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11-02-2007, 12:45 PM
| #1 |
| Newbie Join Date: Oct 2007 Location: Phoenix
Posts: 36
|  We are in the trust tree, are we not?
ok, so just getting thru the first stage of building a wk rock crawler. I extended the wheel base changed out the gearing but I got a new battery also based on the sugestion of someone else. I bought the Orion 3900mah, I have noticed that running this battery makes the ESC extremely hot and the truck will actually stop running. Too much battery not a good enough ESC?
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11-02-2007, 01:03 PM
| #2 |
| I wanna be Dave Join Date: May 2006 Location: FOUR 8 OH
Posts: 4,913
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Its not the battery, the stock ESC is total crap for crawling. You deffinitely want to look into replacing it with something better.
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11-02-2007, 01:26 PM
| #3 | |
| PapaGriz Yo   Join Date: Apr 2004 Location: In the garage building the wife a crawler
Posts: 13,137
| Quote:
battery voltage, steering setup, gearing. Unless you changed the voltage of your battery to something higher (8.4V, 9.6V, etc), that shouldn't have any effect on your ESC. It sounds like you changed the gearing at the same time as the battery. What was the gearing before and what is it now? Last edited by Grizzly4x4; 11-02-2007 at 01:29 PM. | |
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11-02-2007, 01:43 PM
| #4 | |
| I wanna be Dave Join Date: May 2006 Location: Arlington, VA
Posts: 3,377
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11-02-2007, 01:57 PM
| #5 |
| Newbie Join Date: Oct 2007 Location: Phoenix
Posts: 36
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It was completely stock WK and changed out the gearing with a 96t spur and 15t pinion. Basically just followed the HPI stage 1 build http://www.hpiracing.com/news/2007061801.html then I added the new battery which is still a 7.2. Money is not a concern, I guess just guidence on which route should I take to fix the heat issue? |
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11-02-2007, 02:15 PM
| #6 |
| PapaGriz Yo Join Date: Apr 2004 Location: In the garage building the wife a crawler
Posts: 13,137
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If you put the old battery back in it doesn't run hot? With the new battery does it get hot right away or after crawling for a while. Since you get more crawling time with the new battery maybe the heat is building up and causing it to shut down. I had that problem with my Mamba25 on 11.1V with a Revolver Black. In a competition I never had any problems. But if I took it out to fun crawl with it, the ESC would overheat and thermal shut down after about 10 minutes, in a competition it never runs for more than 5 minutes at a time. There are two paths you can take to upgrade. -Buy a new ESC -Buy a new motor Most likely the 27T motor is making the ESC work really hard. My advice would be to upgrade the motor to a 45T-55T. If money is no object then upgrade the ESC at the same time. |
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11-02-2007, 02:23 PM
| #7 |
| Newbie Join Date: Oct 2007 Location: Phoenix
Posts: 36
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Yes it is only occurring with the bigger battery, I will go pick up a new motor and see how that goes. Wanted to go for a bigger motor and better esc anyways.
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