Did I buy the wrong motor??

[Bryank930]

I just ordered this combo for my Granite in 3500kv: https://www.rcjuice.com/motor-esc/m...-motor-3-2mm-shaft-includes-program-card.html

Now after some more reading, I'm finding I should have gone with a 3660 motor.

Will I be fine with what I bought (scheduled for delivery Monday) or should I pick up a 3660?

 

[nino]

550 = 3660 so you're good.

 

[Oldskool]

Shouldn't the shaft be 5mm?

 

[Turbobrick]

2945 - 3660 use 3.17 to 3.2mm pinions

 

[nino]

2945 - 3660 use 3.17 to 3.2mm pinions

Mostly, not a rule.

 

[Bryank930]

Sounds like I'm good with the 540 size, but will I regret not getting the 5mm shaft?

 

[nino]

It's 550.
And 3.17mm is standard. 5mm is for 1/8th scale motors.

 

[Bryank930]

It's 550.
And 3.17mm is standard. 5mm is for 1/8th scale motors.

Haha, typo. I meant 550. I'll just run the 3.17 until it breaks...IF it breaks.

 

[birdracer99]

Technically that motor is a 3655, a bit shy of 3660.

 

[Jerry-rigged]

Motor and motor shaft will be fine. Don't gear it to the moon, start with 14t or 17t pinion gearing, and work up. Are you swapping the slipper and motor mount?

 

[Bryank930]

Motor and motor shaft will be fine. Don't gear it to the moon, start with 14t or 17t pinion gearing, and work up. Are you swapping the slipper and motor mount?

That's good to hear. I have the adjustable BLX mount already installed, currently running 17/91 48P until the BLX slipper assembly arrives in a few days. It's already much quicker than the brushed setup with the same gearing.

Now, onto another question...with the new ESC/Motor setup, do I need to move up from EC3 plugs to EC5 or something similar? I know EC3's are rated at 60A and my ESC is 80A, but it doesn't pull the full 80A all the time, right?

 

[nino]

It'll be fine, it's used in 2s-3s rigs, same as the equivalent XT60. Anything better than Tamiya or Deans is OK.

 

[Jerry-rigged]

Assuming good soldering joints, a 80A ESC will burn up long before a 60A EC3. Still, it is good to keep an eye on temps. When you unplug batteries at the end of a run, make a point of noting if the plug is warm and how warm.

 

[Freelander]

Hey fellow money pitter!!

We are mega upgraders also!

It's fun!
We went ec5. The larger size meant it was easier to solder. But if you have batteries already you have to be very careful doing the connections on them if you are putting new connectors on. Only work on one pin at a time and be careful not to short your battery!

If the gurus on the forum say ic3 or ec3 is good you're probably gold. We have gotten solid advice on here.

I found it easier to work with the bigger pins and ec was easier than ic. We got some big diameter heatshrink to try and seal it somewhat.
We are running a 15T with the 57T 0.8 mod/ 32P blx tranny. That's stock for the granite blx I believe.

We have a 3660 3300kv. On 2S we had zero heat issues. On 3S things are getting hot. We bought a fan. Cheesy thing. Zip ties onto the motor. Dunno if it actually does anything. I was hoping to find an aluminum heatsink with a fan. I might get the arrma one because it should fit.

 

[Bryank930]

So I finally got my BLX slipper setup installed and at 15/57 gearing (stock granite BLX ratio), this thing rips! And I'm only on 2S! I can't wait to see what this thing can do once my 17T pinion and 3S battery arrive.

The plug was a little warm after a full pack ripping around the street and grass today, but it wasn't any warmer than everything else, so I think the EC3's are going to be fine. I'll probably need to run an adapter when I get my 3S pack though, it's got a Deans plug on 10awg wire. The 12awg from my ESC barely fit in the cup on my EC3 pin.