Do I really NEED to know why? I'm satisfied knowing that it just is.

OK, if you know why, I'd appreciate an explanation.

Actually I don't - that's why I asked you. :)

The only thing I can figure is that a Y config will pull less current than a D of the same turn count, and less current means less currrent losses, which means greater efficiency. I was hoping you had a little more info on it. :)

That could change!

I had those same thoughts...........

I chose a 1515/2.5d/f because its big, similar in kv to a 9XL and with the heat coming, It needs a heatsink

Brian, what can I say, you are expecting too much from me.

Now, getting serious, from what I remember, you hit the nail on the head. I do plan on doing some reading up on electric motors so that I can get a better grasp of what's going on inside of them. I'm just afraid that if I learn too much, I might start thinking that I can make a Nue better than it is.

Neu...better....? :005:

J/K

Brian, do you know if a 1515/2.5D will power a truck with about equal power as a 8XL? if geared properly. I really would like to get one, I am just trying to get one that will be good on ~16.5, and wicked on 18.5v at a later time.

I'm seriously thinking about getting a 1512 motor for my next project.

you need to see A4DTM's LSP, it has too much power and looks fun. Its on 5s

zpb, are you really asking that question? LOL

The although I don't have a 1515, the 2.5d should at least equal to power of the 8XL, give or take a couple hunderd kv. I've heard nothing but good things about the 2.5d. Just going by kv values and my experiences with brushless in general, I'd go with the 2.5d just to have the flexibility of 4S or 5S lipo. I think the 1Y is too hot for extended running on 5S. If 4S (or its equivalent) is what you are sticking with and performance is on your mind, yo could opt for the 1Y, which I would think is on par with 7XL performance.

Is the 8XL what you are running now?

:005: I'm just not sure sometimes, after all, I don't have a Neu.

Yeah, I have nothing but good of the 2.5d as well, but same with the 1Y. I definitely want to move up to ~5s equivalent. I would prefer something like 6s, but I will see if I can make the Quark work properly at that voltage, it is beyond me why it shouldn't or can't? :032: That's with a 1515/3D on 6s, I would have Mike special order it. I don't know yet, I might just upgrade my batts and motor at the same time so I can run 6s.

I personally think the 1512 will surpass an 8XL performance-wise and heat-wise. Even if there is a couple hundred kv difference, you can always gear up to compensate (to a point of course).

Yeah? I was thinking either a 1515/2.5d, or a 1512/2Y, both nearly identical Kv. If I see a good deal somewhere on a Neu, I won't pass it up (2.5D, or 2Y)

That is of course, if I can get the Quark to run at ~6s. Once I get my Quark case machined, with a high voltage Neu, there is one powerful, and very cool setup.

Most people that I have heard of running the Quark on 6S say that it is quirky on a fully charged 6S pack, but after picking it up off of the ground and running it for a minute, it's OK. Perhaps the 6S A123 rig will work without problems. If I had the cells laying around, I think I'd have to try it.

Alternatively, if you have a charger with a programmable cc/cv threshold, you could try setting it to something like 4v/cell...

What exactly does it do? I wonder if the extra cap bank will help at all? Just a thought.

I do yes, remember my BK PRECISION PS? I can do any charging profile, up to 20 volts, and 10A.

If I WERE to get LiPo's, I would only get TrakPower's, as they have a rep of being very good quality (balanced, and don't fire under normal use). But I am kinda waiting for Altair Nano to release to market cells for sale, currently they only sell them as the battery modules. They look very promising.