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Electrical problems, need advice BAD!

Electrical problems, need advice BAD!

Old 02-29-2016, 11:16 AM
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10 minute mains on a 4wd SC is asking for problems. You guys are going to bounce off of the LVC a lot and worse off you're taking the packs all the way down on their capacity which will shorten their life over all.

The quick and easy way to test this is use the Rx8's data logging feature. Clear the log out for a fresh clean run, run the car until it stops as you mention. Review the data log. If your voltage is bouncing off of 6v and or lower, you're out of run time.
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Old 02-29-2016, 12:21 PM
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Thanks Randy, I'll do that. I'm not a big fan of 10 minute mains either but the owner of the track likes to run them because that's what they run at the bigger races around here (PNB, Wicked, etc.). Had the day off today so spent some time with it. Ran it as it was with the 7600 TS packs and got 9.5 minutes. Hooked up an external bec and got 9 minutes out of the second run with my other TS pack. However, the pack puffed and cracked so bye bye to that one. Lasted a year so I can't complain much with all the run time it's seen. Removed the bec and tried a SMC 7200 pack that I borrowed from a friend. Ran it for 11 minutes and still had juice. I'm beginning to think that I just needed a bigger pack and that the TS 7600 packs were just wearing down due to life/usage. Forgot to mention that the pack that puffed was 136 degrees when I took it out.

My radio is a 4PX. Thought about the reciever myself but I'm not quite convinced that's the problem.
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Old 02-29-2016, 12:25 PM
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Yeah 10 minute mains can be a marathon for a 4x4 SCT on 2S. A lot of it can be your driving style too.

If I had to do that, I would get the best packs I could find. Right now, I am really loving the VANT 8000mah lipos I have. 100C, 8000mah, and were $55 shipped each new.
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Old 02-29-2016, 12:31 PM
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Originally Posted by Cain View Post
Yeah 10 minute mains can be a marathon for a 4x4 SCT on 2S. A lot of it can be your driving style too.

If I had to do that, I would get the best packs I could find. Right now, I am really loving the VANT 8000mah lipos I have. 100C, 8000mah, and were $55 shipped each new.
Where did you find these, if you don't mind me asking?
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Old 02-29-2016, 12:53 PM
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Originally Posted by 450rdawg View Post
Where did you find these, if you don't mind me asking?
Dirtcheaprc.com has the Vant packs. I run a couple of their 4 cell packs and have had good luck with them.
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Old 02-29-2016, 12:54 PM
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Originally Posted by 450rdawg View Post

My radio is a 4PX. Thought about the reciever myself but I'm not quite convinced that's the problem.
You all need to know that on the 4px you need to turn off a setting when using an ESC. It's in the book and I can't recall the name right now. I believe it's the BLS setting needs to be turned off on CH 2.

Also make sure your trigger ratio is 70/30, not 50/50 which is default for some odd reason.
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Old 02-29-2016, 12:56 PM
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Originally Posted by Randy_Pike View Post
You all need to know that on the 4px you need to turn off a setting when using an ESC. It's in the book and I can't recall the name right now. I believe it's the BLS setting needs to be turned off on CH 2.


Also make sure your trigger ratio is 70/30, not 50/50 which is default for some odd reason.
Will do, thanks for the advice.
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Old 02-29-2016, 12:56 PM
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Originally Posted by MX304 View Post
Dirtcheaprc.com has the Vant packs. I run a couple of their 4 cell packs and have had good luck with them.
Cool, thanks.
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Old 02-29-2016, 04:10 PM
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Originally Posted by Randy_Pike View Post
You all need to know that on the 4px you need to turn off a setting when using an ESC. It's in the book and I can't recall the name right now. I believe it's the BLS setting needs to be turned off on CH 2.


Also make sure your trigger ratio is 70/30, not 50/50 which is default for some odd reason.
Just went through the whole manual and the only thing I can find in relation to BLS is in reference to running a brushless or analog servo.
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Old 02-29-2016, 04:53 PM
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Originally Posted by 450rdawg View Post
Where did you find these, if you don't mind me asking?
I got it here:

http://atomicmods.com/vant-battery-7...ns-connectors/

Also, give promatch a jingle and see what they can do for ya.
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Old 02-29-2016, 05:02 PM
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http://www.promatchracing.com/prodde...rod=2s8000100c
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Old 02-29-2016, 05:52 PM
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Originally Posted by 450rdawg View Post
Just went through the whole manual and the only thing I can find in relation to BLS is in reference to running a brushless or analog servo.
That's it. Make sure your throttle (channel 2) is set to analog.
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Old 02-29-2016, 06:39 PM
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Originally Posted by 450rdawg View Post
Just went through the whole manual and the only thing I can find in relation to BLS is in reference to running a brushless or analog servo.
Yup, BLS is only for BLS servos. If you look at the older 4pkR radio is states not to be used on esc's.
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Old 02-29-2016, 08:10 PM
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Originally Posted by Randy_Pike View Post
Yup, BLS is only for BLS servos. If you look at the older 4pkR radio is states not to be used on esc's.
Gotcha. I didn't see a way to set that on individual channels, only where you select the type of reciever you're running. I'll dig into it a little more tomorrow. My radio is in my trailer and it's getting late here in GA. You coming to Wicked this year?
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