SMC 28C High Performance 4000mAh - 5000mAh Hardcase Lipos
01-20-2008, 01:20 PM
#46
*****WARNING: The below info is for experienced racers only. SMC and EA Motorsports do not recommend the following procedures. They deem them UNSAFE and will not assume responsibility for personal injury or property damage.*****
1. Do not attempt to use the following info on any other Lipo packs other than SMC 4000/5000 packs.
2. The following will decrease the life of your pack by at least 3/4.
3. The more the following process is repeated the greater chances are for FIRE dangers.
4. D0 NOT leave your pit area while performing the following procedures.
5. If a FIRE is caused do not use water or conventional fire extinguishers. USE SAND and smother the fire out.
6. Due to mis-use the manufacturers warranty will be void.
CHARGING (CE Lipo updated GFX)
12000mah or 12 amps
2 cell 8.40 peak
(90-95 degree temps)
DO NOT hook up sensor leads
DISCHARGE (CE Updated Lipo GFX)
35 amp
2 cell 6.0 cut-off
(140-150 degree temps)
Hook up sensor leads
CONDITIONING (CE Updated Lipo GFX)
Cycle, Cycle, Cycle...............
Charge then discharge several times prior to racing.
Under high end racing conditions 2 packs are needed. Cycle the pack using the above info and do not delay in-between discharge and charging. When the pack is done discharging go directly into a charge. With the SMC packs 3-4 cycles will "top out" the pack. Many other Lipo packs took 7-10 cycles and still did not top out.
When you are done with your heat/qualifier dump the pack and go right back into a charge.
At the end of your main or day of racing dump the pack done and store without charge. More than 2 weeks do not discharge your pack.
RE-PEAKING
*****Again this is VERY dangerous and can cause serious personal injury.*****
After the pack has completed a normal charge, re-peak with your Lipo GFX on NIHM mode at 10 amps. Let the pack overcharge to 9.00 volts and then stop the GFX. DO NOT WALK AWAY during this process as the pack will catch fire.
*****WARNING: The above info is for experienced racers only. SMC and EA Motorsports do not recommend the above procedures. They deem them UNSAFE and will not assume responsibility for personal injury or property damage.*****
Brilliant... Maybe some of you guys should just stick with NiMh.
01-20-2008, 01:26 PM
#47
*****WARNING: The below info is for experienced racers only. SMC and EA Motorsports do not recommend the following procedures. They deem them UNSAFE and will not assume responsibility for personal injury or property damage.*****
1. Do not attempt to use the following info on any other Lipo packs other than SMC 4000/5000 packs.
2. The following will decrease the life of your pack by at least 3/4.
3. The more the following process is repeated the greater chances are for FIRE dangers.
4. D0 NOT leave your pit area while performing the following procedures.
5. If a FIRE is caused do not use water or conventional fire extinguishers. USE SAND and smother the fire out.
6. Due to mis-use the manufacturers warranty will be void.
CHARGING (CE Lipo updated GFX)
12000mah or 12 amps
2 cell 8.40 peak
(90-95 degree temps)
DO NOT hook up sensor leads
DISCHARGE (CE Updated Lipo GFX)
35 amp
2 cell 6.0 cut-off
(140-150 degree temps)
Hook up sensor leads
CONDITIONING (CE Updated Lipo GFX)
Cycle, Cycle, Cycle...............
Charge then discharge several times prior to racing.
Under high end racing conditions 2 packs are needed. Cycle the pack using the above info and do not delay in-between discharge and charging. When the pack is done discharging go directly into a charge. With the SMC packs 3-4 cycles will "top out" the pack. Many other Lipo packs took 7-10 cycles and still did not top out.
When you are done with your heat/qualifier dump the pack and go right back into a charge.
At the end of your main or day of racing dump the pack done and store without charge. More than 2 weeks do not discharge your pack.
RE-PEAKING
*****Again this is VERY dangerous and can cause serious personal injury.*****
After the pack has completed a normal charge, re-peak with your Lipo GFX on NIHM mode at 10 amps. Let the pack overcharge to 9.00 volts and then stop the GFX. DO NOT WALK AWAY during this process as the pack will catch fire.
*****WARNING: The above info is for experienced racers only. SMC and EA Motorsports do not recommend the above procedures. They deem them UNSAFE and will not assume responsibility for personal injury or property damage.*****
01-20-2008, 01:27 PM
#48
Once Lipos become accepted for high end racing there will be many who will try to push the limits and try to come up with methods of extracting more power out of Lipos. The same is true with sub-c.
