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Old 08-07-2005, 11:30 AM   #1291
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Originally Posted by 190mph
Guys, I have heard the GP3700 are bigger than the 3300's. I heard that people have some difficulty putting them in TC4's and other cars etc. I see XRay has a new chassis for the GP3700. I didn't see or do first hand fitting it yet so I don't know.

I will be making a battery strap modification for my TRF415 with the Xray strap and those plastic battery stop items. I am sick of taping in the battery.

I see on the GP website that the GP3300 (GP330SCHR) and GP3700 (GP370SCHR) has the same nominal dimensions at 23mm diameter and 43mm height.

So what's the difference? I want to make sure the chassis can handle both when I am finished with it. Thanks.
Almost all GP3300's are ~22.6mm in diameter. GP3700's are all ~23mm. A pack of 3700 is quite a longer than 3300. They fit in most cars OK. Cars that normally have 7 cells slots like the TC3/4 or tape batteries in like the 415 and FK05' do ok with them.

Xray and Schumacher and Losi have new 3700 chassis or battery trays. The 415MSX is supposed to have slots cut for 3700's. Everyone else will have to wait for the next generation cars to have the batteries fit perfectly.
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Old 08-07-2005, 11:34 AM   #1292
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or people can simply pull out a dremel and file a little bit till the fit
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Old 08-07-2005, 03:32 PM   #1293
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Originally Posted by odawg315
or people can simply pull out a dremel and file a little bit till the fit
Yes I guess that a little more filing to fit the 3700's will be good. The 3300's will just fit in a tad bit deeper in the chassis after doing this. At least the cell height isn't any different. I wouldn't want to file each of the slots longer.

Thanks for the information guys.
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Old 08-08-2005, 03:32 PM   #1294
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I hope everyone had a good weekend. I spent all weekend testing my suspension settings. Im excited for this weekend though I was able to cut almost 2 seconds off my laptimes.
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Old 08-08-2005, 06:38 PM   #1295
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I had a great time this weekend . qualfying 2nd in the A of 19t but then over heated the tires and fell way back .... still power never being an issue ... Hope everyone else had fun ... I had a whole lota fun ...
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Old 08-09-2005, 10:31 PM   #1296
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well it's showtime this weekend in Indy at the Velodrome Nats...I gotta get my track record back in Indycar class that they took away from me about a month ago..It's time to slap the Fusion Power on them boys..so wish me luck!! some big guys are coming to town!!
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Old 08-11-2005, 10:46 AM   #1297
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Back from vacation and back to the track Friday night.
John you called it, the Reedy Truck Race was moved to Oct. 28-30th so it won't conflict with the Vegas race. It's now the week after the Stock Nat's.
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Old 08-11-2005, 12:22 PM   #1298
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Hey guys, I picked up a few packs since my 3300's are showing their age. I'm new to 3700's, so I just wanted a quick rundown on the best way to handle charging and discharging them. I race stock and 19T. How many amps should I charge at? Should I deadshort, or discharge to .9 per cell? Best to give the battery a full charge right before you use it, or okay to charge it the day before and peak it before a race? Sorry for the newb questions, I'm starting to pay more attention to battery care and want to make sure I get it right this time around.
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Old 08-11-2005, 12:46 PM   #1299
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Syndrome,

The following text is from my web site, I get asked this one quite a lot so I just cut and paste this info. I originally wrote this for 3300's but it works well for 3700's. The only difference is I generally get 4500 - 4800Mah into the 3700' when I charge. The only thing I will add is to be careful charging with a high ambient temp, watch how hot the cells are getting.

Chris.



General charging technique

I have been asked a few times recently about my regimen for using my cells. I do believe you need to have a method which you stick to as it seems that these cells do like to be treated the same way every time. If you have read most of this web site and the Pro Trak website you will see that fully equalizing your packs is essential for getting the most run time out of your cells. Even if you do not use all of that run time it is useful to have as it gets you further back on the discharge curve (higher voltage) at the end of the run. So saying, the following method is what I do with my cells.

1. After racing I will discharge to find out what run time I have left, then put my cells away (no equalizing here).

2. The night before my next race I will pre-equalize my cells for around four hour and maybe leave the last cells on the tray overnight.

3. On the day of the race I will put my cells on the discharge tray and leave them there until I need to take them off to charge.

4. I charge my cells as normal (for me this means temperature charging in the winter to 115F and peak charging in the summer with a cutoff of .03v)

5. Repeat.

I donít like the idea of leaving my cells on the discharge trays for too long as I think sometimes strange things can happen, particularly with older cells. A lot of people have had some good results with dead shorting but I have heard of some problems. If for example problems will only happen to 5% of cells packs that still means you may lose 1 pack in 20, for me it is not worth the risk. Also the much touted improvement in cell voltage is easily explained by the reduced run time, I would be much more interested in the voltage at 5 minutes as a more accurate comparison.

Generally I can get over 4200Mah into my 3300ís when I use this method and from the tests we have done the more you put in, the more you will get out.

Of course and as always you try all of this at your own risk, this is just what I do and so far I have had some good results. Any comments, please let me know.
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Old 08-11-2005, 12:55 PM   #1300
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Fusion has a link that gives some really good information in regards to your questions. I personally would not dead short your batteries. I did it to a couple of my packs and killed a few cells in each pack. .09 is my suggestions, and I believe Fusion makes that claim also.
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Old 08-11-2005, 01:03 PM   #1301
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Thanks for the replies guys. I've got the manual from Fusion's page, so I'll take the advice here and from there and try to get my head around something that works for me.
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Old 08-11-2005, 02:48 PM   #1302
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3300's and 3700's are pretty much the same thing. You can use the same charge rate for both.
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Old 08-13-2005, 12:02 PM   #1303
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TTT ...
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Old 08-14-2005, 07:53 PM   #1304
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Hey john .. way too much fun today racing 19t spec class .. TQ and the win !!! what can I say .. Fusion is running strong .. and Im seeing more people that I race with running Fusion Power ... got to love it !!!
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Old 08-14-2005, 08:24 PM   #1305
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My weekend didn't start out to well. I had a ugly qualifier finishing in the 8th spot for the A-main. But thanks to the help of Fusion Batteries I was able to get the hole shot, stay in the lead for the whole race, and then take the win in the A-main for the WNTA/NH Offroad Series to put me back on top of the series. Thanks for the great batteries these things are wicked
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