What is the best heatsink?

[Zephyranthes]

What is the best heatsink out of the Bit Racer ones? They can fit on BCG's. Is it the silver one, brown coated, or curved? What I mean is best is what disapates the most heat.

Use the one you think looks coolest and that works best at what it is intended for: holding in the motor!

I like the dark ones (brn/blk?) on my cars, they look cooler than stock chrome clips. You can always paint, or color it with a sharpie.
I just tried a blue sharpie on a chrome one, and it's not bad, almost anodized looking (kinda)

But that tiny little bit of contact the motor makes to that clip doesn't even come close to how a real heat sink is supposed to work.

Those are motor clips, don't believe the hype.

With these multi cell mods, however, I see a need for REAL heatsinks to help keep these little motors from burning up their bushings! You can find posts here and there about experimenters burning these motors up when over-driving them.



I have considered taking a REAL finned heatsink and cutting it down to attach to a motor clip, sticking up out the rear opening of my skyline to give the appearance of a big major heatsink (or the need for one).
A purely "for looks" mod, but at least it's more fitting than a fake muffler. These are electric vehicles after all, but hey, that's just my thing. Room for lots of mods, right! heheh

[Zephyranthes]

The one I'm using right now is a sivler, curved one that touches about 1/3 of the motor. Is that heat sink any good? Oh yea, would coloring help it or worsen it at all?

The one that wraps is still not great as a heatsink. They just arent designed properly to be doing that job.

Call it what you want, they are only doing one job ultimately.

Coloring it with a Sharpie or paint isn't going to change what ain't there to begin with!
It will make it look cooler though!

[PTink]

i have a little bone to pick. The little "motor clips" do act as a heat sink to disipate any heat that might accur from the motor. It serves as a heat sink because the clip draws heat away from the motor or whatever, hense the term heatsink. also correct me if im wrong, i think the bit motors are bushing-less.

Pick away!
But it's not a heat sink.

And the motors have to have some sort of bushing, if not actual bearings.

[Zephyranthes]

Hehe, my black "motor clip" is now black and looks really cool.

[PTink]

bahhhh, define heat sink, is is close to something that draws away heat from anything? because believe it or not some of the heat from the motor is drawn away due to the clip touching the motor, soooo yea.


*edit* i looked it up, "A protective device that absorbs and dissipates the excess heat generated by a system." according to the dictionary

[Zephyranthes]

Do you think wrapping the motor in foil would do the same thing? It would go around the whole motor so it should be better plus an extra heatsink clip.

Originally posted by PTink
bahhhh, define heat sink, is is close to something that draws away heat from anything? because believe it or not some of the heat from the motor is drawn away due to the clip touching the motor, soooo yea.


*edit* i looked it up, "A protective device that absorbs and dissipates the excess heat generated by a system." according to the dictionary

That's fine for your dictionary, but that's not addressing the issue. It's only defining the role of a heat sink.

These motor clips aren't heat sinks.

The clips are doing WAY more motor holding than heat dissapating on any given day.

And do these motors in stock vehicles really heat up? The answer is no.

You are being misled by a company who has everything to gain my "pumping up" the importance of stuff like this. That's how they sell you stuff.

Please tell me the exact temperature of your stock vehicle's motor when it's done a normal run and why this requires a heat sink?
Then explain why a piece supposedly designed as a heat sink makes contact with less than 2% of the body of the motor it's supposedly protecting from heat? Any "heat" transferred to these clips is accidental at best.
This is an extremely POOR design for a heat sink.

I'm sorry, but engineering wins out over hype. These are motor clips. Don't be misled!

Originally posted by Zephyranthes
Do you think wrapping the motor in foil would do the same thing? It would go around the whole motor so it should be better plus an extra heatsink clip.

For ghod's sake NO!

Don't believe the hype!

[PTink]

well, as an engineer would look at it... they would design the "heat sink"/ motor clip to draw heat off of the motor in any situation where this motor might be used. If you were an engineer would you make a bridge to hold 2 tons then put a holds two tons sign on it...no...you would make it hold 4 tons and put a holds 2 tons sign on it just so that it can compensate for whatever might happen. well, i think i have posted enough on this thread so i am just going to stop this pointless argument.

It is only pointless in that you haven't made your point.
In fact quite the opposite.

If the bridge in your example is slightly over engineered to handle a possible extreme, wouldn't that logic dictate that the clips would be over done as heatsinks to do the same?
I put it to you that their effectiveness and efficiency as heatsinks wasn't even considered by the designers because IT'S NOT A FACTOR. What IS a factor is manufacturing costs.

Using the term heatsinks was in all probability thought up by their marketing department.


My point from the beginning has been that calling these clips heat sinks is pseudo-tech BS the folks who make the cars are trying to push on people who don't know any better.

Those same folks would LOVE IT if you bought that KIT racer just for a supposedly better heat sink! IT MEANS YOU BOUGHT ANOTHER KIT RACER. GET IT?

As I said, just tell me the temp of your motor after a run, and how this calls for a heat sink.
(Stock vehicles only please, we're aware of heat issues with multi-cells mods.)
I have yet to see multi-cell modders taking on the task of re-designing these clips for better heat transfer, and necessity usually drives developments in stuff like this.

[Nathan]

Just run a kit racer once and touch it's heat sink. Kits auctually need these things, and they do dissipate heat (to a limited degree). Of course, the name stuck for bits, but they no longer dissipate heat.

[Zephyranthes]

I'm running a dual cell and have a spare triple cell. Would the motor clip help then?