Tekin 13.5 Gen 2 gearing, Ideas welcome

[xgerstandtx]

Hey guys, Just set up my Wraith for a 13.5 gen 2 motor.
Wraith weighs, 10lb 1 oz(heavy)
Built to hilt axles, trans, driveshafts BGR goodies everywhere.

ESC: Mamba max pro
Battery: 5000mah, 3 cell

Current gearing is 14/56 32 pitch gears. I took her out on a maiden voyage today and she is quick, but the crawling leaves a bit to be desired. I am kicking around two ideas of the gearing.

GO to a 60/14 for a ratio of 4.29
or the 56/13 for a ratio of 4.31

Or should i go deeper as I don't need all this top speed she has?

What have you guys found works for a hot motor and heavy rig.

[Johnnysplits]

IDK if I can help but mine weighs 7.85 lbs. I run 48P gears...14/93 with a Fantom Racing 7.5T pro mod race motor controlled by a BHR 120A LT4 esc on 3s. Just finished it a few hours ago and did a half ass test in the living room. It turns those tires pretty slow. Thinking about swapping out the axle gears for the 43/16's.

[xgerstandtx]

I think that your setup is a bit too different from mine, they always run well in the house, out on the trail is where the faults really come out. That 7.5 is a super hot motor. Your gearing is off even for that motor. It comes out to 6.64:1. Gearing your truck closer to 4.5:1 or even 5:1 will fix your issues. Try running a 86/17 setup It will put you at 5.05:1

[nuckle]

I run a 4600kv for snow bashing and do well with 56/12.

[bigstu]

DEEPER Much DEEPER..
You need to get that ratio more towards 6 to 1...
Right now I am running 15-90 on my SCX scaler (about 9 lbs), with a 13.5 Redline, on 3s.
Motor runs great, decent speed, crawls GREAT. And I can crawl it HARD and keep the motor in safe temps.
Get yourself a temp gun and check that motor. I bet after 5 minutes of running, you are getting that motor prettyhot...
Good luck..

[Calderwood]

I'm running a 3400kv 4 pole with 11/60. It's perfect imo.

[dittohead]

Im running a tekin 13.5t as well and with 12/56 gearing on 3s i find it a little too fast for slow technical crawling. Im dropping to 10/56 and ill probably leave it there

[Johnnysplits]

Originally Posted by xgerstandtx

I think that your setup is a bit too different from mine, they always run well in the house, out on the trail is where the faults really come out. That 7.5 is a super hot motor. Your gearing is off even for that motor. It comes out to 6.64:1. Gearing your truck closer to 4.5:1 or even 5:1 will fix your issues. Try running a 86/17 setup It will put you at 5.05:1

If im at 6.64:1 now, wouldn't gearing up as you suggest, make it more difficult to crawl due to higher wheel speed for the same rpm and place a much higher load on the motor? My idea was to gear as low as possible and then try different turn motors to find a great crawl speed and respectable top speed.

[axial 4x4 crawler]

Hello, I have almost the same question. My wraith ways about 7 pounds, it has full steal Robertson Racing trans. gears , and the idler gear. Full titanium (custom) driveshafts, vanquish steering knuckles, c-hubs, lockouts, and all links are titanium. I have the tekin rs with a 13.5 turn and my gearing is set to 87/20, is that to high for what I am running. also to let you know that I just bought a new 3s 5000mah 50c battery, and ordering a new tekin gen 2 10.5 turn , now is this to powerful of a motor for this truck, the gearing, and the esc? Is the esc capable of handling this much wait? And my temps are ok now but can I connect a fan to the esc soldering tabs so it stays cool? Just let me know if this to much motor/power, and yes I am putting a new 17 t pinion on it should this work with the 87 tooth spur? If anyone could tell me if I am doing this right let me know thank you I appreciate the help.

[Johnnysplits]

An update on my setup: Swapped out the 7.5T 5000Kv sensored motor for a 13.5T 2850Kv sensored motor, changed out the original ring/pinions for 43/13's, and 93/14 spur/pinion. Tires are 5.5". On 2s, crawls beautiful yet top speed sucks. On 3s, top speed is great yet crawling suffers. So now I have ordered a 21.5T 1600Kv sensored motor which should be here next week and we'll see how that one does. But ultimately, how it runs is what i'll live with. This will be motor #7 that iv'e tried in this thing to attempt to get the best of both worlds of crawling ability and decent speed.

[Calderwood]

Originally Posted by Johnnysplits

An update on my setup: Swapped out the 7.5T 5000Kv sensored motor for a 13.5T 2850Kv sensored motor, changed out the original ring/pinions for 43/13's, and 93/14 spur/pinion. Tires are 5.5". On 2s, crawls beautiful yet top speed sucks. On 3s, top speed is great yet crawling suffers. So now I have ordered a 21.5T 1600Kv sensored motor which should be here next week and we'll see how that one does. But ultimately, how it runs is what i'll live with. This will be motor #7 that iv'e tried in this thing to attempt to get the best of both worlds of crawling ability and decent speed.

That's going to be really slow. Like I said above I have a 3400kv 4 pole geared 11/60 and it crawls great and has tons of wheel speed for the big airs.

[Johnnysplits]

Originally Posted by nigels_world

That's going to be really slow. Like I said above I have a 3400kv 4 pole geared 11/60 and it crawls great and has tons of wheel speed for the big airs.

You wouldn't happen to have a vid showing it's slowest and fastest speed would you?

[Norcal_GIT_r]

10/56 here.
My rig is smooth when crawling and still has nice speed. It's not super fast but fast enough for me.

[Calderwood]

Originally Posted by Johnnysplits

You wouldn't happen to have a vid showing it's slowest and fastest speed would you?

I don't. I will take some video next time I get a chance. I have been meaning to for a while now. It's not comp crawler smooth but it it crawls plenty slow for scale/g6 style fun.

[Johnnysplits]

Originally Posted by nigels_world

I don't. I will take some video next time I get a chance. I have been meaning to for a while now. It's not comp crawler smooth but it it crawls plenty slow for scale/g6 style fun.

Yeah man post up when you do

[Androtaz]

Ive seen this rig in action. Jaw dropping

Originally Posted by Calderwood

That's going to be really slow. Like I said above I have a 3400kv 4 pole geared 11/60 and it crawls great and has tons of wheel speed for the big airs.

[PARTSJEREMY]

Im running a 13.5 gen two with rs pro gen 2, the fix for mine to crawl I put a rc 4wd two speed trans. super fast in hi range crawls almost as good as my moa crawler in lo range.

[Richterat83]

13.5 Gen1 should be arriving in the mail today. HOping to have it installed on an RC4WD 2 speed tonight powered by MMP. I know i'll swap pinions around, but should i start around 5:1 or go deeper and closer to 6:1 for the spur/pinion combo? It's OD up front and stock gearing in rear axle

Thanks in advance!!!