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Old 11-09-2001, 09:46 AM   #181
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In theory the extra shrink will heat up the cells a bit more. I can do a test and post the results later. I don't think it really hurts anything to put shrink on the cells especially if you use thin shrink.

I would set the peak detect at .01-.02 for the micro packs. Maybe the pack had charge in it. It should take close to an hour at 1 amp to charge if they are real 1100's.
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Old 11-09-2001, 10:08 PM   #182
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Danny:

Hi, I have question for you about the SMH cells. A team driver at our track has some that he runs Mod with. he uses a older Novak charger (DigiPeak I think) to charge them. last Sunday he would charge a pack up on the Turbo 30 and I would always check the mah's when they were done. in pack would have a really high mah number then a lower one the 2nd time I charged it and then a higher number the last time I charged it. is it normal for SMH cells to vary from charge to charge????? ( I think there was a 500mah difference between the 1st and 2nd numbers)

Thanks for your time

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Old 11-10-2001, 04:02 AM   #183
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Sounds like they weren't discharged fully.

Should finally get to try my HV's this weekend.
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Old 11-10-2001, 08:01 AM   #184
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Quote:
Originally posted by Danny/SMC
mike webb: It's hard to judge mAh by what the charger is telling you.

If you take to packs with 360 seconds @ 30 amps which equals 3000 mAh. The pack with the lower internal resistance in milliohms will take less time to charge so your charger will give a lower mAh reading. The only true way to get a mAh reading is to do a constant load discharge.

This is why I never pay attention to what my Pitbull is giving for mAh.
Fakk2 - Danny posted that a little while ago. That should answer your question.
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Old 11-10-2001, 08:47 AM   #185
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Troy:

Thanks,

I kinda posted after working 14 hr day and never really took the time to reread all the posts. DOH................. and BTW, thanks for running a great forum. I will be around more often.


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Old 11-10-2001, 09:49 AM   #186
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The IR of the pack has something to do with how easily it will charge. Another thing to note is that different chargers will charge at different rates even if they are set equally. I have 2 matchers that charge 75-100 seconds faster than my other ones and they are all set at the same amp rate.


Racers are reporting that NiMH's pack are stronger on the track the second run. This has to equate to lower Actual IR and an increase in voltage. If this is the case the pack will take less time to charge because of the lower IR.

Yesterday I cycled a pack that I used last week. The first cyle the pack had an Actual IR of 24.6 and 3 hours later it cycled out to a 23.9 with .02 more voltage. I didn't pay attention to charge time but I'm pretty sure it would of been less than the first cycle.

Last edited by Danny/SMC; 11-10-2001 at 09:58 AM.
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Old 11-10-2001, 10:46 AM   #187
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Quote:
Originally posted by Fakk2
Troy:

Thanks,

I kinda posted after working 14 hr day and never really took the time to reread all the posts. DOH................. and BTW, thanks for running a great forum. I will be around more often.


Fakk2
No problem.

Shane ( futureal ) is the one who runs everything, and he does a great job.

Glad you like it though
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Old 11-10-2001, 01:12 PM   #188
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Troy:

I saw that after I posted..... I really think I should sleep before I post..... but then I'd never post. I really do like this place. I'l try to log on from my cell phone from work to see if I can get here more often.

Thanks

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Old 11-13-2001, 11:23 AM   #189
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Danny- What discharge tray do you recommend for the 300HV's?
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Old 11-13-2001, 11:41 AM   #190
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So far it seems like a tray with diodes does the best job if you don't plan on deadshorting. It seems like the runtime doesn't drop as much. If you plan on deadshorting I would use a tray that brings down each cell in the millivolts.
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Old 11-13-2001, 01:05 PM   #191
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Danny,
i sent you a private messages a few dyas ago....dit you get it?..
please check your PM inbox
thanks!
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Old 11-13-2001, 01:33 PM   #192
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Default S3000HV vs. P3000SMH

Danny,

What do you think about using the "IR" as a determing factor for
investing in either the S3000HV or P3000SMH cells for stock TC racing? From what I have seen the "IR" on the P3000SMH cells tends to be lower. Thanks...
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Old 11-13-2001, 01:40 PM   #193
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Are you talking about Relative Ir or Actual IR ? The relative IR is higher on the HV's because of it's cell construction it peaks at a higher voltage than SMH's.

The Actual IR is similar to the SMH's which is what really counts plus our tests have shown that the HV's are slightly faster on the track where it really counts. Remember machines are good tools to give us info but the track is the ultimate test.
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Old 11-13-2001, 01:46 PM   #194
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I am referring to the actual ir, I agree with you, the track is the ultimate test. Thanks...
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Last edited by Fred Hubbard; 12-29-2001 at 09:31 PM.
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Old 11-13-2001, 01:53 PM   #195
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SMH's range from 3.2-3.8 and HV's range from 3.3-4.0 so they are very similar. Also when you build a pack of HV's the A-IR will be closer to the label than a pack of SMH. Example a 3.2 SMH will cycle out at 13.9 per pack in a 4 cell configuartion which is 3.48 per cell. A 3.4 HV will cycle out at 13.9. This is in part because of the cell construction of the HV and the way we match.
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