are my motors gonna be ok

[Gregracer9223]

I know traxxas says it is ok to use 7-cell batteries but will they replace your mototrs if they burn up. Is it more likely to burn up your motors going at highter speeds? Should i cut out my windsield or back window for better air circulation or will it be fine untouched?

Greg

[Tervuren]

I don't think they would replace the motors enless they were defective.

[Gregracer9223]

can u guys answer my other questions

[arceeguy]

1: Traxxas won't replace your motors if you smoke 'em.

2: Yes, they are more likely to burn up on 14 cells than 12 cells.

3: Yes, cutting out the windshield and back window area will help keep them cool.

It is up to you to check the motor temps frequently and make sure they are not getting too hot. If they are too hot, then you should use smaller pinions to help keep them from meltdown. Driving conditions and driving style have alot to do with how hot the motors are going to get, so it is best to be careful and check temps yourself - rather than rely on someone elses gearing suggestions.

[Gregracer9223]

will that make the body weaker

[camra88]

the extra power or the slightly extra weight? I spose with higher speeds, you can jump higher... and if you land wrong... i suppose it would be harder on your body? the physical characteristics dont change when you put 7 cells in your maxx.

[Phantez]

i run 7 cells, and i was doing some crawling with my emaxx. After about maybe 30 mins of hard crawling, the motors just quit, i didnt know why. I knew the motors get hot when i do this, but man those suckers were TOASTIN'! They werent smoking or nuthin, but i let it cool for a while and tried it and it still runs fine, so i donno if they were affected or not, but im going to be putting on a computer fan to keep the temps down. WHen you're doing some rock crawling, the motors and ESC have almost no air flow to cool them down. Same thing happens in tall grass

[camra88]

Phantez:

Ill bet any money its was the EVX thermal shut down protection. If you drive slow (crawling) your ESC WILL heat up extrememly fast. the slower you drive, the hotter the ESC gets. (weird aint it?) I've done some slight rock climbing and crawling, and after just 10 minutes, i could roast eggs on the motors and the ESC. I was driving it maybe 1-2 MPH.

[Phantez]

i bet you're right. Im putting in a computer fan before my next crawl. I had one in there before and seemed to work good but i took it out when i had some need for speed and never bothered to put it back in

[rcmastermind]

the motors get hot weather or not you are crawling or going fast.

But if you are going really fast, the esc barely gets warm. Like when i ran a full gp3300 pair around my local track in 2nd gear at full throttle the whole time. Could barely even feel the warmth from it. The motors on the other hand, were a different story

[EMAXX4190]

i ran 7 cells most of the race season, and right at the end i relized that it wasnt worth toasting the motors all the time. 6 cells is just as fast on the track. i know traxxas says that you can run them on 7 cells, but i think they mean the evx and not the motors. i have gone though 3 sets of motors in one year. when you race its not all about top speed, its about who can get around the track the quickest, and the diference between 6 and 7 cells are barely notisable. when i first got my maxx i though it was fast, but after 2 weeks i wanted more speed so i went to 7 cells. it was alot faster for bashing around the house, but on the track, i think of it as more weight. so IMO i think that 7 cells are not worth it. and when you run high voltage gp packs, they will toast your motors all the time

[sevenfoot]

Originally posted by rcmastermind
the motors get hot weather or not you are crawling or going fast.

But if you are going really fast, the esc barely gets warm.

do you always contradict yourself so quickly?



Gregracer9223,
I'd buy a 16 pinions, and see what your temps are, if you can go up, good for you. Each Emaxx and ESC seem to have their own mind as to what pinion they want to run safely with.

[stampede720]

ESC's get hotter at lower speeds, because they are turning on/off several hundred (thousand?) times a second, vs. being on constanly at full throttle. Putting a fan on the ESC might help to keep it cool, but it doesn't take the strain off of it. I don't recommend an E-Maxx for crawling anyway, but gearing down is something you will need to do to prevent excessive strain.

Motors pull fewer amps when they are running a constant speed, ie. top speed. Motors run hotter at lower speeds, when you are almost constantly accelerating or decelerating.

do you always contradict yourself so quickly?

I don't see how he contradicted himself...he's just wrong.

[Phantez]

Originally posted by rcmastermind
the motors get hot weather or not you are crawling or going fast.

But if you are going really fast, the esc barely gets warm.

lol, hes both wrong and contradicted himself. I think Stampede720 is right, but it also has to do with air flow. WHen you're crawling at 2 mph, there is no air flowing over the electronics to cool them down. When you were going top speed constantly, you had a very strong, constant air flow over the heat sinks of you're esc, pulling all the heat out of it right away before it even started to heat up.

[rcmastermind]

how am i wrong? I said the motors will get hot no matter what what your driving style, but that the esc doesnt get very hot when you are going really fast.

I see how i contradicted myself, but i dont see how i am wrong

[stampede720]

Originally posted by rcmastermind
how am i wrong? I said the motors will get hot no matter what what your driving style, but that the esc doesnt get very hot when you are going really fast.

I see how i contradicted myself, but i dont see how i am wrong

The motors don't get to a constant heat and stay there every run. It fluctuates depending on driver, driving conditions, terrain, ambient temperature, humidity (maybe?), and runtime.

I still don't think you contradicted yourself.

I both agree/disagree about the airflow...unless you run without a body.

[rupert]

The more power the motors are putting out the hotter they will run . All else being equal of course. It is more of a function of the watts than anything else mentioned.

[stampede720]

Originally posted by rupert
The more power the motors are putting out the hotter they will run . All else being equal of course. It is more of a function of the watts than anything else mentioned.

Right. To add, motors pull more amps (use more power) to continuously accelerate and decelerate, then to stay at a constant speed, ie. top speed.

Originally posted by Gregracer9223
will that make the body weaker

Probably not enough to worry about. I would be more concerned about how it would look...