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Old 02-20-2005, 05:44 PM   #241
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Last night MarkA and Thirdplace (Richard) used an SMC 1.160 pack to compare with their other normal GP packs (1.175+ and higher) during competition.

MarkA found that this pack carried punch far longer through the run, never felt like it flattened out and, even though it had lower numbers than other GP packs and though he was undergeared, he was turning lap times that were as fast as with his good GP packs - this with a mid-range IB pack.

I'm feeling the same type of results with my unmatched, unzapped pack. . .
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Old 02-20-2005, 08:09 PM   #242
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very interested in getting a couple of packs of these, how are you guys charging your packs, (charger setup)

currently using a LRP Pulsar competition 2
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Old 02-21-2005, 08:10 AM   #243
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I am also interested in if you are charging these packs any differently. Also, do these packs take to dead shorting the same way that the GP cells did?
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Old 02-21-2005, 08:19 AM   #244
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These cells do not take kindly and not recommened to dead short these cells.

also i have to lrp comp 2 charges, i have 3 packs of these cells, and they are my favorite packs, they are continually getting better.

charger setup, 6.0amps, 35mv peak detect. same on my lrp comp 2's and my ce gfx.
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Old 02-21-2005, 09:18 AM   #245
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Quote:
Originally posted by JDM_DOHC_SiR
I have found out that this cell has a huge power band over the GP cell untill 6.8 volts and after that the IB cell starts to drop off little bit faster than the GP cell .. but there is one thing that this cell likes is heat!! pre-warming these cells really makes a difference on the track... I have started to pre-heat them to 40 deg C for about 1hour prior to charging ...and they like to be about 70~75deg Cels before you hit the track a little hot... but the way these cells are made is different than the way GP or Sanyo .. (metal is a bit different).. Also one thing too.. if these cells are cold they tend to run like...well A$$ ... so I`m going to try to srink wrap all of my Intellect packs and see if that can help keep some of the heat from leaving the cell when on the track...due to the wind going across the cells when driving..
they tend to come off the track at about 50deg C when I run them right off the charger... but if I let them sit for about 5 mins before I run they are at about 60deg C and they come off the track at around 40~43C and they run very different... this cell is very strong for 19T and up... not too much mod testing ass of yet but I have put a couple of 4 cell packs together that I`m testing with my 1/12 car
more testing to come
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Dave
Thanks for that report. Thatīs quite interesting. I found out with the class Iīm running (touring 27T fatwire 6 min.) my current Orion GP3300 are at 7.20V or above when checking with my Protrak (20A) afterwards. This could mean that 6.80V you mentioned could work for me. Iīm still waiting for my IB3600 cells to arrive, itīs 2 weeks now from HK. Canīt await testing them.
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Old 02-21-2005, 10:14 AM   #246
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so far i've treated my new cells the same as gp3300'sas recomended on the smc website. these batteries have performed great. i did notice that they temd to get a little hotter. i agree with the above statement, they like to be hot.
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Old 02-23-2005, 08:48 AM   #247
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hello danny what kind of life spand can we expect to get on these cells ? i got some from speedworld and so far there great
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Old 02-23-2005, 09:25 AM   #248
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mk2: Not sure of the lifespan the cell is to new.

I was talking with a few drivers overseas who have more track time with this cell and they mentioned to me to put the pack on a tray like the Integy 30A , Apex 20A or Duratrax 20A for 7-10 minutes before charging the pack.
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Old 02-23-2005, 10:33 AM   #249
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Cool-thats an easy way to put some heat in them before charging.
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Old 02-23-2005, 11:04 AM   #250
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How would a 30A tray for 10 mins warm up the cell? Unless you are discharging a fully charged pack....

I use an Integy Reactor 30 after a run, and it discharges the pack in less than a minute usually (4.4v cutoff - factory setting), and after that just powers the discharger fan...

Or does it take a long time to go that distance from 4.4 to 0.0 even at 30A?
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Old 02-23-2005, 11:14 AM   #251
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My Integy 20 amp discharge tray will warm up a pack thats been discharged on my T35 to 5.4 (0.9 per cell). Are we discussing hot vs warm?

Ray
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Old 02-23-2005, 11:23 AM   #252
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So I'm guessing it will take awhile to go down to 0.0 (is that what your 20A cuts off at?)


