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What do you think? Keep or sell?
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A RC Dude
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What do you think? Keep or sell? - 05.31.2009, 02:35 PM

Ok, I just had my 3rd MM ESC to mess up on me in my rustler and this is my 2nd or 3rd motor that i'm on now. I've had 2 LiPo's go bad in that car (not doing anything wrong. thay've never gotten hot, their voltage never got too low untill a cell started going bad, i've never touched + to -, i've always stored them at around 6.5-6.8v, and haven't abused them in any way). My rustler is just a very unreliable car for me. The past year i haven't gotten but one full charge threw it without something messing up (it's usually the electronics). So i'm tired of it, my e-maxx runs much better so far and it needs new batts and diffs so i'm really thinking of sending the MM stuff back, fixing/replacing it, selling it, selling the electronic, and then selling the rustler as a roller to get money out of it to fix my e-maxx or to get a mini e-revo to replace it. I bet the e-revo will run much better and be more reliable.

So what do you guys think i should do?


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nitrostarter
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05.31.2009, 02:58 PM

What is your setup in the rustler? The MM should be able to handle it easily! What electronics and all are you running? Something sounds fishy....


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lincpimp
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05.31.2009, 03:01 PM

Bad servo? It may be overworking the MM bec?

I have had great success with MM escs, probably had 10-12 of them and they have held up to almost everything that I could throw at them (save for a 7xl on 5s...)
   
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05.31.2009, 09:04 PM

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Originally Posted by lincpimp View Post
Bad servo? It may be overworking the MM bec?

I have had great success with MM escs, probably had 10-12 of them and they have held up to almost everything that I could throw at them (save for a 7xl on 5s...)
Servo's just fine. and i have the MM bec disabled to reduce heat and get the servo to move faster.

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What is your setup in the rustler? The MM should be able to handle it easily! What electronics and all are you running? Something sounds fishy....
My gearing is 15/90 and temps haven't been very high. my first MM ESC hit 250 a couple times and the motor hit 230 a few times as well and nothing ever happened. it ran at those temps for a couple months before i got the FLM tranny case and got the temps down a lot. after that it ran for about another year before the ESC went out. got a new ESC and it ran for about half a year before the motor failed out of noware and in return the ESC went with it. i got the motor and ESC replaced at the end of last summer and it's run well since them, even with 2 trackpowers and a 9xl in my maxx. the water damage to the stock reciever mad me replace it with a futaba receiver and it ran fine with that setup for a wile and then just now went out again


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What's_nitro?
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05.31.2009, 09:10 PM

The first time the motor went over 200* it was dead and/or dying. It was all downhill from there. Was the 9XL in the Rustler? Sounds like it was wayyy underloaded and BL doesn't run efficiently with little/no load on it.

Last edited by What's_nitro?; 05.31.2009 at 09:12 PM.
   
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05.31.2009, 09:41 PM

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Originally Posted by What's_nitro? View Post
The first time the motor went over 200* it was dead and/or dying. It was all downhill from there. Was the 9XL in the Rustler? Sounds like it was wayyy underloaded and BL doesn't run efficiently with little/no load on it.
no, the 9xl was in my e-maxx for a little wile before i got the MMM


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What's_nitro?
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05.31.2009, 10:37 PM

Ahhh. Then what motor was in there? I don't see it in your other posts...?

Last edited by What's_nitro?; 05.31.2009 at 10:38 PM.
   
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05.31.2009, 10:59 PM

my rustler has a 7700kv motor in it


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What's_nitro?
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05.31.2009, 11:04 PM

I think you're geared too slow on that motor. You're at ~40mph with 50K rpm. I think if you switched to the 5700 or even the 4600 and re-geared for 40mph it would run much better. That or throw a 25T pinion on there and get used to driving 70mph. At least it would run cooler!

Last edited by What's_nitro?; 05.31.2009 at 11:06 PM.
   
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06.01.2009, 04:25 PM

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I think you're geared too slow on that motor. You're at ~40mph with 50K rpm. I think if you switched to the 5700 or even the 4600 and re-geared for 40mph it would run much better. That or throw a 25T pinion on there and get used to driving 70mph. At least it would run cooler!
geared any higher than 15/90, the ESC starts to run very hot! when the ESC hit 250, it was geared at 19/90 with a cutout on the body to move air over it to cool it down


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nitrostarter
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06.01.2009, 04:29 PM

I would ditch the 7700kv for the 5700kv or 4600kv like previously stated. Both motors will run cooler and be easier on the system while still allowing a 3s for some higher speed runs if wanted.


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ClodMaxx
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06.01.2009, 04:43 PM

i would keep it. toss it in a closet and close the door for a while, and come back to it later. you won't get anywhere close to what you put into it if you part it out, and it may be a fun 'project' car someday when you're more objective about it.

i've regretting selling a handful of cars... including a $2500 SuperMaxx and a $2000+ crawler. seemed like a good idea at the time, but i should've kept them.


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06.01.2009, 08:35 PM

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i would keep it. toss it in a closet and close the door for a while, and come back to it later. you won't get anywhere close to what you put into it if you part it out, and it may be a fun 'project' car someday when you're more objective about it.

i've regretting selling a handful of cars... including a $2500 SuperMaxx and a $2000+ crawler. seemed like a good idea at the time, but i should've kept them.
my rustler hasn't been ran since december becouse i had it's battery to go out. My e-maxx hasn't been run for a few months eather becouse diffs, battery, and i had to get a 2.4ghz radio system for it so it wouldn't clitch and shred everything in the drivetrain but going 100% foward to 100% backward to 100% forard again in a few miliseconds.

besides, my e-maxx is more powerfull, a lot better off road, can take a bigger hit(all rpm arms and FLM bulks/chassis), goes just a tad faster, and can do a backflip from a standstill. the one thing the rustler does better is turn and not flip(witch the maxx can flip itself back over by hitting gas/brake/gas/brake). as far as money, i should be able to but a new e-revo vxl for the same as the rustler should sell for. i'm a club member at tower so i can get the e-revo for 240 and a new MM 7700kv cambo goes for 200 (posibly minus a lil to fix/replace it from castle) and then shurly i could get more than the rest of the money for selling the car.


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ClodMaxx
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06.01.2009, 09:01 PM

sounds like your mind is made up... why would you come on here asking for advice?


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A RC Dude
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06.02.2009, 05:32 PM

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sounds like your mind is made up... why would you come on here asking for advice?
to see what everybody elts thingk. my mind wasn't that made up when i first posted it anyway. now tho i've given it a bit of thought


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