Limitless Limitless engine won’t move over enough

[green98tj]

Hello, I just bought a limitless and no matter how big a gear I put on the motor it won’t move over enough to engage the gear on the driveshaft. I can see that the engine mount slide is fully moved as far as it will go the the center of the car. I have a felony which is very similar. Comparing the two, it seems the driveshaft gear is much smaller on the limitless than the felony. The only think I can think of is the factory put on the wrong gear on the driveshaft but that seems unlikely. Any ideas? Thanks.

 

[3d-rc.myshopify.com]

Limitless has a spool not a diff and yes much smaller gear. What motor and pinion are you using?

 

[rotauq]

You need a 27 or 28T pinion to make it mesh the standard 34T spur on the spool. Spools are made for speedrunning and like big pinions.

You can put a 46T diff in there if you wanna bash/drift like the felony. Or get a bigger 8M spur to make it fit with smaller pinions if that's your aim.

 

[Edough13]

Smallest pinion will be 26t with the 34t spur and that might not mesh so to be safe 27t

 

[jondilly1974]

Arrma makes a 39T gear for the Limitless spool. You could get that and run smaller pinions if top speeds above 100mph are needed. I run that setup in my Infraction.

 

[green98tj]

Limitless has a spool not a diff and yes much smaller gear. What motor and pinion are you using?

Castle 1515-200Kv motor and the high speed gear that came with the limitless.

 

[rotauq]

In my case the 27T (high speed gear) also didn't mesh nicely with the 34T spur on the spool using the original mount. If @Edough13 managed to put a 26T on it, maybe there is quite some QA tolerance on the mount?

 

[LibertyMKiii]

We should also address the question of what you want to do with the car.
If you plan on doing anything other speed runs making no more than 1-2 passes then you need to get the 46t diff for this from an infraction.
Otherwise you will be overheating!

If you want to speed run you have the right setup and may wan to get the 39t spool gear from Arrma as Jon mentioned above.

 

[Sloclone100]

Arrma makes a 39T gear for the Limitless spool. You could get that and run smaller pinions if top speeds above 100mph are needed. I run that setup in my Infraction.

I'm wondering what range your pinions are. I am getting the 39 spur gear. What would be the largest you would attempt with the 39?

 

[Edough13]

I'm wondering what range your pinions are. I am getting the 39 spur gear. What would be the largest you would attempt with the 39?

I'd say it depends on the setup hugely. As some motors might not handle over say 35/39 gearing and others may handle 39/39 just really depends. Also depends on the mount some mounts you could go as high as 43/39 and others may only go to 32/39.

 

[jondilly1974]

I'm wondering what range your pinions are. I am getting the 39 spur gear. What would be the largest you would attempt with the 39?

You could potentially build up to 1:1 gearing if your electronics will allow. But you need to focus on getting used to driving it at speeds under 80 before worrying about pushing 100 or more.

 

[rotauq]

What diff's you are running also makes a big difference. I just switched to the GP5 (2.8 instead of 3.308) and now 34/38 was already to much for my 1750kv TP 4060.

I made a giant lookup table containing my assortment forcing myself to think in motor to wheel ratio instead of S/P.

Gear_ratio	T_spur	T_pinion	Diff Name	Diff_ratio
3,387​	27​	46​	GP5	2,8​
3,492​	27​	39​	GP5	2,8​
3,511​	27​	38​	GP5	2,8​
3,539​	34​	46​	GP5	2,8​
3,594​	27​	34​	GP5	2,8​
3,626​	38​	46​	GP5	2,8​
3,644​	27​	32​	GP5	2,8​
3,648​	39​	46​	GP5	2,8​

...

 

[Army_Vet_Rc_Addict]

Arrma makes a 39T gear for the Limitless spool. You could get that and run smaller pinions if top speeds above 100mph are needed. I run that setup in my Infraction.

The Limitless v2 comes stock with a 39t spool not a 34t ive got a limitless v2 and it's geared with the stock 39t spool with a 34t pinion I hit 121mph

The Limitless v2 comes stock with a 39t spool not a 34t ive got a limitless v2 and it's geared with the stock 39t spool with a 34t pinion I hit 121mph