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Old 05-28-2005, 12:48 AM   #31
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Just ordered 6 packs today. Can't wait to see how they do. It will be nice to have good batteries for once.
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Old 05-28-2005, 04:33 AM   #32
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FYI. I am matching IB3600 and IB3800 cells in Australia and have just been sent a test sample of the new IB3600 cell. Slightly larger (same size as GP3300) and runtime of around 450-460 secs at 30a with the voltages very similar to the new IB3800. The good news is the price difference to the IB3800 which should make this new IB3600 cell a great stock cell. The packaging is still the same EXCEPT that the 3600 on the cell is now the same style as the 3800 cell. I bet your matchers haven't told you about this cell.
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Old 06-05-2005, 09:38 PM   #33
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Anyone run these last week and have anything to share? I only have nfo 2nd hand-as I havent ordered mine yet-but I hear nothing but good things compared to the GP3700. NO drop off at end of runs. Yahooo!! Thats in mod sedan.
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Old 06-05-2005, 09:49 PM   #34
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Quote:
Originally Posted by rayhuang
Anyone run these last week and have anything to share? I only have nfo 2nd hand-as I havent ordered mine yet-but I hear nothing but good things compared to the GP3700. NO drop off at end of runs. Yahooo!! Thats in mod sedan.
well what have you heard about the 3700s? i just ordered 3.
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Old 06-05-2005, 09:53 PM   #35
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I just ordered two packs of the SMC 3800's and hopefully will be able to use them next weekend in the first event of a regional points series. I'll let you know how they go. Everything I've heard about them has been good, so I'm really looking forward to trying them out.
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Old 06-05-2005, 10:29 PM   #36
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Ray,

I just ran some that were (30 amp #'s) 480's low 1.18's this weekend in 19 touring car.

I ran the atlas 19 turns since that's what I tune. I built 2 motors one with 767's and one with XXX brushes.

I ran the same setup on the car with the same ratio all day to compare between 3300's and the 3800 IB's. Both the 3300 and 3800 batteries were low 1.18 batteries... The GP 3300's were deadshorted...

The track was VERY technical and the longest straight was maybe 30-40 feet into sweeping corners etc. So I was off and on the trigger a lot...

Round 1 My fastest lap was a 10.106 on lap 9 and my last lap was a 10.552
(3300 batteries and Atlas 19 with 767's 1st run on motor) (I believe the motor/battery fell off at the end it was definately several tenths slower the last few laps) I had 36 seconds left at 30 amps

Round 2 My fastest lap was a 9.918 on lap 24 and my last lap was a 10.176
(3800 batteres and Atlas 19 with 767's 2nd run same motor as first round) (the motor/battery didn't seem to fall off at all) I had 120 seconds left at 30 amps

Round 3 My fastest lap was a 9.890 on lap 14 and my last lap was 10.493 however my next to last lap was a 9.893 so I don't attribute the last lap to the battery falling off just traffic.
(3300 batteries and Atlas 19 with XXX brushes 1st run) (battery/motor did not feel like it fell off at all) I had 48 seconds left at 30 amps

Main My fastest lap was a 9.804 on the 2nd lap... now this main was a hackfest and I ended up breaking so I don't have the data I would like on this run... The 9.804 lap wasn't a perfect lap as I was pushing hard to break away from the pack... I believe I could have gone faster with a couple clean laps... only made 10 laps and let's just say they weren't "clean"
(3800 batteries and Atlas 19 with XXX brushes 2nd run) can't give a run time estimate I broke too early...

I purposely ran the 2nd run with the motors on the 3800 runs to give the advantage to the 3300's if possible. That way if the 3800's seemed better that would take the motor out of the equation...

As a quick note... I ran two warm up laps before each run to heat up the tires... track was a little slick...

Here is what I get out of the info... from round 1 and 2... The 3800's were faster and didn't drop off at all.. 2 tenths advantage.

