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Old 10-25-2006, 02:31 PM   #16
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Originally Posted by streetracer745
so a 4300 lipo will last 30% logner then a 4300 nimh? are they more expensive?
http://www2.towerhobbies.com/cgi-bin...&I=LXLXR6&P=ML
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Old 10-25-2006, 03:34 PM   #17
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Quote:
Originally Posted by streetracer745
so a 4300 lipo will last 30% logner then a 4300 nimh? are they more expensive?
Yes. 30% more than a GP or IB 4300/4200 NiMH. Even more if you compare them to generic pre-assembled 4300 cells.

The reason is that the LiPo battery operates more efficiently during discharge.
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Old 10-25-2006, 03:41 PM   #18
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how about the peak performance 4800 power edition? heres a link( http://www2.towerhobbies.com/cgi-bin...&I=LXLVG3&P=ML ) do yall think that is worth $135? or should i get something different.
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Old 10-25-2006, 03:57 PM   #19
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For those experiencing one hour lipo charge times, what charger and amp rate are you using to charge your lipo cells? Trying to decide if I need a new charger that can charge at more than an single amp...
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Old 10-25-2006, 04:41 PM   #20
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From previous race experience with F103GT coupled with 23T brush motor fed with TrakPower lithium, less than or at most 1000Mah was charged back into the pack after every 5mins heat/main. Technical track, rubber tires.
Some other racers are getting much more efficient fuel consumption with brushless...
http://www.rctech.net/forum/showthre...&page=42&pp=30

For the same track, I'm using up at most 1500Mah in my TC4 w 4.5R + TrakPower every 5 mins run.... nothing to be proud of -> my driving is quite brutal

racingstorm,
Lipos are to be charged at 1C, meaning 1 x pack capacity(A)
If your lipo is 2500Mah, charge at 2.5A
If it's 4900 Mah, charge at 4.9A
This will allow you to complete charging at around the hour mark.

One sacrificial charging method is to charge at 2C, not all lipos are designed to take the stress though. TrakPower can take it easily with slight reduction in longetivity. This will speed up your charging time a lot, but it also means you will require a high amp capable charger.
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Old 10-25-2006, 04:52 PM   #21
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Here's an idea of the track, pics taken by fellow hobbyist Marah
http://s10.photobucket.com/albums/a1...Anch=imgAnch43

Thunder Power is one of the specific chargers that come with a charging program and setup that allows for safe 10Amps charging coupled with their dedicated balancer and data cable that relates back to the charger the voltage of the individual cells as the charging is in process. Forms a complete closed loop system that makes it capable of higher than 1C charging for lipos.
There is a disadvantage though.... this is a lipo ONLY charger...

Other brands of high capability chargers are from Schulze and Orbit electronics, both from Germany if i'm not wrong

TrakPower will be releasing specific chargers and balancers in time to come.
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Old 10-26-2006, 08:40 AM   #22
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Quote:
Originally Posted by RacingStorm
For those experiencing one hour lipo charge times, what charger and amp rate are you using to charge your lipo cells? Trying to decide if I need a new charger that can charge at more than an single amp...
Duratrax ICE
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Old 10-26-2006, 09:02 AM   #23
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Quote:
Originally Posted by RacingStorm
For those experiencing one hour lipo charge times, what charger and amp rate are you using to charge your lipo cells? Trying to decide if I need a new charger that can charge at more than an single amp...
You will need a new charger. At 1 amp, it will take an eternity to charge a 4800 pack.

Standard charge is 1C. Many chargers are capable of this. Better LiPo like Team Orion Platinum and Carbon as well as Trak Power can handle 2C charge as mentioned but with reduced life. Keep in mind that reduced life with LiPo may mean you get 750 cycles instead of a 1000. While not recommended because of this, 2C is acceptable.

So you need a charger that chargers at nearly 10 amps. I can't speak for others, but the Team Orion Advantage will charge LiPo at up to 10 amps. But it can only charge a 2-cell LiPo (7.V battery).

Team Orion Advantage Charging System

The Team Orion Advanced Flight Charger is another less expensive option that charges 1-5 cell LiPo at up to 5 amps.
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Old 10-26-2006, 09:10 AM   #24
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what about the peak performance carbon edition battery. is it good? will it last a long time and will it give me good power?
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Old 10-26-2006, 09:13 AM   #25
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Originally Posted by streetracer745
what about the peak performance carbon edition battery. is it good? will it last a long time and will it give me good power?
I think it is the same as the platinum 4800 but a different case (fits better in some cars) and less mah. It would give you the same power as the 4800 but less runtime.
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Old 10-26-2006, 09:16 AM   #26
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how much less time? and should i go with the team orion carbon for about $85, or the peak performance one for around $100?
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Old 10-26-2006, 09:20 AM   #27
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Quote:
Originally Posted by streetracer745
how much less time? and should i go with the team orion carbon for about $85, or the peak performance one for around $100?
The Carbon 3200 will give about the same run time as an IB 4200 NiMh pack. So for 5 minute racing, it is more than enough. It will have less run time that the 4800. But of course it is less expensive.

And you still get the benefits of LiPo, more power, more consistent performance, and longer life.

The Orion and Peak batteries are exactly the same. Go with the less expensive choice.
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Old 10-26-2006, 09:22 AM   #28
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could you fit the lipo into a 1/12th pan car? or would it be sole tc?
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Old 10-26-2006, 09:24 AM   #29
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Quote:
Originally Posted by streetracer745
could you fit the lipo into a 1/12th pan car? or would it be sole tc?
The size and configuration makes it impossible.
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Old 10-26-2006, 09:25 AM   #30
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ok thanks
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