ever wonder what those different heatsinks/engine covers are used for from kit racers
 

according to the kit racer parts sheet thing:

the normal chrome one is used for high top speed and tight handling and control.

the brown coated one is for rapid acceleration.

the curved tighter fitting one is for long distance per charge.

don't ask me how this is, its what it says on the parts list thing it that comes in the package.

Hahah
Thats some bad americanized merchandise for you...
The shape or color of the heat sink wouldnt affect top speed, accelleration, control or distance at all.... lol
They just say that for the kids who dont know any better and just collect the parts like they're pokemon or beyblades... as if two different coloured top things with different pictures would be any different in terms of performance...

Heat sinks?

i beg to differ on your statement. the heat sink are there to help dissapate the heat produced by the motor. depending on how the heat sink is made will have an affect on how heat will be drawn away from the motor. and depending on how heat is dissapated will play a big factor in how the motor performs. for example if a certain heat sink can not draw heat away efficiently, then the motor will heat up and not perform at its best.

so i'm pretty sure the different heat sinks do something in terms of heat dissapation. each one might draw away heat better than each other.

Oh, I agree with you
However I don't think that top speed, accelleration, and especially control are effected my such small changes in heat dissipation...
I could be horribly wrong, but I think they're more cosmetic than anything

one of the heat sinks offered in the kit racers is a curved one that actually is rounded and wraps around half of the motor when closed. this particular heat sink was made to increase running time on the kit racers which i'm pretty sure would do so. this is because since the heatsink is touching half of the motor, then the heatsink is able to dissapate heat much better and in return keeping the motor alot cooler than the other heatsinks. so for this heat sink, it actually does serve a purpose other than looking nice.

i think the other heatsink that has a brown/black coating on it also dissaptes heat better then the original all chrome/metal one. since black or any dark color draws in heat very well, this would lead one to believe that the heat produced by the motor would be absorbed by the black/brown coating on the heat sink. a good real life example would be to look on the engine valve cover of..lets say... an acura integra gs-r. notice that the valve cover(which also acts as a heat sink) is coated in a black wrinkle paint finish to dissapate heat. imagine if it was chromed/polished, and after a hour of driving or so, that valve cover would be way too hot to touch.

Who sells these?
I have never honstly felt my motor afer a run, but a heatsink might look really cool, if nothing else!

your car already has a heatsink. its that chrome engine cover that you snap down to hold the engine in. that part acts as a heatsink.

you can get the different types of heat sink from the hot wheels kit racers. the black/brown coated heatsink can be found in the rpm package, while the curved one in the energi package.

IMO, they should just be called "motor retaining clips" because there is virtually no heat to dissipate. The 1/10 scale RC car motors can get hot enough to burn your hands, but from what I've seen so far, the BCG motors (and KIT racer) barely feel warm after several minutes of running.....

That is what I was wondering!
I ran my car twice in a row, from hard floor to carpet and back like a rally race, and I didn't detect any heat at all, in fact it felt cool to the touch!
I was thinking a heat sink would be a nice piece of "eye-candy".

i did a dual cell mod and with it the motor gets fairly warm. Without a heat sink i bet it could give ya a little burn. if u just hold the wires on the back of the motor while it is dual celled the wires get fraggen hot. Hot enough i couldnt hold on to them for very long.

I guess the need for the sink depends on how much heat the engine generates while under strain, and how much heat a particular engine can take before becoming damaged. Who knows, maybe these lil engines are more heat sensitive than the big ones.

As for color, darker colors retain heat because they absorb more light than lighter colors. Under the hood of a car, color makes no difference.

If you polished the intake of a car, you would be creating a smooth surface with less exposure to the air than say a bumpy porous surface (like most aluminum intake plenums)...which would in turn create a very hot surface. Which is to say the color of it would pretty much be pure asthetics.

All in all, my guess is the only damage done by lack of sink (if it works) would be so long term that it doesnt even matter.

Unless of course your modded =D

Hello all Im new to the forums and to bit charg cars.

I was thinking the differences in the K.I.T. motor retainers might have to do with the way the gears mesh. I have not had a chance to check the spacing between the pinion (gear on the motor shaft) and spur gears. But the different clips may affect how tight the gears mesh.

If the mesh is tighter it would make the car run faster (I think).

Any thoughts on this?

John

Actually, dark colors radiate heat better than lighter ones.

really? huh, thats interesting. So theoretically, simply dying...say plastic...could significantly change its heat transition properties?

*note to self, punch science teacher*

I put the brown one on my Bit Char-G. Doesn't seem to do anything. I think the different heat sinks are made of dfferent metals. Copper is the best. I don't know what each one is made of though.

Sounds reasonable.

well, if the mesh is tighter, the gears bind up a little and make the motor work harder...so as far as i can see the best way would be loose but not too loose, the way that creates the least resistance.

I got the Energi K.I.T. Racer. The curved heat sink looks rather cool. Some OEM cars have a curved heat sink, but they might not fit. My frind has one of those and it doesn't fit for his car is slightly longer so the heat sink is longer.

I got the RPM KIT Racer, and I love the dark coated heatsink!
It works perfectly and looks killer!
I don't see much difference between the motor and my Zip Zaps NOS motor though.

All of my Microsizers have these "custom" heatsinks in them.

I've noticed no difference. But I like the way the curved heatsink snugly holds the engine in place.

I think only the curved ones would provide any real additional cooling ability. Just makes sense, with more contact.

So instead of whipping out $$$ can I just whip out my sharpie marker?

the only way i think the heatsink would realy help is n an endurance race...an endurance race would kinda be stupid cuz u have to keep on charging like every 2 laps...if the heatsinks really made a diffrencs they should be made out of gold(like some engine parts of a mcleran f1)pure gold...first so they would take in the heat and second so i could be rich!!:D :D

Pretty much.
The only way you'd need it to act like a real heat sink is if real heat is being generated, like in a two or three battery mod.
With the minimal contact most make, I think they really should be called motor clips.

It does far more motor holding than heat dissapating on any given day!

agreed
 

Yes, I agree with strider. If I didn't have my "heatsink", my motor would not be held down!

God bless Amer...I mean Engine clips