Now after switching to the XXX brushed 19... that motor had more power and didn't fall off as bad towards the end of the runs.
In the 3rd round I picked up 28 hundredths or .028 seconds... virtually nothing but I feel the motor was stronger... (3300's didn't fall off)
In the main although I didn't finish, I picked up almost a tenth (.086) of a second from the 3rd round with the 3800's. This wasn't on a perfect lap (or as close as I get to one) i.e. hitting all the apex etc. and I didn't get a really good lap in due to traffic etc.
I'd say that in the main with the 3800's I could have gotten an even faster time, but it was still almost a tenth of a lap advantage.

Now I'm by no means a perfect driver, but I've won in our region numerous times and missed the A in sportsman 19 at snowbirds by about a second. So my times should be consistent enough to draw a conclusion from.

To me, the 3800's were faster on the track and on the race results. Not by much, but they definately did not give up anything to the 3300's.

The 3800's never fell off at all and seemed very consistent throughout the runs.

Hope that helps

Michael Skeen
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Old 06-06-2005, 02:23 AM   #37
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Did ya'll see this:

http://www.rctech.net/forum/showthre...65#post1625465

Looks like 3700's and 3800's in their current size have been declined ROAR approval for 2006!
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Old 06-06-2005, 06:59 AM   #38
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I posted my $.02 over there not that they care...

I really can't see them not approving the new cells. All the big "non Roar" races will be allowing at least 3700's. The distributors are already discussing when they will quit carrying the 3300's. Chassis manufacturers are already changing their chassis to fit the new cells.

In my opinion, if Roar does not allow the cells for 2006 they will be putting another nail in their coffin.

They will approve a totally new technology on the fly i.e. brushless, but advances in batteries they want to prohibit.

I really don't know why we have roar any more... Every roar race nats and otherwise I've been too in the past few years were run horribly. I don't know of many tracks that are roar members in TN at all any more.

Michael
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Old 06-07-2005, 11:06 PM   #39
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if you read further on in the thread... the guy did not know what he was talking about... he was confused about an earlier cell...

3700 and 3800's should be good to go for Roar in 2006
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Old 06-07-2005, 11:44 PM   #40
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Quote:
Originally Posted by Tempest2000
if you read further on in the thread... the guy did not know what he was talking about... he was confused about an earlier cell...

3700 and 3800's should be good to go for Roar in 2006

Yes-I did some research too and came away feeling the same way-the IB3800 and GP3700 should not have a problem being ROAR approved.

Ray
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Old 06-08-2005, 06:39 AM   #41
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Just a note about the hack fest TEMPEST.........hehehe, I had no part in it

The 3800s looked strong tho (especially compared to 1.17s).
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Old 06-08-2005, 08:00 AM   #42
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Considering the larger sizing of the 3700/3800 cells, has anyone weighed them to see the differences?

Just did...And came up with the following weights for my battery packs that are sleeved and glued with Corally connectors...
GP3300 = 385 g (cell diameter is 22.5 mm)
IB3600 = 400 g (cell diameter is 22.5 mm)
GP3700 = 410 g (cell diameter is 23.0 mm)

Scale accuracy is supposedly 1%.

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Old 06-08-2005, 09:21 AM   #43
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Hey,

Are the "Epic" 3800's the same cells as the IB 3800's? Just in different shrink?

Thanks
-Dan
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Old 06-08-2005, 10:18 AM   #44
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Quote:
Originally Posted by JRX-S Bill
Considering the larger sizing of the 3700/3800 cells, has anyone weighed them to see the differences?

Just did...And came up with the following weights for my battery packs that are sleeved and glued with Corally connectors...
GP3300 = 385 g (cell diameter is 22.5 mm)
IB3600 = 400 g (cell diameter is 22.5 mm)
GP3700 = 410 g (cell diameter is 23.0 mm)

Scale accuracy is supposedly 1%.

Bill
I found my IB3600's smaller than the GP3300s and as far as weight goes... now it could be my solder job, but I found only 2g difference between the IB's (400g) and the GP's (398g)(more solder on the IB's and deans on both packs)
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Old 06-08-2005, 11:17 AM   #45
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Ruben... hey I didn't mention names for a reason LOL but you DID HACK me in the heat races... remember round 3??? LOL

The epic 3800's and IB 3800's are the same cell.

The 3800's weigh about the same as the 3700 GP's per the weight of the previous post... I think it was 25 grams more than a 3300GP

Michael
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