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Old 04-17-2006, 06:39 PM   #1
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Default Charging a Epic 3000 pack

At what amp should i charge an Epic 3000 pack at for an 8 minute main? It needs to last and be done in about 20 minutes.
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Old 04-17-2006, 08:51 PM   #2
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In order to charge a 3000 mah battery in 20 minutes your gonna have to be charging that thing at 9 amps which is way to high and wont give you 8 minutes of runtime.You didnt specify what class or kind of motor so you definitly need to be more specific.
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Old 04-18-2006, 04:22 AM   #3
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Sry. Cooper class with stock silver-can motor. I think times between heats is 20-30 minutes. of free time.
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Old 04-18-2006, 10:58 AM   #4
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Hmmm, I say charge your packs before hand so all you have to do in that 20-30 minutes is repeak em and marshal .
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Old 04-18-2006, 11:51 AM   #5
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To last an 8min race, the best way it to charge at a low rate. I'd hit those suckers @ 5amps maybe 4.5 if you still can't make time.

I'd also get atleast a total of 3 packs. Then get another charger.

2 chargers and 3 pack = one pack is always ready in the car and the remaining 2 are either discharging or peaking.

What I usually do is charge the nite before and then practice threw each pack, let them cool, discharge then peak for the quals then keeping the best pack for the main.

Another step would be to charge at the track; that would mean getting to the track setup to your pit space discharge 2 packs at a time then charge both at a time. When the first pack peaks pull it off and then start to discharge/peak the next pack. Pratice with that freshly peaked pack, once finished let it and the motor rest. Once either pack or motor is cool start the process over again.
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Old 04-18-2006, 01:23 PM   #6
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well, what i can do, i have a 1900 and 2 1800's for practice and quals. So when they done i can take the 3000 on and off until it gets a full charge.
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Old 04-18-2006, 02:18 PM   #7
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what do you mean off and on?

from what you have I'd do this

charge all 4 packs 2x1800's 1900 and 3000 packs the day or nite before

come to the track setup and burn though the packs atleast once (starting with the weakest 1800 pack then working your way to the 3000)

once the last 1st pack is done let both motor and cells cool then discharge/start peaking that 1st pack this will be your 1st Qual pack to run

continue this process till you reached the 3000 pack which should be now ready for the Main

9am setup
9:15 Step 1: start pratice with crappest 1800 pack
9:23 Step 2: pull car and pack off the track let both motor and cells cool
9:30 Step 3: Start Discharge on 1st pack (shouldn't last too long say 1-2 mins) then Begin Charging. While charging start on pack #2
9:38: Return to Step 2
9:45: Begin Step 3. If the 1st pack isn't done charging, simply wait till it is then begin with discharge/charge of pack #2

Just repeat that and you should be all set. the last pack you'll be charging that day will be the 3000's will take the longest so make sure you begin that charge atleast 45min before the main so that you'll have your Best pack ready to lay down some rubber.

For charging the different packs I would recomend

1800's packs charged @ 3amps
1900 pack charged @ 3amps
3000 pack charged @ 5amps

I'm asuming the 1800's and 1900's are NiCads if your charger allows it use a Felx charge and then under the same assumption that the 3000's are NiMH charge them under a Linear Charge.

PS what charger do you have?
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Old 04-18-2006, 05:05 PM   #8
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i normaly charge my batts the morning of the race. When i say off and on, i mean taking it on and off charge inbewteen charging the one's i'm normally using. I have the ICE charger.


P.S. Thanks for all the detailed help. havn't been 1/10 for a while and then still only used the 1800's.
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