14 turn cobalt....

[brokennib]

I have a BRXL/14 turn puller combo coming in today from HH, and to be honest, my head's spinning between all the specs on 7 and 10 turn pullers, not much on the 14turn. never run a puller, haven't a clue where to start on gearing or how to even set the timing.

Here's my situation: I've been running Parkers' G6's for about a year. These can be tough on an RC in allot of new and different ways... It's a rally event where you run on average 300 trailmarkers over the course of the day, one course can be up to 200 T/M, and could be an hour or more of constant running over all kinds of crazy terrain. (rocks, mud, water, etc,etc,etc.)

I run a heavy rig (10+ lbs) and when the foams are wet it's even heavier. I was running a 3cell Goat with 18turn brushless, replaced two timing rings in it before it finally went up in a mushroom cloud a few months ago. Then I ran a 23 turn handwound (from JPH) which was great until I shorted out a wind and that blew up on another G6. Since then I've gone through about 4 motors.
My gearing hasn't been anything crazy, 14pinion, stock spur(87?)

Finally, I got around to this combo. I'm hoping it will do the trick. I chose the 14 'cause I'm hoping it will keep the temps low while providing a lot of giddy-up, with respectable run-times.

Anyway, the point to this babble-fest is where do I start with the gearing? Do I have to advance the timing 6degree's out of the box? Anybody else running the 14turn? How does it do on 3 cell? Or 4 cell?

[BigSki]

interested in seeing what info you get on these, I'm considering using a puller in my Willys, I'm sick of smoking my handwound 35T's.

[EeePee]

I have one. In regards to the timing, I'm thinking John has it set somewhere safe, but it's always a good idea to double check or set it yourself. Run it for a second forward and reverse full speed and listen for forward running faster. If it doesn't loosen the two screws on the endbell, and rotate the the thing about an 1/8 of an inch counterclockwise looking down on it. Tighten up the screws and do the forward and reverse thing again and listen for a faster forward. Keep going until you get a slightly faster forward.

Might as well start with the same gearing and see how you like it, though it'll probably be a little slow, until you up the voltage. The BRXL and that motor take a liking to 6S lipo. I ran that in a truck a while ago and loved it. If you stick with a 3 or 4 cell lipo, keep going up pinion gears while checking for excess heat in the motor. There's probably enough grunt in that motor to be able to handle a rather large pinion gear.

[brokennib]

Originally Posted by EeePee

I have one. In regards to the timing, I'm thinking John has it set somewhere safe, but it's always a good idea to double check or set it yourself. Run it for a second forward and reverse full speed and listen for forward running faster. If it doesn't loosen the two screws on the endbell, and rotate the the thing about an 1/8 of an inch counterclockwise looking down on it. Tighten up the screws and do the forward and reverse thing again and listen for a faster forward. Keep going until you get a slightly faster forward.

Might as well start with the same gearing and see how you like it, though it'll probably be a little slow, until you up the voltage. The BRXL and that motor take a liking to 6S lipo. I ran that in a truck a while ago and loved it. If you stick with a 3 or 4 cell lipo, keep going up pinion gears while checking for excess heat in the motor. There's probably enough grunt in that motor to be able to handle a rather large pinion gear.

Thanks for the info, gives me a good starting point, and it makes sense to start out with a 15 pinion and gear up from there. I'll just have to have a couple of shakedown runs with a temp gun to find the sweet spot. Looks like I'll just have to pick up a 4 and 6 cell lipo. Aww Shucks.
Got my package today, and this thing is really interesting, the can is longer, but with a smaller diameter. The comm is huge!
Motor's cool but there is something a little out of whack: there is no flat spot ground on the shaft for a pinion. (?) Plus the mount is tapped for 4-40 instead of 3mm (??)

[EeePee]

Originally Posted by brokennib

Motor's cool but there is something a little out of whack: there is no flat spot ground on the shaft for a pinion. (?) Plus the mount is tapped for 4-40 instead of 3mm (??)

All three of my Pullers have the flat spot, but it shouldn't be an issue if your set screw has that little cup on the end to dig in. You could always grind one I guess, but you should be okay with the right set screw.

