9xl, 5s, Quark 125b + Lipo battery holders?

I have to admit that I too am guilty of quoting specs and numbers. I've often used 30K rpms as a "sweet spot" to shoot for and adhere to that more closely with the Feigao motors. The fact of the matter is that there are variables that will also play a substantial role in the amount of success that you have with a particular setup.

The two most substantial variables to consider will be the type of terrain that you will be running on that the ambient temperature of the area of the world that you are in.

Although the better Neu motors are more forgiving of these considerations, the Feigaos are not.

I'm in southern Louisiana and it's always hot down here. I think that winter lasted all of two days last year. LOL.

Anyway, the 9XL might perform well for you and the temps might not get too bad if it is relatively cool where you are.

Down here where I am, a 9XL does fairly well on 4S, but will jump up to 200*F on 5S pretty quickly. Although I run Neu motors in almost all of my vehicles, I still run a MM/Feigao combo in my Monster GT conversion. Running the 9XL on 4S makes for plenty of power and loads of fun.

In my experience with the Compro controllers, they run cool no matter what you put them through. If you can run 6S, you could look to an 11XL or 12XL.

If you are new to brushless, you may just not know what to expect. Here's a link to a video of my 8ight T running a 9XL on 4S geared 14/46...http://s154.photobucket.com/albums/s...DSCF0303-1.flv

It is, of course, not stupid powerful, but still much more powerful than a nitro setup.

[jhautz]

I gotta pee too...

[MTBikerTim]

Originally Posted by jhautz

I gotta pee too...

I was wondering what you on about. That 8T is pretty quick. If I got that sort of performance out of my savage and the electrics stayed cool I'd be happy. The 350Z in the background is quick too I bet.

The temp here vary from about 5-15c (41-59f) in middle of winter to around 25-40c (77-104f) in summer. I have used BrianG's speed calculator and I may try an 11xl. It will be mainly off road work that the savage will do. Dirt and grass. It is going to probably be a basher so I still want heaps of torque. Here is what i put in:

Vehicle Weight (approx): 15 (I assume this is in pounds, I have no idea what my truck weighs)
Desired top speed in MPH: 40
Differential Ratio: 3.3076923076923075
Transmission Ratio: 1.6956521739130435
Additional Ratio: 0.967741935483871
Spur Tooth Count: 47
Pinion Tooth Count: 16
Battery Voltage: 22.2
Tire Diameter (inches): 6
Total Ratio: 15.94407 : 1
Tire Circumference: 18.85 inches (478.779 mm)
Required Motor RPM: 35729.102 RPM
Required Motor KV: 1609.419 RPM/V
Good Motor Choices: BK Wanderer 12 XL (kv=1390) BK Wanderer 11 XL (kv=1516) BK Wanderer 10 XL (kv=1668)
Better Motor Choices: No motors of this class fit the parameters you entered.
Best Motor Choices: Neu 1515 2.5d (kv=1700) Neu 1515 1.5y (kv=1500) Neu 1512 3d (kv=1700) Neu 1512 2y (kv=1400) LMT 1940/10 (kv=1588) LMT 1940/9 (kv=1742) LMT 1950/9 (kv=1452) LMT 1950/8 (kv=1634)

I'd love to get a neu motor in the future but for the momment I'm going to stick to feiago's. If I try to get a neu now this truck will never be finished. I have almost enough parts to build the chassis now, so pics should be coming soon. Just waiting on a couple of bits.