Brushless performance specs list

[NickRummy]

Made this for another site and thought I would share it here.

First we'll do a little calculating and part listing.

Transmission gears - Final Ratio = 2.727

2388x - 60T Ring Gear
3696 - 30T Idler Gear
3195 - 22T Drive Gear

Spur and pinion Combos

1918 - 18T Pinion (stock)
2423 - 23T Pinion (Optional included)
4686 - 86T Spur (stock)
4683 - 83T Spur (optional)
4690 - 90T Spur (optional)
Robinson Racing 20T
Robinson Racing 16T
Robinson Racing 14T


Wheels - Outer Diameter = 4.37"

5873 - Stock Wheel set

Using the Dark Horse RC Calculator I plugged in numbers and here is what I got for numerous setups using %75 efficiency for the motor. I’m not sure what the temps would be so I’m guessing on pinion choices to motor setups based on what I’ve read about what other people have tried. Basically gearing down the higher KV motors so they are comparable to each other in speed.

Traxxas Velineon VXLs Speed control and 3500kv motor

18/86 gearing – 6S 4200mah NIMH - 18.9mph
20/86 gearing – 6S 4200mah NIMH - 21.0mph
18/86 gearing – 2S 3200mah Lipo – 20.4mph
20/86 gearing – 2S 3200mah Lipo – 22.7mph
16/86 gearing – 3S 3200mah Lipo – 27.2mph
18/86 gearing – 3S 3200mah Lipo – 30.7mph
20/86 gearing – 3S 3200mah Lipo – 34.1mph
22/86 gearing – 3S 3200mah Lipo – 37.5mph

Castle Creations Sidewinder ESC and 4600kv motor

Castle Creations Gearing and Speed chart

Castle Creations Castle Link programming kit

14/86 gearing – 6S 4200mah NIMH – 19.3mph
16/86 gearing – 6S 4200mah NIMH – 22.0mph
14/86 gearing – 2S 3200mah Lipo – 20.9mph
16/86 gearing – 2S 3200mah Lipo – 23.9mph
14/90 gearing – 3S 3200mah Lipo – 30.0mph
16/90 gearing – 3S 3200mah Lipo – 34.2mph
18/90 gearing – 3S 3200mah Lipo – 38.5mph

Castle Creations Sidewinder ESC and 5700kv motor (This setup seems like it could run hot)

14/86 gearing – 6S 4200mah NIMH – 25.2mph
16/86 gearing – 6S 4200mah NIMH – 28.8mph
14/86 gearing – 2S 3200mah Lipo – 25.9mph
16/86 gearing – 2S 3200mah Lipo – 29.6mph

Castle Creations Mamba Max and 5700kv motor (6 cell and 2S numbers match sidewinder combo)

14/90 gearing – 3S 3200mah Lipo – 37.1mph
16/90 gearing – 3S 3200mah Lipo – 42.4mph
18/90 gearing – 3S 3200mah Lipo – 47.7mph
18/86 gearing - 3S A123 - 47.2mph (Motor Temp - 177 ESC Temp - 155)

As for which speed control I would recommend? Well I have limited experience with the VXL system. I've drove one and have done some minor programming. It programs easily for a touch style speed control. I have a lot of experience with the Sidewinder and Max speed controls from Castle Creations. The sidewinder can be programmed right out of the box similarly to the process used for the VXL, however they offer the Castle Link programming kit that lets you customize braking power, throttle curves, braking curves, voltage cutoff, timing, start up power, etc all through the PC. The Mamba Max comes with this option.

There you have it!

[Rob #28]

Nice thanks for sharing! I made it a sticky.

[NickRummy]

Added some specs I got from a friend on another site who tried a 3S A123 setup with the MM 5700 combo.

[rocketrob40]

VERY nice work

[slammin]

Some very usefull information.

[chadrob30]

Aug 13, 2008 8:55:01 GMT -5 slammin said:

Some very usefull information.

Hey, another Arkie! ;D

[slashsmash]

thanx guy...

[dillon]

thanks for the info
very helpful

[travis57]

i kno this is random but wut would u reckemend... vxl or novak brushless system?

[nickyg0123]

that is some great info

[nickyg0123]

i have the same question as travis57

[cadenhouson]

Hey thanks for the info.... Im' running the mamba max with the 5700 and was wondering if going to the 23t pinion would help to keep my motor cool or if keeping the stock gears would be the better way to go?

[robbo89]

the bigger the pinion the hotter it will run, if it is running hot reduce the pinion, i am assuming you are using the 18t stock, so i would reduce to at least a 16t, you could also add a heat sink and cooling fan on the motor. reducing pinion is the correct way to fix over heating the fan will only mask the problem

[cadenhouson]

alright i'll try that thanks for the help

[xfxrider]

Aug 29, 2008 18:41:06 GMT -5 travis57 said:

i kno this is random but wut would u reckemend... vxl or novak brushless system?

I have the same question man...