hi my name is dan'cassidy. i have a stampede with a intellispeed 12t esc and i flash 12t quad motor. i notice that the motor gets really hot after a run. i have even reduced the pinion size and spur size. it is still hot. i don't know what is going on. could some who knows a solutions please let me know.

thanks

You should try only reducing the pinion or increasing the spur. Reducing both may have made it even worse.

Yes, by decreasing the size of both, you are not really decreasing the gear ratio. You should put the larger spur back on and try it again.

Also perform some motor maintenance, Take it out and clean it up with motor spray. If you know about motors take it apart and check it out, Brushes, Comm, Magnets (are they still glued into the can properly), and stuff like that. If you don't know much about motors, call a local Hobby Shop and see it they offer a motor maintenance service or know someone who would do it for you.

i am getting the motor rebuilt righ now and the kid who is doing it told me to go with a pinion spur ratio of like 81 spur and 19pinion. is this an ok ratio. i am running 19-78 right now. i noticed a huge speed loss. i ran 87 spur and 15 pinion and i could pull a wheelie on a 6 cell battery.

19/81 sounds OK, a 19/87 sounds even better. the 19/78 is overgeared.

thanks for the help i will order an 87tooth spur tonight.

Sort of depends on what tires you are running but generally speaking the rule of thumb is to run a pinion two teeth fewer than the motor turns (with the stock 87T spur). Generally that means that running anything hotter than a 13T motor is asking for troubles. If you run a large tire like the M2K it means smoke. Keep checking your motor temp. With today's high capacity batteries you can do some horrible damage to a motor in one pack if you are over geared.

i have a reedy flash 12T motor i run an 19/87 is this an ok setting?

I have not heard of anybody who ran a 12 turn motor successfully in a pede regardless of how low it is geared. At least not for a long time. The motor will get very hot and it wont last long. It will run REALLY REALLY fast right until the brushes and comm get smoked. If you want to do speed runs with it then you should be fine but don't expect to run it more than a couple minutes without letting it cool. And I would be very careful touching it!

If you really want to run that motor I would get a 90T spur and a 13T pinion and enjoy it. You will still find it way fast and fun but even then you are still pushing the gearing limit even if you are still running the stock tires. The smaller the tires the better the overall gearing will be for that motor.

Wow Chris, Where ya been? Long time no read!

Hiding...

Life has been real hectic with no r/c to be had at all for almost a year. I still lvoe the tech side though!

Right now I am preparing for an extended break from work- I got laid-off, so I may even have some time to break out the trucks again! While looking for somethign way better, of course. it is all good!

Hope you are doing well.

where to you find a 90tooth spur for the stampede. i can only fine the 87T from traxxas. please give me a link!!!

where to you find a 90tooth spur for the stampede. i can only fine the 87T from traxxas. please give me a link!!!

Here are a couple choices.
http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXD250&P=7

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXN204&P=7

90T is the largest you can go while still using the gear cover. If you want to skip that I THINK you can go as high as a 93T.

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXN205&P=7

Keep in mind that the choice of spur and pinion are just a simple ratio of the relative sizes. changing the size of a pinion has a much bigger effect than changing a spur. To make the gear lower (easier on the motor) you increaase the spur or decrease the pinion.

examples: going from a 20 tooth pinion to a 15 cuts your gearing by 25%.
That same change on a spur- going from an 85 to a 90 is only a 6% change!

You get more milage out of having a set of pinions to choose from than a few spur gear choices. You used to be able to get a set of 5 or 6 pinions- either even or odd tooth counts but I don't see them on the tower page any more.

Hope that helps.

you were right. i just fried my 12T motor today while running it. i had it out for maybe 3 mins and it lost a lot of speed. i pulled it up to me and the motor was smoking. i pulled it in and that was it. i am going to get a 15T motor. is that a good motor for a stampede.

With the right gearing it can be a great motor. Go for a 13 tooth pinion and you should be fine.

Sorry to hear about the 12. Hope it was fun while it lasted. You might still be able to resurrect it with a comm cut and some new brushes.

my friend cut the comm and he said that the com had been already cut before so that means that i got a ised motor when i bought it bout 2 months ago. i bought it and ran about 16 runs on it and it was f@&%ing dirty. it a nasty motor. im going to ge a venom 15T motor. my bro has a pede too and he has the 17T and he loves it.

I usually ran a Chameleon 2 19T motor and loved it but a 15 will be that much better. It WILL require more frequent comm cuts and new brushes but the extra power will be great. have the cuz cut the comm before you run it at all. Many times they come out of the box out of round. A quick cut and carefully break in the brushes and you will LOVE it.

I have since gone to brushless and although i cut my own comms I would never go back! (excpet when my son has stolen it for his XXX4...)

so as soon as i get it, get the comm cut.

how do you cut it. do u need a special tool to do it.

my friend did my 12T and he said that it was in very bad shape. i ran it as soon as i got it.
ill order a 15T and get it cut as soon as i get it.

You DO need a special tool. it is called a comm lathe. If your buddy cut it for you, he should have one. If not, I don't know what he used!

The basic idea is that the lathe makes it very round and smooth. By doing that carefully- just taking off enough to make sure it is true (round) you make sure that the brushes run smoothly on it. If it is out of round they can hop and that causes arcing which causes burning which causes wear...

Most hobby level drivers just run what they get from the shop but a racer would never trust the manufacturer to get it right. I have been blown away at how much more power you can get from a motor with a good comm cut, the right springs and brushes. In most cases- including yours, running it as you get it will work fine but they will last longer and run stronger if you take care to break them in. There is lots of info out there if you want to get into that but for bashing it isn't critical.

before i sent my motor to my friend it had pretty good torgue. it was alot more powerful than my old 14T quad. when i got it back from my friend, i was blown away too by how much more power i got out of it. he also did a racing secret to make it have more power. thanks for all the help.