Would it be an idea to try this with a Smart Tray set to 0.0 cutoff? Ooops.. likely not enough current draw...
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Old 02-23-2005, 11:28 AM   #253
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Yeah-a Smart tray takes a cell to 0.9 or wherever you set-it very slowly and wihout much heat.

The Integy however dumps pretty hard-but it still takes a long time for a pack to be truly DS even on the Integy.

For example-I can take a dumped pack thats been in the Integy for say 20 minutes and put it on the Smart Tray in DS mode-and all the lights will still be on.
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Old 02-23-2005, 01:57 PM   #254
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Quote:
Originally posted by BigDogRacing
Danny, Dave, or anyone else that is doing extensive testing of the IB cells, I have a question. Please give your feedback or possibly even try this and tell us the results.

First of all, let me state that I run stock and 19t on road TC. Most of the racers I know race the same- even in off road. With that in mind and looking at SMC's website and many others, you will see that Danny and most of the rest are separating packs for mod and stock. Obviously, the stock/19t racers like myself don't really care about the last 600maH of the pack. Here's why:

19t TC we average around 28-30A (at the most- probably less) draw over a 5 minute run so let's do the math-

30A x 5min = 30,000ma x .083333h = 2,499.999999maH

Add in a couple hundred maH for scrubbing the tires or a hot lap, and you have around 2700maH. Most GP3300's are averaging 3200-3300maH over a 30 or 35A discharge curve. So in all actuality we don't care if the pack has 5500maH because the only part of the curve we are using is the first 2500-2700maH. For those raeding this that don't know, we really DO care because the higher the maH, the longer we stay high in the discharge curve... aaaanyway, so if we were to take the cells we know are good for stock/19t (which basically are the cells which are substandard for mod runtime) and looked at the first 2700-3000maH wouldn't we be able to tell more about the info that WE need to know?

HOLD ON!!! I know what you are thinking- we won't be able to compare apples to apples, we can't look at our old packs and tell blah blah blah. STOP. Now drop your "old school" thinking and think outside the box for a second. Who cares about comparing to the current stuff? They will still have to cycle the cells at .090 cutoff to weed the mod cells from the stock/19t cells, so they can put those numbers on the cells or the package or where ever- let's look at the information WE need.

Here's my reasoning- I've always felt this way, but the discharge curve for all the batteries from the last few years have been fairly similar. But the IB cells are different. They have a great first three quarters discharge curve but the last part of the curve is goofy. So we honestly can't look at the average discharge numbers and tell what the cells are going to do compared to our current GP3300's. We can verify this even on our CE chargers because the AV numbers are quite different at .90 and 1V- this tells you the cells are staying between .90V and 1V for a long(er) time than what we are used to seeing. Now, let me take this to the extreme- Say I have a cell that is 4500maH. For the first 3000maH (or 3aH), the cell has some phenomenal voltage numbers like 1.25AV, but the last 1500maH, the cell suddenly drops to .95AV and stays there until 4500maH. Now it doesn't take a rocket scientist to see that in mod the pack would rock the first 3 or 4 minutes, but the last minute it would be sheot, right? But in stock or 19t where it stays in the awesome 1.25AV for the whole 5 minutes, it would be unbeatable!

Now for the question I need someone lioke Danny to answer- how do we cutt the discharge average off at the 3000maH in a way that would be a good standard to look at all stock/19t packs or cells?
I have used a method like what you are describing to separate my packs for stock and mod.

Basically, I would run them on my quasar (or 20amp lights or whatever with a volt-meter) I take the actual voltage every 30 seconds untill the battery is dead.

I have had numerous packs that had voltage of say 7.2 actual volts (20amps) at the 5 minut mark that had less runtime than other packs that showed lower voltage at 5 minutes. So those packs were good for stock, the others for mod.

I would also venture to say that using this method a pack that is 440 sec at 1.170 avg volts will show a higher voltage at 5 minutes than 400 1.185.
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Old 02-23-2005, 03:54 PM   #255
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Quote:
Originally posted by Danny/SMC
mk2: Not sure of the lifespan the cell is to new.

I was talking with a few drivers overseas who have more track time with this cell and they mentioned to me to put the pack on a tray like the Integy 30A , Apex 20A or Duratrax 20A for 7-10 minutes before charging the pack.
Yes gettting the cell warm makes a big difference with this cell thats why I use a battery warmer prior to charging
-Dave
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