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Old 08-05-2005, 07:45 PM   #16
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Do the IB 3800 cells vent a lot? Do you feel these cells will hold up over the long hall. Do you have any time on these cells to determine when they start to fall off in performance. Thanks
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Old 08-05-2005, 08:45 PM   #17
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I have 2 ib 3800 packs and none of them vent, I charge the packs with a much more ctx charger at a linear charge of 6 amps and also tried out step charging and they never vent. Whilst step charging the pack peaks at a lower temperature then when I linear charge, however I notice no difference in performance. Maybe the step charging yields a few more seconds of runtime. Before charging I discharge using a spintec discharger then tray them an hour before charging either on a Nosram discharge tray or a much more zero-v. Both trays seem to work similar.

I tried out 2 gp 3700 packs with figures reading 1.19+ from a major brand where as the ib's read 1.170 and 1.175 ordered from a hobby shop in Hong Kong. Both the gp's and ib's are matched at 30amps. Whilst trying out the 4 packs with a 7 turn ti based motor (skimming the com after each run) the gp's gave a constant run with a slight dump after 4mins, and a noticable drop in performance after 4:30 mins, the ib's had an impresive first 4 mins dropping my lap times by .3 of a second and finishing off the 5 min .2 of a second faster then the gp packs. Just imagine having IB packs reading 1.19+ ....wow !!!!

Their is a noticable difference using IB 3800's, lap times will surely drop if you are capable of handling the power and keeping motors at a reasonable temperature. The much more motor cooler surely helps out.

Bye for now.
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Old 08-05-2005, 11:19 PM   #18
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hmmm... very impressive terstimonials.... maybe i shld give the IB's another chance, since all the IB's i hv used so far, are very UNimpressive. don't get me wrong, the power is awesome, but you can feel the drop in power from min to min, thereby causing you top change your racing lines.

i feel the GP's hold the power better.
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Old 08-06-2005, 01:16 AM   #19
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Default IB3800's

At the moment im using matced IB3800 packs with voltages between 1.185-1.189V at 30 amps. I use a Much More cell master to charge them at a linear 6 amps. I have never had any of them vent, they are very consistent in the way they perform and i never have any problems charging them past their capacity before they peak cut. They come off the charger at around 36 degrees celcius. They are insane, performance wise and i have never had a problem with runtime.

The matcher i bought them from said never to take them down to 0V
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Old 08-06-2005, 01:57 AM   #20
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It seems like the IB3800s are the way to go but what about the IB3600s? Anyone have aything to say about these?

Another question, I just recently bought a matched IB3600 pack and i noticed right away that there is a 3800 cell on the end. All cells numbers are around the same so would this give me any problems?

Thanks
Sean
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Old 08-06-2005, 02:31 AM   #21
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Quote:
Originally Posted by highwayman
hmmm... very impressive terstimonials.... maybe i shld give the IB's another chance, since all the IB's i hv used so far, are very UNimpressive. don't get me wrong, the power is awesome, but you can feel the drop in power from min to min, thereby causing you top change your racing lines.

i feel the GP's hold the power better.
Your feeling a drop in power with the IB3800 ?

Some of the first generation IB3600 were known to drop off a bit at the end of run not the 3800.

In drag racing and boat racing where allot of current is required IB cells outperform any other cell. I think in car racing motor setup and gearing may need to be changed to use the benefit of the power these cells provide.
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Old 08-06-2005, 07:19 AM   #22
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Danny, we've been running your IB3600's here with great success. The 3600's have held plenty of punch and lots of rip throughout the entire runs...

I've recently picked up my first IB3800 pack and I'm anxious to try them on the track. My IB3600's were strong enough that I've recently sold off my GP3300 packs.

We've been traying the IB's immediately prior to charging for 15-20 mins after the lights go out on a 20-30A tray, then immediately hitting them with a 6.5A charge....LOTS of rip...

Most of the people locally that have thought the IB's to underperform have made the judgement after running the packs 2-3 times...and as you've stated on multiple threads it takes 5-6 runs for the packs to really come to life.

I'm a believer
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Old 08-06-2005, 07:24 AM   #23
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IB3800s
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Old 08-06-2005, 09:41 AM   #24
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Quote:
Originally Posted by Danny/SMC
Your feeling a drop in power with the IB3800 ?

Some of the first generation IB3600 were known to drop off a bit at the end of run not the 3800.

In drag racing and boat racing where allot of current is required IB cells outperform any other cell. I think in car racing motor setup and gearing may need to be changed to use the benefit of the power these cells provide.


Yes, and they are IB3600's from SMC. i tried different gearings and just couldn't get any consistent performance... could i send them back to you?
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Old 08-06-2005, 11:00 AM   #25
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Highwayman send me an email so we can discuss a solution.
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Old 08-06-2005, 10:17 PM   #26
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I was talking with Barry Baker this weekend at the gas race and he said he has been playing around with the 3800s versus the 3700s and he feels that after the first couple runs on the 3800 there is no comparison. The IB's are definately stronger. He even said that there are many racers in the Far East when he went over last month that preferred the IB cells, but could not run them because of politics. Maybe this is why you don't see them in big race results...yet.
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Old 08-06-2005, 10:26 PM   #27
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If the 3800's don't like to the dead shorted, then will they hang with the 3700's in stock and 19turn? Or are they just killer for mod racing?
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Old 08-06-2005, 10:30 PM   #28
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I've actualy heard that the 3800's DO respond well to dead shorting...the early 3600's however did not....

There are enough matchers that are monitoring this thread that I'm sure that we will be able to get an answer one way or the other....

Keep in mind though that the voltage and IR numbers on the 3800's WITHOUT being deadshorted are still better than what you were typically seeing from high-end packs even AFTER dead-shorting...

i'm sure they'll be just fine for stock and 19T
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Old 08-06-2005, 10:37 PM   #29
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Mr. Jolly,

Drop your peak detect back to .02 or 20mV. To me its almost like the IB cells are similar to a Li-poly cell. When charging them they dont fall back very easy. It seems that once they get to 130 degrees that it dont take but 3-4 minutes and they can easily be 170 degrees!!

Ive had the best success with the Much More charger using the Temp cuttoff. It never fails that way. The step charging really seems to work good with these cells because they get hot so fast you can drop the charge rate back on the 2nd step to let them cool off then peak them on the 3rd step at 6 amps like normal and they finish around the perfect temp and have tons of rip and run time.

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Old 08-07-2005, 12:56 AM   #30
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Quote:
Originally Posted by Pro4Capece
If the 3800's don't like to the dead shorted, then will they hang with the 3700's in stock and 19turn? Or are they just killer for mod racing?
Some are deadshorting the IB3800 with good results. From what we have seen so far it the 3800s are fast in every class.
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