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Old 10-22-2005, 08:27 AM   #601
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Quote:
Originally Posted by koabich
I've seen some SMC packs with numbers like that. I have several.


Last edited by GroffBall; 10-25-2005 at 05:48 PM.
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Old 10-22-2005, 10:27 AM   #602
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Originally Posted by GroffBall
Yeah I know, I have some very sweet numbers like that too, but I'll never ever buy or believe another number on a Promatch pack.
First of all Promatch does not grade their batteries at 35 amps. Second Promatch is a great company and has outstanding customer service and quality. No need to slam them, their numbers are not inflated, Jeff Roe is an honest guy running a good company.
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Old 10-22-2005, 10:29 AM   #603
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Quote:
Originally Posted by Manu_05'
Hello,
I would like to know if it's easy to make 5 min with an IB3800 and a 8 turn ?

ThanX

No problem.... YOu should come off the track with a minimum of 30-45 seconds to spare...


Curtis,
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Old 10-22-2005, 12:24 PM   #604
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Quote:
Originally Posted by pops
First of all Promatch does not grade their batteries at 35 amps. Second Promatch is a great company and has outstanding customer service and quality. No need to slam them, their numbers are not inflated, Jeff Roe is an honest guy running a good company.

I second this post.
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Old 10-22-2005, 06:18 PM   #605
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1.2V from the IB 3800 is the same as a 1.185V from SMC @ 35A.

If anything, Promatch are conservative and the cells are better than the labels. They match the cells at the standard 30A but have you noticed that the charge rate is 5A? That means the labeled voltages are conservative because everyone else gets their higher numbers from 6A charging.
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Old 10-22-2005, 06:47 PM   #606
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Quote:
Originally Posted by Ooj
1.2V from the IB 3800 is the same as a 1.185V from SMC @ 35A.

If anything, Promatch are conservative and the cells are better than the labels. They match the cells at the standard 30A but have you noticed that the charge rate is 5A? That means the labeled voltages are conservative because everyone else gets their higher numbers from 6A charging.
Agreed Completely. Just picked up a bunch of pro-match 4 cell IB3800's with KILLER numbers and they perform even better then what I was expecting. My 12th has insane punch/top end & runtime to boot! No complaints here! Customer service is top notch as they complied with my late requests after I ordered the packs online. All of my future packs will be coming from them. 2 Thumbs up!
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Old 10-23-2005, 12:55 AM   #607
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There must be something realy good with IB3800 as the only battery rule for the "GP Batteries Touring car world cup" in switzerland only say: Battery : max. 3700 Mah
http://worldcup.rcworld.ch/rules.asp
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Old 10-23-2005, 01:14 AM   #608
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They are SMC matched packs, matched at 35 amps.

If allowed, I will tell you who I got them from. You know who you are......
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Old 10-23-2005, 01:36 AM   #609
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Quote:
Originally Posted by PitCrew
They are SMC matched packs, matched at 35 amps.

If allowed, I will tell you who I got them from. You know who you are......
Wait another several weeks before you give away the source. By then, I'll have all the packs I need for the rest of the year...
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Old 10-23-2005, 03:02 AM   #610
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Due to the low IR of the IB cells don't get to carried away with the voltage on the labels. In our track testing a 1.175 pack compared to a 1.190 pack ran about the same on the track because they both have low IR.
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Old 10-23-2005, 04:03 AM   #611
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I haven't even run any IB's yet. I still haven't built them.

I am expecting they will perform nicely though.

However, I think those labels will do well in the intimidation factor, to those who look at them.
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Old 10-23-2005, 12:12 PM   #612
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Unhappy ib3800

what are the main factors that raise the ir of these batteries.4 month old 30 cycles ir went from 1.6 -3.2 (first batch)?
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Old 10-23-2005, 02:28 PM   #613
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You possibly discharged them a bit to far. They tend to build alot fo resistance if discharged to to low of a voltage.
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Old 10-24-2005, 11:45 PM   #614
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What's the longevity of the 3800 cells like? Sounds like they are pretty hot packs, but what do they perform like after 30 runs?
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Old 10-25-2005, 10:18 AM   #615
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I have been using one pack of IB3800's for a few weeks now and they do not feel as fast as when I first ran them. Either the pack is falling off or my motor is.

My routine is to tray the pack for a minute or two (integy 0-30)

Charge linear at 6A on Pitbull X3 at .022 cutoff

Run pack in stock qulaifier #1 then marshall

Tray pack until lights go out or a minute or two later

Place pack in front of a fan to remove heat then store until before the main

Tray pack for a minute or two

Charge at 6A w/.022 cutoff

Run main, marshall, discharge until the lights go out and store

I have only been using the pack twice a night for the last three weeks and it just does not feel as fast as it did. Presently my GP3300's feel about the same. The 33's get about the same treatment but I have been palying with a .042-.052 cutoff. The reason I say the 38's feel slower is the straightaway performance. I could run as fast or faster than anyone down the straight when the 38's were new. Now they are no faster than the 33's at the end of the straight. The performance with the 33's has not fallen off but it seems like the 38's have.

I am wondering if the two cycle a night routine is too much for the 38's. The fan to cool the cells off for storage for a couple hours is detremental. Or, discharging beyond .09V/cell is degrading performance.

I am going to freshen the motor today and see if that has any effect. Any suggetsions? Thanks guys.
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