Is my brushless running hot?

[Oh How Original]

3.4v per cell is fine.

[papasmurf]

3.4v per cell is fine.

It's the highest setting so I thought it better to be over cautious than b@#@er up a lipo

Rob

[Oh How Original]

Well strictly speaking you shouldn't really let a LiPo go below 3.2v per cell.

Always worth having a LiPo buzzer on as well, just to be on the safe side

[Tug]

I've got two Xerun 150 Amp ESCs that are set to 3.0 volts per cell to achieve a perfect 3.4 volt cut-off. I also have a HW 150 Amp Pro ESC that is set to 3.2 volts to achieve a perfect 3.4 volt cut-off.

Use an alarm to find where your ESC is best set to.

[papasmurf]

Just been out running up & down the road with 3-4 sec throttle burst then heavy breaking, after 10-15 mins the motor was reading 62c ( 143f )

Is this ok?

Punch & timing turned right down

Rob

[4eyes]

Perfect

[Tug]

Just been out running up & down the road with 3-4 sec throttle burst then heavy breaking, after 10-15 mins the motor was reading 62c ( 143f )

Is this ok?

Punch & timing turned right down

Rob

If it's around that temp after a full pack, then I'd say you've got that quite well dialled.

[papasmurf]

Just run a full pack + half ish with the body on and my kids driving in this heat & it was reading 200f on the rear of the motor & 160f on the side nr the front (I will put the vid up soon)

I think maybe it is a little hot still.

My Esc & lipo are between 90-100f

Rob

[papasmurf]

Hers the vid just to show how they like to drive lol

http://youtu.be/UegdprNWt2M

Rob

Edited July 18, 2014 by papasmurf

[Tug]

93 is too hot, I think you'll need to adjust your gearing again.

[Oh How Original]

Get some decent holes in the shell as well, both front and back to direct airflow, I've dropepd temps by 20-25F simply by doing that before today, same motor, esc, lipos and driving conditions as the first test with no holes.

Definitely worth doing, it all helps

[papasmurf]

I'm going to order a 15T pinion and like you say put a few holes in the shell. I'm still thinking it's going to end up slow trying to get my tems down

What's the best places to put holes as its a forward cab body?

Rob

Edited July 18, 2014 by papasmurf

[Tug]

What voltage was this on? The ESC and lipos were cool, so if you were running high voltage, (6s) it might be under geared?

[Noj]

Watching the video, the kids are seldom off the throttle, then hammer it, inducing wheelspin, slow a little, hammer it, wheelspin etc. That style of driving will increase motor temps especially in this weather with high ambient temps.

[Tug]

Dropping a couple of teeth won't make that much difference to the speed.

[Oh How Original]

I'd personally put a slit across the bottom of the cab front window and then in the same place at the rear of the cab, that should make air flow in and the hot air out and help you a bit.

[papasmurf]

What voltage was this on? The ESC and lipos were cool, so if you were running high voltage, (6s) it might be under geared?

This was on 4s

Watching the video, the kids are seldom off the throttle, then hammer it, inducing wheelspin, slow a little, hammer it, wheelspin etc. That style of driving will increase motor temps especially in this weather with high ambient temps.

I did say the kids style was erratic to say the least lol

Rob

[Noj]

Tbh Rob, it's not far off my 'style' either......

[papasmurf]

Tbh Rob, it's not far off my 'style' either......

I don't get enough time with the controller to get a 'style' but as long as the kids are enjoying it it I guess its worth the time & money

Rob

[Tug]

Definitely drop two teeth and try again. Not much to lose.

[papasmurf]

I will end up with a nice collection of pinions if nothing else lol

Rob

Edited July 18, 2014 by papasmurf

[big turbo]

Watching the video, the kids are seldom off the throttle, then hammer it, inducing wheelspin, slow a little, hammer it, wheelspin etc. That style of driving will increase motor temps especially in this weather with high ambient temps.

+1 on that ^^

If your testing for temps you need consistent runs under the same conditions. IMO dropping to a 15t pinny will to much.

[papasmurf]

+1 on that ^^

If your testing for temps you need consistent runs under the same conditions. IMO dropping to a 15t pinny will to much.

When I was running it myself up & down the road it was fine but I really need it fine for the kids too.

Rob

[big turbo]

What radios are you using. ? If you have EPA turn it down for your kids, that's what I do.

[papasmurf]

Ok so it's looking like my oldest lad (17) is going to convert my nitro hyper I have but "doesn't want the problem I have" his words not mine lol

He's got a sc8 esc but wants a budget (cheep) motor

Any recommendations??

I was looking at the hobbywing but not sure if he should stick with 1900kv like mine or not

Will also run on 4s like mine

Rob