Choosing a motor and ESC for your Wraith - Gearing Added!

Bob The Crawler · Nov 14, 2013

I'm going to have 3653-3100kv sensored brushless motor.
Should be crawling and expedition but "live" not "racing fast".

The ESC is going to be Hobbywing XERUN-SCT-PRO.

Servo is going to be Futaba S9352HV and I thing the internal BEC is not up to the task (only 6V/3A) so I will probably connect it directly to balance port of LiPol battery. Very easy solution.

Still not decide if 2SLiPol or 3S LiPol.

What do you suggest as a gear ratio and Cell count?
Thanks all

Harley · Nov 14, 2013

Bob The Crawler said:
I'm going to have 3653-3100kv sensored brushless motor.
Should be crawling and expedition but "live" not "racing fast".

The ESC is going to be Hobbywing XERUN-SCT-PRO.

Servo is going to be Futaba S9352HV and I thing the internal BEC is not up to the task (only 6V/3A) so I will probably connect it directly to balance port of LiPol battery. Very easy solution.

Still not decide if 2SLiPol or 3S LiPol.

What do you suggest as a gear ratio and Cell count?
Thanks all

I run 3s on everything. For gearing, you can pretty much follow the first page.

I would suggest a BEC if you go 3s. Otherwise you will be drawing 2 cells down unevenly from the 3rd cell. I don't see a reason to do that vs installing a BEC.

Bob The Crawler · Nov 14, 2013

Well I would follow the first post but I have no ideat how many Turns is this 3100KV motor.

I was thinking about 3S + BEC as well. I don't care about drawing two cells more than the third one as I will balance charge them anyway. One servo can't hurt it

Calderwood · Nov 14, 2013

cravo said:
Hi i bought this motor because of your tip, and im loving it. I paired with a mmpro esc, but im running 2s lipo 40c 5800ah and a venom hardcase 5000mah 50c. I am using 56/14 gearing. But what i would like to know is what are the settings you use on the mmpro for this motor. Sensored only, cheat mode on? What rpm range? Smart sense? What timing advance? I use this to crawl and to foff but i would like to have a litle more speed out of it without overheat the esc. Can you please share your configs? Or will i need a 120amp sensored esc constant, since mmpro is a 80amp constant with 120 amp burst and the esc that comes in this combo brings a 120amp constant and amazing 760 amp burst. Please let me know your experience. Thanks

I replied to your pm.

Bob The Crawler said:
I'm going to have 3653-3100kv sensored brushless motor.
Should be crawling and expedition but "live" not "racing fast".

The ESC is going to be Hobbywing XERUN-SCT-PRO.

Servo is going to be Futaba S9352HV and I thing the internal BEC is not up to the task (only 6V/3A) so I will probably connect it directly to balance port of LiPol battery. Very easy solution.

Still not decide if 2SLiPol or 3S LiPol.

What do you suggest as a gear ratio and Cell count?
Thanks all

Be aware that the xerun sct pro has a reverse delay. A mmp would be a much better option.

Bob The Crawler said:
Well I would follow the first post but I have no ideat how many Turns is this 3100KV motor.

I was thinking about 3S + BEC as well. I don't care about drawing two cells more than the third one as I will balance charge them anyway. One servo can't hurt it

You would be surprised how much a servo will draw down those two cells. When you hit lvc the two cells that run the servo will be below the minimum. Just get cc bec and be done with it. Using the interal bec (which is better on hobbywing than castle) would be better than destroying lipos.

treys1 · Nov 14, 2013

cravo said:
Hi i bought this motor because of your tip, and im loving it. I paired with a mmpro esc, but im running 2s lipo 40c 5800ah and a venom hardcase 5000mah 50c. I am using 56/14 gearing. But what i would like to know is what are the settings you use on the mmpro for this motor. Sensored only, cheat mode on? What rpm range? Smart sense? What timing advance? I use this to crawl and to foff but i would like to have a litle more speed out of it without overheat the esc. Can you please share your configs? Or will i need a 120amp sensored esc constant, since mmpro is a 80amp constant with 120 amp burst and the esc that comes in this combo brings a 120amp constant and amazing 760 amp burst. Please let me know your experience. Thanks

You shouldnt need anything more than the MMP and since you already have it I would use it.

I would suggest sensored only with 0 cheat or timing of any sort. If you want more out of it go up to 3s, you wont be happy with timing when crawling.

treys1 · Nov 14, 2013

The reverse delay is minimal on the SCT Pro and the v3.1's.

I would however stay away from the Justocks and Xtreme Stock until they update the firmware as the delay on those is severe.

Calderwood · Nov 14, 2013

treys1 said:
The reverse delay is minimal on the SCT Pro and the v3.1's.

I would however stay away from the Justocks and Xtreme Stock until they update the firmware as the delay on those is severe.

