Limitless Limitless with blx 2050 and gearing

[raynist]

Just ordered a limitless.

I already have an extra blx 2050 and 185 esc that I plan to use to start.

There is a big school/church parking lot nearby that I plan to use this at.

I am not looking to go 100mph at this time but maybe closer to 75-80 with great and keep the temps low.

Should I use the gearing that comes with the Limitless kit or change the pinion to something smaller? Maybe a different spur gear or is the stock gearing ok to use?

What is the benefit/downside to changing the differential to an infraction differential? I already have an infraction that I use to bash around at this same lot. Not really looking to bash this. Just want something faster for speed runs.

Thanks!
Ray

 

[jondilly1974]

Stock gearing is for speed runs only with that setup. You will get the speeds you’re looking for, but it will run hot if bashing. You either need a bigger motor and ESC or smaller gearing. Best way to gear down is get a larger spur. Going smaller pinion is hard with that motor mount with the stock spur.

 

[Boggs3010]

46t diff

This is stock from the infraction.

 

[raynist]

I will likely get a bigger motor/esc at some point but to keep the cost down right now I will go with what I have.

spur gear seems like the easiest and cheapest way to gear down.

what size would be good?

 

[Boggs3010]

20t no more then 25t things will heat up and possible ESC cut off. Unless you have GCRC fans

 

[rotauq]

Just start with the smallest pinion you have that can touch the 34T spool of the limitless. If it runs hot, switch to the infraction diff it will give you just that extra range to drop the pinion further. If it stays cool you can increase the pinion.

The bigger the can the cooler it stays and the more potential it has. If you wanna keep the battery trays/motor mount, you can fit up to 42x91

 

[raynist]

20t no more then 25t things will heat up and possible ESC cut off. Unless you have GCRC fans

What are the GCRC fans? 20T for the pinion?

 

[phildogg]

Limitless comes with a 34t spool stock. They offer a 39t i think so i would try something like 24/39

What are the GCRC fans? 20T for the pinion?

game changer rc fans on ebay, 20t pinion won't reach stock spur gear.

https://www.amainhobbies.com/arrma-...2DoKlXNgOlizH6xrjZUL0bV4YFB0XhzsaArBZEALw_wcB
39t optional spur gear

 

[jondilly1974]

You can use just about any 8mm bore spur or pinion gear with some creativity. But to be honest, I would just throw in the center diff from the Infraction (46T) or any of the other 6S rigs (50T). That would be the simplest swap.

 

[raynist]

You can use just about any 8mm bore spur or pinion gear with some creativity. But to be honest, I would just throw in the center diff from the Infraction (46T) or any of the other 6S rigs (50T). That would be the simplest swap.

Thanks. I may do this - then I could keep the stock pinion and spur?

46 or 50t center diff better?

 

[Engineer]

I’m using a 46T Infraction spur with a 20T pinion on my limitless with a BLX 2050 motor.

 

[jondilly1974]

Thanks. I may do this - then I could keep the stock pinion and spur?

46 or 50t center diff better?

Not much difference tbh. Not enough to worry. Get the one that’s easiest or cheapest.

 

[raynist]

Not much difference tbh. Not enough to worry. Get the one that’s easiest or cheapest.

Thanks.

50t is cheapest by far.

is it just a drop in replacement - nothing else to change?

 

[Sergbaja5t]

Im in the same boat. Gearing up to 39/25. The 34/27 with 2050 kv gets way too hot. Gonna get a 40 to hear down even more.

 

[raynist]

I ended up with the 50T center diff and a 22T pinion (had it laying around).

What top speed should I see with the Arrma 2050 motor?

played around on my street and got 63mph. I am sure it has more in it as I had to brake just as it was hitting its stride

 

[Engineer]

I ended up with the 50T center diff and a 22T pinion (had it laying around).

What top speed should I see with the Arrma 2050 motor?

played around on my street and got 63mph. I am sure it has more in it as I had to brake just as it was hitting its stride

My calculator says 70.35 MPH which is an ideal number - so 63 MPH is probably close.

 

[raynist]

Thanks!

what calc are you using?

hoping to go 80. thinking I need the 46t diff instead of the 50. Seems I may be able to fit a 23/24T pinion but that is all.

probably have more options with the 46t unless there is a different motor mount or I dremel....

 

[SrC]

I ended up with the 50T center diff and a 22T pinion (had it laying around).

What top speed should I see with the Arrma 2050 motor?

played around on my street and got 63mph. I am sure it has more in it as I had to brake just as it was hitting its stride

You are not going to get any faster than high 70's or 80 MPH with your set up. Also if you are serious about speed, drop your punch all the way down. And find some open space. You have plenty of room for taller gearing. I would have used the spool. Mistake to not use it. ?‍

 

[raynist]

You are not going to get any faster than high 70's or 80 MPH with your set up. Also if you are serious about speed, drop your punch all the way down. And find some open space. You have plenty of room for taller gearing. I would have used the spool. Mistake to not use it. ?‍

I can still use it - I didn’t get rid of it.

looking to go 75/80 but still be able to bash around a big parking lot. Thought the spool wasn’t good for turns, only speed/straight line?

 

[SrC]

I agree. But I have both the Lim and Infr.
Infr is all stock. The diff works against you at a certain speed. If you want bash and drift, yes the spool is no good at all. Spool will keep the lim much more directional. The Lim in general doesn't like to drift even with a diff. The Lim is ass heavy, IMHO compared to the Infr. and has a LCG. The Lim struggles to drift in general. ?‍

Edit:
My Lim turns on a dime with the spool, but it is so locked that it wont drift as easily at all compared to a center diff. Power slides are hard to do.
With a spool it turns like it is hooked up solid. You could do technical driving no issue. Just hard to push it loose.