zxracing

iTrader: (1)

Glad to hear they ran well for you. Let me know how they do next week against the higher end batteries

mike_Webb

John

Sent you a e-mail. Let me know if you get it. I had to rebuild my Mail Server when I got home so I want to make sure it is working.

Thanks.

Mike Webb

fatdoggy

Ran this weekend, the cells felt flat for two runs until I switched from 6amps 3mv to 7 amp and 5mv cutoff, then they were awsome! I managed to take 1st in the stock A-main(most of the fast guys were in 19t). Had a blast.

Cheers.

mike_Webb

Fat Doggy-

What I found this weekend was charging the cells at 6amps and a 60mv cuttoff. I had a temp gun and when charging at 6amps with a 50mv cuttoff the cells would peak at 120 degreese. I was peaking with about 3800MAH in the pack. Bumped it up to 60mv and the packs peaked at 145 degrees 3950MAH and had a lot of punch throughout the run.

30mv at 6amps is not enough. You may want to try at least 6amps at 50mv too.

The Track I was at was kind of cool so that is the reason for bumping up the cutoff. if it was 90 degrees out I would do 50mv or even 40mv.

Mike Webb

JusBox

iTrader: (1)

Good numbers, I just cycled a zx pack to around 3600 but at 5 amps and at 40mv. They are really strong cells, i'm glad I picked a few packs up.

fatdoggy

mike_Webb - Thanks for the tips. I'll try 6amps at 50mv next time I race and then 60mv if needed.

Question - Are there any ill effects of not fully discharging/equalizing them before re-charging to use in a later race in the same day? After a race day I dump and equalize them and let them sit till the next race day.

mike_Webb

The Only Ill effects are that your packs may have a cell or two that peak before the others. Not really that big of a deal. What I do is at the start of the day I will put all my packs on a Integy Discharge Tray that takes each cell to 0. I leave it on the tray for about 15-20min. Then I take them off and run the pack once for practice. Then I discharge the pack to 5.4 volts and let it rest for about 1-2 hours. Then I Charge the packs as needed for the Qualifier and Mains... After they are done for the day again I take it down to 5.4volts and leave them for the next week. So I tray them once.

I am going to get a Rayspeed Discharger. 2 settings. Condition and Equalize. So I will equalize the pack before I charge them for the first time that day racing and then after that I will Condition them. I am not 100% sure but I think the Conditioning takes each cell down to .9 on NIMH mode and .1 on Nicad Mode.

fatdoggy

Cool, I'll give that method a shot and see how it works out.

Cheers.