divorced setup help!!!!

[Hoyta]

I have a new truck to play with, but its slow as crap!
I have this original disruptor planetary transmission and the 2.18:1 t-case. They have a .75:1 t-case, but not sure if it would increse speed as much as I want. This chassis and interior have been built around the disruptor t-case, but the killer or gcm case could be swapped it easily enough.
My question is- What are the options I have? I don't really want to cut the chassis, and don't understand gearing at all
Thanks everyone!
-Adam

[Charlie-III]

Originally Posted by Hoyta

I have a new truck to play with, but its slow as crap!
I have this original disruptor planetary transmission and the 2:18:1 t-case. They have a 75:1 t-case, but not sure if it would increse speed as much as I want. This chassis and interior have been built around the disruptor t-case, but the killer or gcm case could be swapped it easily enough.
My question is- What are the options I have? I don't really want to cut the chassis, and don't understand gearing at all
Thanks everyone!
-Adam

OK, if your numbers are correct, you do NOT want the 75:1 trans.

WHat the numbers means is, the number of turns into the trans vs. the number of turns out of the trans.

The 75:1 trans means the input (motor in this case) will spin 75 times for every turn of the output.

The 1st trans, is that a 2.18:1, or a 218:1????? makes a big difference. If it's 218:1, then the 75:1 trans will be ~3 times faster (less gear reduction) than a 218:1 trans.

[old man 52]

Adam , What turn motor are you using.

[Hoyta]

using a 19t orion motor

[Hoyta]

edited first post- it is 2.18:1 that I have, and the .75:1 is what I am looking at getting. Obviously it will be faster- almost 3 times...

[old man 52]

Still that thing should move right along, What esc are you running?

[Maxwedge]

Hoyta I'm feelin ya. I built my chassis around the Disruptor planetary trans and 2.18 t.case also. No matter what motor I use it's slower than snail shit. Torque monster, yes, but in the straight parts of the course, or the hillclimb, or the mudbog, or just friendly trail running, it SUCKS. With a 30t Brood Onslaught motor it's the slowest scaler in my club, hands down, but I'm stuck cause I built the chassis around it, and the small beetle body and full interior don't give enough room to swap in an Axial trans in the same forward location.
And I tried the .75:1 "overdrive" t.case. Didn't work. It WAS at least twice as fast on the sidewalk, but it didn't put down enough grunt to crawl up onto a red brick. I swapped in a 70t lathe motor to double check and it just could not crawl. Very disappointing.
I posted a thread a while back about this, asking Galande owners what they're using/doing to make this drivetrain work, but didn't get any good responses. Hope you get better results.

[Pointman]

It seems like if it's geared that low, a brushless setup would work good.
It shouldn't cog, because it would be spinning pretty fast even at crawling speeds.

[Charlie-III]

Originally Posted by Hoyta

edited first post- it is 2.18:1 that I have, and the .75:1 is what I am looking at getting. Obviously it will be faster- almost 3 times...

OK, makes a bit more sense now.

This may be a great time to go brushless, as mentioned you won't see cogging even on a sensorless motor (more than likely).
Not sure what motor, but a high KV (or low "T") sensorless brushless would work.
You could also up the battery voltage.

[Hoyta]

I'm running one of the older Mamba Max escs, so 3s is max. What motor do you guys think would be the way to go?

[old man 52]

Adam Ive run a crawl master on an older mm in a r2 and had good luck , if that helps.

[Hoyta]

Need advice on what motor would be good for it? A 550 sc motor?