The fact is that most pro Lipo racers refuse to understand that Lipos are not as perfect as originally thought and to be comeptitive with Lipos will mean that proper charging/cycling will be required.
The increase in performance gained by cycling and conditioning Lipos is much greater than anything you can do to sub-c packs.
The fact is that most pro Lipo racers refuse to understand that Lipos are not as perfect as originally thought and to be comeptitive with Lipos will mean that proper charging/cycling will be required.
The increase in performance gained by cycling and conditioning Lipos is much greater than anything you can do to sub-c packs.
01-20-2008, 01:28 PM
#50
Here are some cycle numbers to show the Overcharge does perform. They were done using the above charging, discharging, and re-peak.
IB SMC SMC
4200 5000 5000
8.40Peak 9.00Peak
Run 374 518 610
Volt 7.54 7.22 7.46
IR 8.7 10.0 6.9
5 8.34 7.85 8.49
30 7.93 7.63 8.23
60 7.70 7.53 8.08
120 7.60 7.42 7.87
180 7.53 7.32 7.69
240 7.45 7.22 7.52
The IB4200 is deadshorted.
IB SMC SMC
4200 5000 5000
8.40Peak 9.00Peak
Run 374 518 610
Volt 7.54 7.22 7.46
IR 8.7 10.0 6.9
5 8.34 7.85 8.49
30 7.93 7.63 8.23
60 7.70 7.53 8.08
120 7.60 7.42 7.87
180 7.53 7.32 7.69
240 7.45 7.22 7.52
The IB4200 is deadshorted.
01-20-2008, 01:31 PM
#51
Tornado, stop being an idiot and posting stuff and saying "if you follow these its really dangerous". We dont need crap like that in our hobby. Its irresponsible. I can be safe but if the guy pitting next to me does this and I get hurt as a result Im going to be very unhappy with you.
01-20-2008, 01:31 PM
#52
Does the current SMC Lipo where the wires exit from the top have a hard case?
01-20-2008, 01:35 PM
#53
Tornado, stop being an idiot and posting stuff and saying "if you follow these its really dangerous". We dont need crap like that in our hobby. Its irresponsible. I can be safe but if the guy pitting next to me does this and I get hurt as a result Im going to be very unhappy with you.
We all look for ways to go faster and this is one example. Warnings were posted and it was just a matter of time before someone else figured it out and posted what was found.
Last edited by Tornado_Racing; 01-20-2008 at 01:53 PM.
01-20-2008, 01:38 PM
#54
No need to flame and be childish with the name calling. It takes a big set of balls and some thought to try this without buring the house down.
We all look for ways to go faster and this is one example. Warnings were posted and it was just a matter of time before someone else figured it out and posted what we have found.
We all look for ways to go faster and this is one example. Warnings were posted and it was just a matter of time before someone else figured it out and posted what we have found.
01-20-2008, 01:40 PM
#55
No need to flame and be childish with the name calling. It takes a big set of balls and some thought to try this without buring the house down.
We all look for ways to go faster and this is one example. Warnings were posted and it was just a matter of time before someone else figured it out and posted what we have found.
We all look for ways to go faster and this is one example. Warnings were posted and it was just a matter of time before someone else figured it out and posted what we have found.
01-20-2008, 01:41 PM
#56
Wow, I can't believe what I have just read. But anyways, go ahead, charge them like that. Just don't do it around me or anywhere I race. If I find out someone is charging lipo's like that at track I help run, well they won't be running there. I seriously hope dawn reads this thread and makes an addendum for this, so as to not allow this sort of idiocy. I'm sorry but anyone who needs the advantage so much that they are willing to put other people in harms way need to leave this hobby. That includes you nimh folk who overcharge as well.
01-20-2008, 01:42 PM
#57
Sad to see that guys will be doing the same with lipo that they were doing with nimh batts by pushing the envelope. Only real benefit is to those who have deep pockets or sponsored.
We have guys charge there nimh batts at 8/10 amps for stock racing and after a few weekends of racing sell them oof to the suckers that think they still in great condition.
What happened to "fair play" unfortunately that is the reality that the guys with the bucks or sponsorships still dominate at expense to other racers and in this case the safety risk of fires as well.
Club racers need to add to there must have shopping list to include bomb proof battery charging boxes for nimh and fire proof ones for lipo !!