4-40 it is, and that's just the way it is. At least you got some screws with it.

[brokennib]

Originally Posted by EeePee

All three of my Pullers have the flat spot, but it shouldn't be an issue if your set screw has that little cup on the end to dig in. You could always grind one I guess, but you should be okay with the right set screw.

4-40 it is, and that's just the way it is. At least you got some screws with it.

Yeah, I can always file a flat spot on this thing, I can deal. I usually have to change the motor screws anyway because my motor plate is 5mm thick. I just have to dig up my standard hardware. Meh, I'll live.

[Duuuuuuuude]

Originally Posted by EeePee

4-40 it is, and that's just the way it is. At least you got some screws with it.

I tore mine down and tapped two of the holes to accept a 3mm.

[JohnRobHolmes]

Good info for sure. I don't really have much to add, except if you have a temp gauge it is best to keep the can under 180f. The magnets will take 300f, but I recommend 160f on the can just so the motor lasts a really long time.

You should have a lot longer service life and lower operating temps with the puller. It is about time I get the Puller 2 done so we can continue having such awesome motors when my supply runs out.

[brokennib]

Originally Posted by JohnRobHolmes

Good info for sure. I don't really have much to add, except if you have a temp gauge it is best to keep the can under 180f. The magnets will take 300f, but I recommend 160f on the can just so the motor lasts a really long time.

You should have a lot longer service life and lower operating temps with the puller. It is about time I get the Puller 2 done so we can continue having such awesome motors when my supply runs out.

Thanks, I should order an extra set of brushes just to have on hand, but it sounds like guys are getting really good "Mileage" out of a pair. (with proper care, of course.) Maybe later.

I'm just kinda taking my time with this, I'm also new to the BRXL, and using a castle link. (Historically I'm a Novak guy) I have a feeling running big voltage can get pretty addicting. I have good feelings about this combo.

Anyway, picked up some air filter foams to cover the endbell and filter out the crud. I'll wash them to get a majority of the oil out of there.

[brokennib]

Originally Posted by Duuuuuuuude

I tore mine down and tapped two of the holes to accept a 3mm.

Thats a good idea, the world is FULL of options!!

[brokennib]

After switching around some wiring and making a simple radio tweek, I made a successful run around the yard. Timing was set up perfectly.
I threw a 18t pinion on the motor as a starting point- not a whole lotta top speed, (on 3cell) but the torque is AWESOME ! Wow! Torque is one of those things I don't usually miss until it's gone, like the last three cheap stock motors. Very cool.
I'll do more proper testing this weekend, I'm waiting on a few parts. I have a 4cell on the way and a set of felsonfest spools to help beef up the drivetrain, I definatley want those in before I order a 6cell

In the meantime I can get more familiar with the Castle Link software. I'm also really happy at how it cleaned up all the wiring on the truck-having the onboard bec is real handy.

Anyway, I'm just digg'in the hell out of this combo. Thanks guys for the all the help !

[brokennib]

Just a itty-bitty update.....

Welp, after many calculations. (really just punching numbers into a setup calculator) and a lot of guess-timating, I came up with some gearing numbers that were a start.



Anyway, the combo ran great yesterday 40+ minutes of solid, somewhat demanding runtime. Highest temp (with 4cell) was 117 degrees. Not bad
That's a final drive ratio of 10:53, I might little lower to see how that goes.

I'm just jazzed as hell about this combo, really worth the investment.

[Duuuuuuuude]

[highlandcrawler]

The puller motor are awesome for their control and power. i love mine for sure. To figure out your final drive you need to figure your axles into the equation also. You should be in the 25:1 - 35:1 area in most cases running the axial tranny.

[brokennib]

Originally Posted by highlandcrawler

The puller motor are awesome for their control and power. i love mine for sure. To figure out your final drive you need to figure your axles into the equation also. You should be in the 25:1 - 35:1 area in most cases running the axial tranny.

Thx, I did'nt even think about the axles... most of those #'s are B.S. anyway because there were so many variables...... I'm literally going by "big number, little number" run time and temperature.
If you squint hard enough, it almost looks as though I know what I'm doing.