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Old 06-11-2005, 06:30 PM   #1
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Default 3800-vs-3700 batteries

Are the 3700 cells better, I ask because the 3700 cell seem to cost more, I'm thinking about getting the Pro-match 3800's
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Old 06-11-2005, 10:20 PM   #2
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i think GPs cost more than IBs. GPs have been around a long time and they are proven batts.
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Old 06-12-2005, 12:13 AM   #3
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IB are good for such a new company but i don't think their numbers are quite up there compared to GP but they are still good batteries.You couldn't go wrong with either.

Sean
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Old 06-12-2005, 12:28 AM   #4
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Actually I would say that the IB is every bit as good. Run times are higher and resistance is really low. It really comes down to preference...
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Old 06-12-2005, 01:48 AM   #5
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At the Reedy race every driver that had a choice between the IB3800 and the GP3700 chose the 3700. The IB's are getting better but they aren't quite there yet ...I stress yet because IB is actively working on bettering their cells. Every shipment gets better. If they keep at it they will be on par with GP soon.
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Old 06-12-2005, 06:21 AM   #6
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Quote:
Originally Posted by AdrianM
The IB's are getting better but they aren't quite there yet
Just wondering, so how come many matchers are already seeing better figures for voltages and runtime compared to GP3700

Last edited by dhiracing.com; 06-13-2005 at 01:41 AM.
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Old 06-12-2005, 06:33 AM   #7
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ive seen IBs exploded
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Old 06-12-2005, 07:51 AM   #8
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Also The IB's don't like to get taken down past 0.9V which is kind of a problem for guys who tray there cells for longer periods or like to dead short. I have heard of people loosing 60sec of runtime and not have it come back after takign their cells past .9V. Just some more information. I have used the 3600's from IB but I did notice that they don't seem to last as long as my GP cells. I have stopped purchasing IB cells untill theycan take a over night stay on a tray.
Just my two pennies,
Stephen <><
Plus I noticed that there is more punch longer with 3700's. Just got another pack from promatch.
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Old 06-12-2005, 07:55 AM   #9
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Actually the IB's react very well to Deadshorting. I done a 4 cell pack and the numebers are below and are at 35 amps

361 Runtime
4.79 Average voltage (1.1975 per cell)
8.1 Actual IR.

They were right at 400 seconds originally and then after a few runs the runtime went down to around 380 then I deadshorted it. The voltage before was 4.73 and the IR's before were 8.6.

Still going to play with it some more but so far they seem to like it....

EA
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Old 06-12-2005, 08:14 AM   #10
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Quote:
Originally Posted by EAMotorsports
Actually the IB's react very well to Deadshorting. I done a 4 cell pack and the numebers are below and are at 35 amps

361 Runtime
4.79 Average voltage (1.1975 per cell)
8.1 Actual IR.

They were right at 400 seconds originally and then after a few runs the runtime went down to around 380 then I deadshorted it. The voltage before was 4.73 and the IR's before were 8.6.

Still going to play with it some more but so far they seem to like it....

EA
Well EA you know I trust you. I was just going off my past experience with the 3600's and what guys at the track are using and saying. You know me if they are better I will get some. But so far so good with the 3700's seems to have the punch all the way through the run, whereas my past experience with the 3600's is that they have great rip at the start but taper off after 2 mins and continues to loose its rip from there.. But those were 3600 and not 3800 so really I am going to wait and see how they turn out...
That is why there are sponcered drivers, so they can test all these batts for us mear mortals...LOL
Thanks EA for giving the other side of things.
Also did you get my PM regaurding the setup on 19T the two magnet setup? Will the other setup work with just two mags or will I need more than what we talked about.
Thanks,
Stephen <><
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Old 06-12-2005, 10:28 AM   #11
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Adrian... I thought that the Reedy race didn't allow the 3800's just the 3700's... at least that was what was in the rules before the race on their website...

Actually I have started dead shorting my IB 3800's and it looks like they actually do like it. I'll try and post some number comparisons between similar packs dead-shorted and non-deadshorted....

As far as cells exploding... yes I'm sure they can if they are overcharged just like the GP's do as well...

So far I'm seeing that the 3800's like either a .03 delta peak on most chargers... some like a .04 on others. Right between 120 and 130 deg. F with a temp cutoff works well too. The biggest problem with a new cells is people assume they can charge it the same as brand X cell when the chemicals inside aren't the same.

Michael
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Old 06-12-2005, 10:34 AM   #12
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Adrian M: Ralph Burch used the improved IB3600 to finish 8th at the REEDY race. He even won a few of his heats so performance of IB cells is every bit as good if not better than GP cells. Our track testing has shown us more punch with the IB3800 and extra capacity.
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Old 06-12-2005, 12:59 PM   #13
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Quote:
Originally Posted by Tempest2000
Adrian... I thought that the Reedy race didn't allow the 3800's just the 3700's... at least that was what was in the rules before the race on their website...

Actually I have started dead shorting my IB 3800's and it looks like they actually do like it. I'll try and post some number comparisons between similar packs dead-shorted and non-deadshorted....

As far as cells exploding... yes I'm sure they can if they are overcharged just like the GP's do as well...

So far I'm seeing that the 3800's like either a .03 delta peak on most chargers... some like a .04 on others. Right between 120 and 130 deg. F with a temp cutoff works well too. The biggest problem with a new cells is people assume they can charge it the same as brand X cell when the chemicals inside aren't the same.

Michael
Hi Michael,

What kind of charge procedure are you using step or linear? And whats the charger being used?

Bye for now. Thanks

Gustav
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Old 06-12-2005, 10:12 PM   #14
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I mainly use linear charging...

CE chargers... turbo 35, GFX, and pitbull seem to like a .03 peak detect.

on the orion advantage I use .04, but with a temp cut off around 48 C...

I've noticed that the temp sensor isn't exactly the same on every unit though...

Orion posted Hara's charging steps for the 3700's use my above cut off settings and try his steps... it's on their website...

Michael
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