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Old 06-16-2008, 08:34 PM   #16
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i've tried smc 5000 (28c), orion 4800 and orion 3600. if your car can fit the smc 5000 go with that one. plus heat them up and you will feel the difference.
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Old 06-16-2008, 08:46 PM   #17
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i'm running orion carbon 3200's. compared to my old, but still pumping out good #'s, IB3600's these packs are a huge improvement as far as power and run time are concerned. when on track with drivers of similar (lack of) skill running similar motors but "better" lipos, i have yet to see a difference.

i have no idea what the total run time is with a 13.5 or a 10.5. i practice for no more than 6 minutes and have yet to feel a drop off.
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Old 06-16-2008, 10:01 PM   #18
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I call BS on the 2 above posts. Ive done speed tests against the Yeah racing lipos vs the Trakpower 4900 in identical vehicles and the Trakpower was quite a bit faster.

Your friend didnt get 50 min on a trakpower 4900 with a 10.5 unless he was going incredibly slow. The max is about 19 minutes and that is not geared the fastest.
he was going slower than he could have been going because it was his first or second practice with the car and lipo.
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Old 06-16-2008, 11:37 PM   #19
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he was going slower than he could have been going because it was his first or second practice with the car and lipo.
Then it was pointless to make the claim you did !!!
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Old 06-17-2008, 01:12 PM   #20
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Hi Guys, just wana know peoples views on the differet lipos how they feel on the track ie punch duration...

Thanks

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Hi Ricky

The two I keep hearing about are the Core 5000 and the Orion 3200-3600's
I run the Core's (it's difficult to get to the connections on the Orion when mounted in an mi3)

I'm going to make up an adapter so Spencer can try my packs to compare, at present I can't see a difference between our cars other than corner speed etc (setup)

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Old 06-17-2008, 04:57 PM   #21
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While lipos take one hour to charge (the usual flat rate), you can bring two or three to the track as opposed to six NiMH packs and you'll end up running the entire race day with no sags in sight. One pack in the car, a second on standby and a third on the charger.
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Old 06-18-2008, 12:27 AM   #22
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Even a 5400 NIMH would still charge in less time than a lipo. 100mah takes about 1 minute at 6A, even less at 8A. So a 4600 pack takes about 35-40 minutes at 8A, so a 5400 would take about 50min, still 20-25 minutes less than a lipo of the same capacity. Again, it's how the lipos take the charge with fluctuating amperage that takes the time, not the capcity IMO.

So you're charging a NimH at a higher amp rate than a lipo... no wonder it charges quicker...

a 1C charge will end at roughly the one hour mark.

The difference with a Lipo is that once it hits 8.4v (90% charged) the charger will reduce the amperage to keep that voltage at 8.4 whereas with a NiMh charge it'll keep going and cut off when the batteries peak.
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Old 06-18-2008, 06:37 AM   #23
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Even a 5400 NIMH would still charge in less time than a lipo. 100mah takes about 1 minute at 6A, even less at 8A. So a 4600 pack takes about 35-40 minutes at 8A, so a 5400 would take about 50min, still 20-25 minutes less than a lipo of the same capacity. Again, it's how the lipos take the charge with fluctuating amperage that takes the time, not the capcity IMO.
You can charge a LiPo pretty fast with some of the newer high end balance chargers. I've been charging at 10 amps with my FMA balance charger and it's working out fine. Takes about 40 minutes to charge a 4800 or 5000 LiPo (Orion or SMC). A good LiPo on a balance charger won't even get warm to the touch charging at 10 amps. Be careful with those charge through balancers (some only balance at a quarter amp between cells and that may not be enough with an older pack).

My Orion 4800 is over a year old and it still works great. Been charging hard since day one without any problems.
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Old 06-18-2008, 09:58 AM   #24
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So you're charging a NimH at a higher amp rate than a lipo... no wonder it charges quicker...

a 1C charge will end at roughly the one hour mark.

The difference with a Lipo is that once it hits 8.4v (90% charged) the charger will reduce the amperage to keep that voltage at 8.4 whereas with a NiMh charge it'll keep going and cut off when the batteries peak.
My point was that w/ lipos and the recommended charge rate (5400 = 5.4A), they just take longer than NIMH. You can't crank up the amperage like with NIMH to charge faster if needed. Of course a pack will charge faster at a higher amperage, thus the reason I used 8A w/ NIMH.

I also noticed that the lipo packs start off the same way as you posted they finished. With a low amperage at first, then ramping up to 5.4A, and then back down as the pack "peaks". I use a balancer (Checkpoint) each time I charge.

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You can charge a LiPo pretty fast with some of the newer high end balance chargers. I've been charging at 10 amps with my FMA balance charger and it's working out fine. Takes about 40 minutes to charge a 4800 or 5000 LiPo (Orion or SMC). A good LiPo on a balance charger won't even get warm to the touch charging at 10 amps. Be careful with those charge through balancers (some only balance at a quarter amp between cells and that may not be enough with an older pack).

My Orion 4800 is over a year old and it still works great. Been charging hard since day one without any problems.
10A, really? I was under the impression that you cant go above 1C per pack, because the Lipos just can't handle it. What type of charger are you using for this?
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Old 06-18-2008, 10:25 AM   #25
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Hi Ricky

The two I keep hearing about are the Core 5000 and the Orion 3200-3600's
I run the Core's (it's difficult to get to the connections on the Orion when mounted in an mi3)

I'm going to make up an adapter so Spencer can try my packs to compare, at present I can't see a difference between our cars other than corner speed etc (setup)

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Old 06-18-2008, 10:55 AM   #26
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Old 06-18-2008, 11:15 AM   #27
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It's a fact that charging above 1C will adversely affect the number of usable cycles that a battery can provide. It doesn't seem to matter much, since we get so many cycles, most people are happy to replace their packs by the time they finally wear out.

I wouldn't charge above 1C unless you have a good reason for it. I've managed to race with LiPos for 3 years now, never using more than two packs, and 1C charging has been fine, both for racing and practice.
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Old 06-18-2008, 11:31 AM   #28
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Old 06-18-2008, 12:22 PM   #29
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Top punch in Orion 30C 3800mAh
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Old 06-19-2008, 03:11 AM   #30
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RC MARKET do you currently have the new orion lipos? if so what is your best price and will you price match?

Thanks
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