Hey guys I am thinking about building a motor cooler using a cpu heatsink fan cooler. but many of the guys who build the motor coolers/freezers use peltier chips. But if I just want to start with the fan will it still cool the motor past ambient room tempature? I will eventualy get a peltier chip but I was just wanting to know if it will work without the chip when first staring out.

THAKS
Sean Scott

I was thinking the same.... also I want to take a chipset heatsink/fan (6000rpm) for an onboard cooler for the motor and esc mabey. Danny.

Yea I wanted to have a fan that went in my car while it was running but i decided that I was just going to cool the motor before and after a race and during the race I would just clip on a heat sink.

The fan and heatsink will only cool the motor to ambient. Those type of heatsinks are used to reduce the operating temp of a cpu.

Think it would be worth it to buy one just for cooling my motor post race or should I just get a heatsink and a fan. But I am already making an order to new egg so If anyone thinks its worth a try it will only cost me like 14 bucks. and if im not satisfied thats ok because I need a new cpu cooler anyways. so Ill just install it in my comp.

THANKS
Sean Scott

My opinion is that if the motor is so hot at the end of a run that you are concerned about damage just by having it cool naturally, it is probably too hot and you should make some changes to have it run cooler. That said, if ypu wanted it to cool a little faster so you don't burn your fingers working on it, you could just hook up an old computer power supply fan to a stick pack (or better, a 9.6V TX pack) and have it blow on the motor. That's what I use. And in hot weather, I point the fan at me!

lol whell see thats what I am trying to figure out what are acceptable motor temps. I have ben told that you need to be able to keep you finger on it without fear of being burnt. and I can do that but its kinda painfull. and I am not used to it. like I said in a diferent fourm when I used to race off road the motors would come off barely warm. now that I race with a xxx-s (cooling sucks in those cars) the motor runs much hotter. can someone tell me what acceptable temps are and how to find them (I would realy like it if you could tell me in deg fahrenheit) But the real rason I want to make a motor cooler Is becaus I am told that heat makes the magnets weeker over time so my theory is that the faster I can get the motor cool the longer the magnets will last. Also many people have ben building "motor freezers" and they look like a computer heat sink with a peltier chip on it. and these units get so cold they develope frost on themselves and the motor. so I am going to get the heatsink now and get a peltier chip later. The reason I want to build my own motor freezer is because 1. I can do It cheaper than buying one off of someone else. 2. the colder it is the higher the magnetic flux density. and if I can keep my motor colder at the start of the race I will have a more powerfull motor. and I will have a stronger motor at the end of the race because my magnetic flux has not faded as much as people who are running unaided motors.

THANKS
Sean Scott

Until you get the cooler assembled with the Peltier, there is nothing you can really do before each run. Well, that's not 100% true: you can get Freeze Spray and use it to cool the motor before each run.

I run 7 and 8 cell packs in some street bashers with stock or 19T motors. I have used a temp gun on them. Even with 8 cells, the most I ever saw was around 160 to 170 and that was only in warm weather. That was hot - too hot to hold my finger on. And you know what? The magnets didn't fade enough to make a difference. I've got a magnet meter and a zapper, and they didn't fade enough to make it worthwhile to pull the zapper off the shelf.

The latest [good] magnets in the Yokomo and Epic cans (FB-9s for the Epics) and not as succeptible to heat as the older magnets were. I could tell you this isn't worth your effort, but if you are like me, you are having fun planning and executing your project, so keep at it.

ta_man your exactly right. I think your like me you love building weekend projects. and things like that. so maby it is just to compfort me. oh whell it will make me feel better and make me go faster because i think it will. its a sugar pill for rc cars.


THANKS
Sean Scott