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Old 03-18-2006, 04:15 PM   #16
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I didn't even bother matching them - ran a pack through my truck (they sent me 3 packs) and didn't even bother building the other 2...
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Old 03-19-2006, 12:54 AM   #17
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From a matcher ... I have all of the latest cells from both GP and IB. From my figures the cells match up like this at 30 amps.

The IB3800 and the GP3700 have very similar voltages and Internal resistance but the GP3700 has about 30 secs less runtime (450 secs versus 480 secs on average)

The IB4200 and the GPO4300 cells have a similar voltage and ir but again the IB4200 has about 30 secs more runtime than the GP4300. (530 secs versus 500 secs)

The GP4300 seems to have similar runtime figures to the best of the IB3800 cells.

Hope this helps
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Old 03-19-2006, 06:30 AM   #18
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That doesn't seem so accurate... The 3700s definately don't have the same voltages as the 3800s....
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Old 03-19-2006, 11:09 AM   #19
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My 20A bench testing.
EP4200 - 7.38/605/20r
IP3800 - 7.26/564/20r

My best GP3300s were 7.08/417/24r

I usually do it at 20a mainly for durability and that I will check batteries on a monthly basis. I am leery about some of the newer batts (like Int SC-3800) that seem to have cells deadshort at a moments notice.

The IP3800s seem to flatten out on repeaks. The EP4200s seem hold their own. RT does not really matter to me the voltage has been incredible with the 4200s but somewhat a snoozer with the 3800s on the track.

I still have some bench testing to do.
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Old 03-19-2006, 11:24 AM   #20
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Any numbers on the IBs for comparison to those numbers? Just want to see how they match up, as I found the EPs to be much weaker...
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Old 03-19-2006, 02:02 PM   #21
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Quote:
Originally Posted by ULTIMATEPOWER
from my testing:
the IB cells 3800-4200 still seem to be the better overall voltage cell than the newest batch of GP 3700s-4300s, Just Like the 4200 goes from IB its right on par with the 3800 killer volts and higher runtimes,the GP 4300 is still not up with IB in my opinion, therefore we do not plan on matching any of the GP3700s or 4300s at this time, we will still continue to match the GP1100 as they tend to produce more volts than the ib1200s and the 1400s

The IB1200/IB1400s have more voltage and capacity than GP1100s. Email me if you want a few test cells that will prove this.
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Old 03-19-2006, 02:13 PM   #22
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I tested your IB4200's today... what a power.. and extreemly consistant in power.. verry pleased with them..
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Old 03-19-2006, 02:27 PM   #23
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Hi Hugo glad to hear you like our IB4200s. I'm sure as SMC becomes more popular in Europe the other European racers will be very pleased with SMC/IB cells.

See you at the LRP race.
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Old 03-19-2006, 05:24 PM   #24
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Quote:
Originally Posted by elmo6s
That doesn't seem so accurate... The 3700s definately don't have the same voltages as the 3800s....
You obviously have not seen the latest GP3700 cells. I honestly prefer the IB cell but people here wanted an unbiased view of the cells. I have no commercial advantage from either company so I think I can give a reasonable review of the current cells.

I currently have GP3700 cells with 1.2+ volts (30 amps) and IR of 1.6-1.9 !!!!. I think this compares with the IB cells.
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Old 03-19-2006, 05:34 PM   #25
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Actually the IB3800s have 1.21+ voltage at 30 amps we offer 1.20+ at 35 amps plus the IB3800s have an extra 30 seconds of runtime over the GP3700s. The GP4300s are about the same in runtime as the IB3800s with the voltage being in the 1.19-1.20 range at 30 amps.
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Old 03-19-2006, 06:26 PM   #26
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does anyone know which cells are more durable long-term? I'm more interested in getting packs that won't die after 10-20 heats on the carpet. If the IB's are better, do they hold up as well? I'm fairly pleased with the longetivity of the GP's.
thanks.
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Old 03-19-2006, 06:32 PM   #27
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The IB cells have been hoding up real well when treated properly. The newer GP cells have been redesigned to get the IR lower and voltage higher than the previous models so i'm pretty sure they will not react the same as the older GP cells. Only time will tell.
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Old 03-19-2006, 06:39 PM   #28
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I ♥ my GP's

I've tried some IB packs but they didn't seem to work any better than my GP packs yet I hate the way the IB's need to be maintained
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Old 03-19-2006, 06:57 PM   #29
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The true test with any of these cells is to test them at a set POWER (WATTS) level. That is the best way to see the actual performance of the cells.

We have been testing cells at 35 and 42 CONTINOUS WATTS.

Both of the IB cells (3800 and 4200) hold up much better than any other cell in the market.

The reason why this test is so important and significant is that you are pushing the cell to its maximum. Since the POWER (WATTS) is kept constant, as the voltage starts to decrease the current that the cell delivers has to go up in order to maintain the set power...

We have found that the discharge curves of all other cells do not compare to the IB's.

Both, VOLTAGE and CURRENT delivery capabilities of the IB cells are superior.

Transient response tests on the IB's also show a faster reacting cell. The IB can react FASTER to changes in current and that is KEY to a better cell.

In a car, the current is changing continously (around 18 to 35 Amps, with fast peaks at around 90A) and a battery that can react quickly to these changes will feel to the driver as a battery pack that has HIGH PUNCH. THis reaction is critical to a cell performance and the IB also outperforms EVERY cell in the market.

Overall, the IB cells are superior.
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Old 03-19-2006, 07:11 PM   #30
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Quote:
Originally Posted by lonepalm4
does anyone know which cells are more durable long-term? I'm more interested in getting packs that won't die after 10-20 heats on the carpet. If the IB's are better, do they hold up as well? I'm fairly pleased with the longetivity of the GP's.
thanks.
I can not give you an answer on the IB4200 because there is not enough data yet to give anaccuate answer.

However, when treated and cycled the right way, IB3800 cells last a LONG TIME.
We have customers and team drivers that run on a weekly basis and start noticing a slight decrease in performance after MONTHS.
As long as the packs are not overdischarged and overheated, they will hold their performance past 35 complete cycles.

WE have seen packs hold up to 95% SOD after 45 cycles with the majority in the 85+% range.

There are many factors that affect the performance and longevity of a cell, and that starts with the ENHANCING (zapping) and matching process. If a battery is pushed during these processes, the longevity and QUALITY of the cell will be affected.

*SOD=State of Discharge
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