It's not that bad and I hate to even call it a delay since if the wheels are not moving forward there isn't even a delay but, I still think the mmp is a better for crawling. If he does use the Sct pro don't use the most current firmware since the start up is terrible. The firmware before the most current has a much slower start up.

Edit: I believe the v3.1 (or whatever the expensive hw esc is) can be flashed with brushlesshobbies firmware for zero delay.

Harley · Nov 14, 2013

Bob The Crawler said:
I was thinking about 3S + BEC as well. I don't care about drawing two cells more than the third one as I will balance charge them anyway. One servo can't hurt it

Post 4 has the gearing info. You can equate that motor to a 13.5 or so. 56/14 32p is what is stated in that post.

You'd be very surprised how much of a difference it can make. I don't see any reason to run that setup.

cravo · Nov 16, 2013

treys1 said:
You shouldnt need anything more than the MMP and since you already have it I would use it.

I would suggest sensored only with 0 cheat or timing of any sort. If you want more out of it go up to 3s, you wont be happy with timing when crawling.

Thanks but my mmpro with the latest beta firmware, when i do a hard slow crawl it kicks in the fan past 3 minutes crawling, on a 2s lipo 5800mah 40c, when i was using castle 2400kv the fan almost never turmed on even with a 28t pinion on stock 80 spur. Now im using 56/14 pitch 32 gears, the hobbywing doesnt even warms up, but my mmpro kicks is the fan quick, never did thermal thought, but i like my electronics cold. I use a hitech 7955tg servo on the mmpro with no bec, maybe its helpinh on the heating issue, but i had the same set up with 2400kv sct 4 pole 1415 from castle and that didnt happen, and run times were way better. Maybe i have to regear and get a smaller pinion, or jump to 3s or both. But i only have 2s so i would like to use what i have without heating the esc, motor and battery temps are barelly warm, no matter how you drive it, on crawling fan kicks in pretty quick. Other tham that awsome motor, awsome low end power, budget friendly, and a direct fit on the wraith. Any ideas on how to solve this? I would like to have the speed i have now because i also foff with it. Thanks

Bob The Crawler · Nov 16, 2013

I'm maybe stupid but can someone help me where I can find the gears? I mean the gears - NOT the gear ratio.

I know I need to get the 32p. 56/14.

Thanks for any help where I can find that and actually buy. "thumbsup"

Calderwood · Nov 16, 2013

Bob The Crawler said:
I'm maybe stupid but can someone help me where I can find the gears? I mean the gears - NOT the gear ratio.

I know I need to get the 32p. 56/14.

Thanks for any help where I can find that and actually buy. "thumbsup"

DTXC9397 is a direct fit 56t 32p spur. You can use any brand steel 32p pinion you want. Just make sure you buy a pinion for the shaft size of your motor. 1/8" or 5mm.

Bob The Crawler · Nov 16, 2013

Thank you very much. I ordered the 32p 56t spur and 5mm pinions for 32p (13t, 14t, 15t) so I can play with it

Thanks!

Chuggz · Nov 16, 2013

Is a 17.5t as fast as stock?
Thanks

nicholask1993 · Nov 16, 2013

Picked up one of the Duratrax Onyx 80A 3650Kv 4Pole combos from tower for $105.

Going to start off with 14/54 gearing on 2S with some 2.8 Trenchers...

Sent from my iPhone using Tapatalk

cravo · Nov 18, 2013

nigels_world said:
DTXC9397 is a direct fit 56t 32p spur. You can use any brand steel 32p pinion you want. Just make sure you buy a pinion for the shaft size of your motor. 1/8" or 5mm.

Nigels i found the right set up for mmpro + hobbywing xerun 3400kv THANK YOU FOR YOUR ADVICE, Im just loving it. take a look at it on the videos below.
check this videos on youtube i just made with mmpro + hobbywing 3400kv sensored brushless.

check this videos on youtube i just made with mmpro + hobbywing 3400kv sensored brushless.

Axial Wraith Hobbywing Xerun 3400kv sensored + mmpro + 56spur 14pinion - YouTube

my 3 year old son crawling lol
Axial Wraith hobbywing xerun 3400kv crawling on rocks - YouTube

doing some fofing with ripsaws on 2s lipo
AXIAL WRAITH MMPRO + HOBBYWING XERUN 3400KV 4 POLE 56 14T ON 2S LIPO - YouTube

AXIAL WRAITH + MMPRO + HOBBYWING xerun 3400KV 4 POLE SENSORED - YouTube

wraith hobbywing Xerun 3400kv 4 pole sensored - YouTube

AXIAL WRAITH HOBBYWING 3400KV UPHILLS DOWNHILLS - YouTube

my channel more videos to come i am very pleased with this set up, JUST AWSOME AND LOW BUDGET MOTOR WITH HUGE TORQUE, ALWAYS COOL...
nuno fonseca - YouTube

aggieljh · Nov 18, 2013