This is what will tarnish a good thing let alone a good brand !!
We have guys charge there nimh batts at 8/10 amps for stock racing and after a few weekends of racing sell them oof to the suckers that think they still in great condition.
What happened to "fair play" unfortunately that is the reality that the guys with the bucks or sponsorships still dominate at expense to other racers and in this case the safety risk of fires as well.
Club racers need to add to there must have shopping list to include bomb proof battery charging boxes for nimh and fire proof ones for lipo !!
This is what will tarnish a good thing let alone a good brand !!
01-20-2008, 01:47 PM
#58
Thanks for clarifying that Danny. I was aware they had a slight memory effect, but it wasn’t to my attention that it was extreme enough to warrant a high discharge/cycle procedure to obtain it.
Everyone, about the above procedures, I'm pretty sure ROAR has some rules (or if they don't, they should) to prevent the nearby guy pitting you from performing those extreme charging and discharging steps posted by Tornado.
If some of the ROAR rules and guidelines aren't followed for proper use of Lipo's at a race event, i.e. deliberately charging a Lipo pack past 8.04 vlt on purpose during an event the racer would be disqualified, or past a certain charge rate/amp recommended for a such pack. All that has to be done is bring it to the race director's attention in order to put that racer on "probation" for the race event, then disqualified if that is found to be the case. It's simple as that. The same if they aren't charge in a Lipo sack during a such procedure. Rules are in place or hopefully they being written up at this moment if they haven’t yet to prevent that from happening.
Now we COMPLETELY understand why ROAR wants to do this regardless if the pack are either soft or hard case to reduces the chances of injury or incidents from racers trying a such procedure. Even though certain performance increases can be obtained, it isn't safe or worth it to risk injury to your fellow racers in my opinion. No question about it.
Fortunately for me, when it comes to 2wd & 4wd off-road, there's no need to push Lipos to their extreme limits, or cycle them as described above, because they already offer more power than I can use in off-road applications, unlike on-road or oval racing.
Everyone, about the above procedures, I'm pretty sure ROAR has some rules (or if they don't, they should) to prevent the nearby guy pitting you from performing those extreme charging and discharging steps posted by Tornado.
If some of the ROAR rules and guidelines aren't followed for proper use of Lipo's at a race event, i.e. deliberately charging a Lipo pack past 8.04 vlt on purpose during an event the racer would be disqualified, or past a certain charge rate/amp recommended for a such pack. All that has to be done is bring it to the race director's attention in order to put that racer on "probation" for the race event, then disqualified if that is found to be the case. It's simple as that. The same if they aren't charge in a Lipo sack during a such procedure. Rules are in place or hopefully they being written up at this moment if they haven’t yet to prevent that from happening.
Now we COMPLETELY understand why ROAR wants to do this regardless if the pack are either soft or hard case to reduces the chances of injury or incidents from racers trying a such procedure. Even though certain performance increases can be obtained, it isn't safe or worth it to risk injury to your fellow racers in my opinion. No question about it.
Fortunately for me, when it comes to 2wd & 4wd off-road, there's no need to push Lipos to their extreme limits, or cycle them as described above, because they already offer more power than I can use in off-road applications, unlike on-road or oval racing.
Last edited by 4wd Racer; 01-20-2008 at 01:49 PM. Reason: grammar
01-20-2008, 01:50 PM
#59
The fact is that in racing people want to have an edge and try be faster. It has always been like this and will continue to be like this. It's just good for you guys to know that there are ways to make lipos faster or stay faster as many of you have been believeing the hype that you just put one Lipo pack in your car and never discharge it or take care of it. That may work in types of racing where speed/power isn't critical but in applications where it is you will need to train and maintain your Lipos. That is just a fact that people have to understand.
01-20-2008, 01:53 PM
#60
right, but the thing is rules are being written up or already are in place by ROAR such as not charging a 2s Lipo pack past 8.04 vlt, etc and so on, to prevent the above procedure or other extreme measures being done at a race event. Otherwise risk disqualifcation, which certainly WILL BE ENFORCED.
I certainly will report it, and expect any other fellow races observing any such procedure to do so as well at any event. That's why rules are being written up in place to prevent that being done for the safety of the racing community, even if there can be certain performance gains from doing so.
I certainly will report it, and expect any other fellow races observing any such procedure to do so as well at any event. That's why rules are being written up in place to prevent that being done for the safety of the racing community, even if there can be certain performance gains from doing so.