Mamba Max Overheat Issues

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Dunk - 20 Nov 2006 09:46 GMT

I have a mamba max ESC and 5700 CMS engine from
Http://www.castlecreations.com which is installed into a traxxas
rustler. The rustler has very little stock parts remaining... most of
it is now Fast Lane Machine aluminum. The brushless motor tho...
overheats within a 5 or 6 min run. I have a 3s Lipo pack, 15 tooth
pinion, 86 tooth spur...

any suggestions on how to keep this cool so I don't have to replace my
engine every week or so?

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Richard - 20 Nov 2006 17:33 GMT

> I have a mamba max ESC and 5700 CMS engine from
> Http://www.castlecreations.com which is installed into a traxxas
[quoted text clipped - 5 lines]
> any suggestions on how to keep this cool so I don't have to replace my
> engine every week or so?

What tyres you running? The gearing sounds about right for this brushless
setup if your using close stock diameter tyres.

What 3S capacity are you running? To low and it could cause excessive heat
build up.

Does it still heat up with a 2S or a 6 cell pack?

What timing, punch control and voltage cut-off have you got set in the esc?
Try reducing the timing and punch control and turn off the drag brake.

What surface are you running on when it heats up, loose surfaces and
continous speed can cause excessive heat build up.

Unfortunately I dont think the Mamba Max is up to the standard of Novak with
their brushlees car motors. The speed controllers are top stuff but I have
heard of way to many people complaining about cooking the motors with 3S
packs.

Cheers

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Dunk - 20 Nov 2006 19:03 GMT

>What tyres you running? The gearing sounds about right for this brushless
>setup if your using close stock diameter tyres.

2.2 diam Pro Line dirt hawg's, on RC-Parts rims.

>What 3S capacity are you running? To low and it could cause excessive heat
>build up.

6000 mah 3s Lipo.

>Does it still heat up with a 2S or a 6 cell pack?

no 2s pack to test, 6 cell pack did make engine warm...

>What timing, punch control and voltage cut-off have you got set in the esc?
>Try reducing the timing and punch control and turn off the drag brake.

low setting on timing, 0 punch control, 9v cutoff. drag brake has been
off.

>What surface are you running on when it heats up, loose surfaces and
>continous speed can cause excessive heat build up.

mix between concrete and low grass/dirt.

>Unfortunately I dont think the Mamba Max is up to the standard of Novak with
>their brushlees car motors. The speed controllers are top stuff but I have
>heard of way to many people complaining about cooking the motors with 3S
>packs.

ya, I am seriously considering looking towards different engines...
other forums I post too give me the same informations. Castle really
bragged up these 1/10th scale demons...

>Cheers

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Richard - 20 Nov 2006 19:23 GMT

> >What tyres you running? The gearing sounds about right for this brushless
> >setup if your using close stock diameter tyres.
[quoted text clipped - 30 lines]
> bragged up these 1/10th scale demons...
> >Cheers

BTW- Is the speed controller shutting down at all when the motor heats up?

Do you have any temp readings from the motor? I think the CC site
recommends no more than 200 degree's.

Have you read the Max Tuning Guide on the CC web site, that might help you
with a little info. Apart from this I would recommend contacting CC and see
what they can suggest. If at worse they should offer to replace the motor
for free.

If all else fails you could always toss the motor in the bin and stick a
brushed motor in there with the Max controller.

Cheers

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Model Forum / Radio Controlled / Land Models / November 2006

Mamba Max Overheat Issues