltage is the key. Check out Brian G's Top Speed Calculator. There is no variable for battery Mah rating.

also you can use the motor selector, very helpfull.

Well, the higher the mAh rating of a cell is, at the same given discharge C, the higher the power is the cells can provide.

4S should be enough for 45 mph. use good cells though, if you go maxxamps, go for a 2P setup.

5S will give you a higher voltage (logically) and at a higher voltage, the setup becomes more efficient. you can use 4S of 4000's or 5S of 3200's to get about the same runtime. Hope this makes sense.

Good point. This would be assuming you are running at the same speed (i.e. what you are limited to by the track)?:032:

Yes. the same speed is a given. sorry for not mentioning it.

It simple takes an amount of energy to drive at a certain speed.

I did not factor in mAh because it really does not "directly" affect speed (more on this later); it affects runtime more than anything. And an actual runtime calculation is all but impossible because of the multitude of other factors (drive style, ambient temperature, terrain, wind resistance, drive train resistance, etc).

Now, a low mAh battery can affect top speed indirectly. A low Ah cell usually can't provide a given current without dropping more voltage than a higher Ah/C rated battery can. Example: If you have a 3Ah battery, it's voltage will tend to droop more when drawing, say, 100A. A 10Ah battery will usually have an easier time providing 100A with less voltage droop since the C rate won't be as high. This voltage droop can affect top speed since less voltage is available to the motor/ESC.

This is why I have the ability to select different voltages per cell. You can approximate the droop and then calculate the speed based on that value.

Nice info guys. Thanks.

Well, I think I might be back to the MM/Lehner now, and go with a larger 4 cell pack and just make sure it's a nice cell. Like a Trakpower or something.

For the ~120 bucks they cost in the states, you can't go wrong with the hard cased trakpowers!

Yeah, that's true. Is the 4900mah going to be enough though? I wonder if I should look at something like an Enerland closer to 6000mah.

Maybe this one:

http://cgi.ebay.com/Enerland-Lipoly-...QQcmdZViewItem

Although I guess that's only an extra 100mah over the Trakpower. Wow, I feel smart.

Trakpower uses a special grade of enerland cells. they are not 'just' enerland cells.

and since two trackpowers are cheaper, the answer is obvious.. :p

Right. I was actually thinking of doing that - putting two of them together would make it a 4 cell 4900. I was looking at a couple of the other 2 cell Enerlands too. Not as tempting as the two Trakpowers. What do you thik Serum - are the two Trakpowers, the Lehner 1950/7 hi-amp, and MM esc going to give me a great system that will stay cool?

I don't know if this means anything, but I just tried to program my MM and when I started the app, it told me that a firmware upgrade was available. Is this the fix?

I wish it was...

Nope, the update is a fix for the lipo cell count..

Yeah, the setup you have in mind will be awesome!!

That's funny, because I've never had a problem with my MM detecting the cells. In fact, I wasn't even aware of this issue. We just happened to finish my friends 8ight tonight. We got the MM in from Mike today. Plugged everything up, jacked in a 4S pack and it only beeped twice. I wasn't happy, after what he had been through dealing with Finedesign. I decided to try the flash with the new firmware and all is well.

I suppose we should just keep twidling our thumbs, or perhaps just go out and buy a Quark. I really wanna get that Neu. For some odd reason, I just don't find the Lehner as appealing.

Trust me, once you have a lehner motor in your hands, it's sweeter than sweet. Besides its ugly sticker and ditto purple end bell, it's simple a precision produced tool..

I'm just curious - what about the Lehner don't you like? Other than what Serum mentioned about their disco packaging. They should put a few rinestones around it or something and just go all out.

The Lehner that I was interested in was the 1940/7, but it has a 4mm shaft. If I got with a Lehner, it might have to be a 1950, just because of the shaft diameter.

What's wrong with the 4mm shaft? Is it pinion availability? If so, RC-Monster has 4mm pinions.

mike can make you an adapter so any 5mm pinion will fit the 4mm shaft. I have one he made. It works great. Used it to figure out the gearing I want with my 5mm pinions. Then ordered the correct 4mm pinion. But you could just use the adapter permanently if you wanted to.