Using brakes = v hot motor

[mikeyscott]

Hi,

Is this normal as I'm having this issue with my SX, what's the best way of setting the ESC, introducing drag brake?

This is in a Cat SX with a 6.5 and SP GT, never got hot when I first had the SX with LRP Sphere and Losi motor.

[sosidge]

If you dial a lot of drag brake in to the ESC, it generates heat. As long as you are not overheating the motor and ESC to the point of losing performance (or failure), it's not a problem.

Drag brake is a personal thing. Lots of drag brake may feel confidence-inspiring on the track, but it probably isn't the fastest way around if you are shedding too much speed in the corners.

[mikeyscott]

Got drag brake set to 0 at the mo, but I use the brakes quite a bit and it's hot.

Don't need to it for confidence, just trying to solve heat issues

Even to the point of changing ESC at the mo

[Southwell]

Air flow plays a massive part, if you think your gearing is OK. Have you cut the back section out of the shell? As long as your arn't thermalling or unsoldering are you sure it's getting that hot?

[mikeyscott]

Originally Posted by Southwell

Air flow plays a massive part, if you think your gearing is OK. Have you cut the back section out of the shell? As long as your arn't thermalling or unsoldering are you sure it's getting that hot?

Shell is open on the front, but I haven't made a hole in the back yet. All the guys I spoke to with similar setups and cut shells don't get hot motors with SP gear and they aren't using the brakes.

SP motor will be moving to a FS shortly prob with a Novak GTB until I'm certain I like the K car.

Too hot to touch.

[stegger]

Mikey your not overlooking that your car maybe binding in the drive system somewhere ? I had this in my SX, but it could happen in any car.

[mikeyscott]

Originally Posted by stegger

Mikey your not overlooking that your car maybe binding in the drive system somewhere ? I had this in my SX, but it could happen in any car.

I will check, but I'm 99% sure it's free.

[RogerM]

Mikey, I run SP stuff in my FS and I gear the nuts off it ... yes it's hot but not as hot as yours sounds. I use a lot of brake but never really felt that to be a problem.

For the 6.5 in the FS I'd gear it on about a 22 or 23 against the kit 78 spur and see how that goes ... I run mine on 24 or 25 with the timing all the way up!

You might struggle to get the GTB (B for brick) under the shell on the FS, stick the SP stuff in ..... trust me, you'll never be taking it out again