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Old 06-06-2004, 03:32 AM   #1
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Lightbulb Dead Shorting... again...

Hello All

sounds like dead shorting is now the official way to store the latest GP3300 if you don't care about loosing runtime (I don't)... could somebody please sum up what are the recommended latest and greatest discharging/charging techniques, timings, and tools on the latest shorty cells?

On my side, I'd like to give this method a try... My discharger (rayspeed) has a setup with .1V/cell cutoff and low discharge current (1A, I doubt it's that much at the end of the discharge since it's only resistors in there). Will it be enough to dead short, or does it still leave too much energy in the cell, which will generate nice sparkle when I hook up the + and - ?

Thanks all,
Later
Paul
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Old 06-06-2004, 09:46 AM   #2
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Lonestar
If you remember back then the 2400 nicad batteries will generate power after discharge done and the is why racer dead short the batteries and plus you get more voltage. Now the 3300 batteries is difference those batteries will dicharge is self after discharge done( they don't regenerate )
Yes you can dead short the batteries after discharger and it won't spark much to worry
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Old 06-06-2004, 12:25 PM   #3
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There is already another thread regarding the same topic.
I already bump it up.
Good luck.
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Old 06-06-2004, 01:22 PM   #4
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Gold Peak GP3300SCHR NiMH

Charge:

We have been using a linear 6 amp charge rate with very good results. For maximum performance try to get your pack peak just before your race. If it has been sitting for awhile repeak with the same setup as the initial charge. If it's been sitting for 5 minutes or less repeak it with a .01( 10 mv ) peak detect.

Peak detect ( voltage threshold ):
-We use a .05 ( 50 mv ) for 6 cell packs.
-We use a .03 ( 30mv ) for 4 cell packs.

Discharge & Storage:

After the race discharge the pack down to .90 volts per cell. This equals to 5.40 ( 6 cell ) or 3.60 ( 4 cell ). Let the pack rest until the next time you plan on using them. Don't put them on a tray.

Cycling:

We are under the conclusion that cycling these cells brings no benefit other then determining if your pack has fallen off.

New charging updates for GP 3300ís

SMC is really growing at a rapid pace and we will continue to keep the best quality possible. We will not sacrifice quality even though we are producing higher amounts of cells.I have been testing many methods of setting up my matchers in the past 6 months or so. Here is the latest care info that we have been using on the newer high voltage GP's.1: After a run discharge the pack down to 3.6 (4 cell) and 5.4 (6 cell) let it rest until the next time you plan on using it.

Before you go to charge it put the pack on a pure resistor (no diodes) use a tray such as the Integy Indi Octane 2, for 2-3 minutes and then charge it.

This will improve the runtime by a few seconds and keep the voltage and AIR in good shape.

2: For those who aren't concerned about capacity you can use the following method

After a run discharge the pack down to 3.6 (4 cell) and 5.4 (6 cell) and then place it on the resistor only tray for 5 minutes or so then short the pack and store it shorted until the next time you plan on using it.

If you run your pack a second time in one day you should put it on the resistor only tray for 45 - 60 minutes and then let it rest until you are ready to use it again

This method will drop the runtime by 20-25 seconds but will increase the average voltage and may reduce the AIR.
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Old 06-06-2004, 01:26 PM   #5
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Thanks all for the info.

Sorry, I didn't see there was another thread...

Admin, could you please lock this thread? Thanks!
Paul
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Old 06-06-2004, 03:59 PM   #6
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if u run mod do not dead short.. but if u run stock or 19t do it... in oval at least 90% of the racers do.. and u do notice the difference.. it makes the pack hold higher number longer.. by not traying them the will lose voltage, and internal resistance will go up...

trust me dead shorting is the way to go.. i know im no one to say.. but i am very good frindes with the battery matcher for TEAM ONE cells.... and they recomand it... all of our team packs for big races are dead shorted.. unless we run mod...


when u dead short it is recomended to discharge them down to zero... if u are worried about to much voltage l;eft in the pack u can do this

tray the pack and hook up a voltmeter to the pack.. when it stops draining .... take a piece of very thin solder and use that as your dead short wire... always dead short the pack before u pull it off the tray.... they will regain voltage.... the thin solder will pop and act as a fuse if the pack spikes back up...


team one has many natiopnal champs, and made the a main at every oval race last year and also at most touring races... i think they know what they are talking about .... i trust them
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Old 06-20-2004, 10:40 AM   #7
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Default Gp3300 temperature

Does anyone knows what is the max temp when charging the gp3300?
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Old 06-20-2004, 05:29 PM   #8
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Default 125 to 150 Right off the charger

It depends on who you ask. Check with the Big matchers like SMC, FU and Promatch. They all have a battery care section.
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Old 06-20-2004, 08:04 PM   #9
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are nimh's(3300gp) more powerful in the second charge? and what charge rate for a 5 min mod race? (non matched stock cells)
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Old 06-21-2004, 05:28 AM   #10
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lonestar, you can get the rayspeed to bring your cells down to zero. just stick with the 5A discharge and tape the button down and use a voltimeter to see when the pack is 0,00V and then just wire the pack and remove it from the discharger.
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Old 06-21-2004, 06:27 AM   #11
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Quote:
Originally posted by jarkkom
lonestar, you can get the rayspeed to bring your cells down to zero. just stick with the 5A discharge and tape the button down and use a voltimeter to see when the pack is 0,00V and then just wire the pack and remove it from the discharger.
jarkom.... I can't believe I didn't think about it myself...

You're so absolutely right!!! thansk a lot!

Paul
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