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Old 04-11-2011, 06:08 AM   #5581
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I would definitely go with the LiFe rx packs. The biggest I can find in a hump pack is LiFe 6.6V 1700mAh. They do make a 2100mAh but not in hump. You can get yours at igthobbies.
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Old 04-11-2011, 06:15 AM   #5582
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if you guys are looking for a real banger on a budget we now have the Argus A52's in stock....These are made in the same factory as the D Alpha engines.... 2.17 HP and 86 oz/in , drilled/filled crank, tungsten slug...for only $225.00

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Old 04-11-2011, 06:45 AM   #5583
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Great work there Neal. That sounds like a great buy definitely.
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Old 04-11-2011, 08:22 AM   #5584
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Gotta remember with LiFe packs is if you are using High Voltage servos, you will not get full potential unless you use Lipo.

Either way, they are better than Nimh for sure. Reedy and Protek both make 1700mah LiFe packs.
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Old 04-11-2011, 09:08 AM   #5585
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Not necessarily true, WB. I have a Futaba digital for steering and Hitec analog high torque for throttle/brake and the LiFe rx pack worked fine with very little current draw. I felt I got full use/potential out of both servos during my quals and main the last SWCS race. I will let folks that want to try the LiFe pack know that you should balance charge it every time as not to jack up the per cell voltage (unbalance the pack).
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Old 04-11-2011, 09:30 AM   #5586
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Sorry for the confusion, I was speaking about the Hitec servo's that are the 7.4v High Voltage. They need Lipo to reach their full potential, but will also work fine with the LiFe, but at a lower torque and speed rating.
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Old 04-11-2011, 09:42 AM   #5587
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I just built up a 2-cell Li-ion pack to try. It's 4000 mah and weighs in 20 grams lighter than Nimh.
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Old 04-11-2011, 10:56 AM   #5588
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Originally Posted by WildBillMassey View Post
Sorry for the confusion, I was speaking about the Hitec servo's that are the 7.4v High Voltage. They need Lipo to reach their full potential, but will also work fine with the LiFe, but at a lower torque and speed rating.
I don't use HV servos. I feel that it is overkill at times. But, if you use a LiPo rx pack, I would definitely recommend using the HV servos with a receiver that can take 7.4v as to eliminate the voltage regulator and not burn up your radio gear in the car.
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Old 04-11-2011, 12:18 PM   #5589
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So if we use LiFe pack we'll need to have a charger that charges LiFe pack right?
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Old 04-11-2011, 12:30 PM   #5590
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So if we use LiFe pack we'll need to have a charger that charges LiFe pack right?
That is correct. I have a Hyperion charger to charge mine. Many of the new chargers on the market now give one the capability to charge LiFe batteries.
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Old 04-11-2011, 12:38 PM   #5591
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So if we use LiFe pack we'll need to have a charger that charges LiFe pack right?
If you don't have a charger yet Bassman, you may use mine at the track to charge up, until you find the one you like. Spooky's pack sound awesome as well.
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Old 04-11-2011, 12:55 PM   #5592
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So if we use LiFe pack we'll need to have a charger that charges LiFe pack right?
Most chargers (if not all) that charge Lipo can charge Life. I don't know the exact settings to do that but I've seen lots of racers charge their Life packs like that. I don't use HV servos and I use Lipo packs but since I use Spektrum brand recievers they allow me to use the Lipo without a regulator in place. I have been using this set up for years now and I haven't had any problems with any servo. This just to clarfy can be done ONLY with Spektrum brand recievers. They regulate the voltage output to the servos to 6.0V.
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Old 04-11-2011, 01:44 PM   #5593
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thats sweet, i run the k.o. propo gear, the receiver can use a lipo with out regulator, but they do not regulate power, i have servo's that can hang, BUT i run LIFE wich most servo's can hang with without a reg as its 6.6 volt, or a goosed up nimh pack. VERY IMPORTANT when running LIFE packs, YOU MUST break them in, for 20 cycles at least, i've Swollen 3 packs by not taking the proper time to just keep bumping em' up, if they drop below 60% for first 20-30 cycles i believe, They CAN and WILL swell, i've done it!! expensive lesson, but i've been running them before protek got there hands on them, and they include that handy info i posted, most likely more accurate also...
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Old 04-11-2011, 01:52 PM   #5594
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Quote:
Originally Posted by jneg View Post
Most chargers (if not all) that charge Lipo can charge Life. I don't know the exact settings to do that but I've seen lots of racers charge their Life packs like that. I don't use HV servos and I use Lipo packs but since I use Spektrum brand recievers they allow me to use the Lipo without a regulator in place. I have been using this set up for years now and I haven't had any problems with any servo. This just to clarfy can be done ONLY with Spektrum brand recievers. They regulate the voltage output to the servos to 6.0V.
I have a ThunderPower 610C and it does charge LiFe batteries as well. I just called them to confirm. I'll need to set it at "A123" setting for LiFe batteries. Cool, more weight to come off my open car
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Old 04-11-2011, 02:05 PM   #5595
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I have a ThunderPower 610C and it does charge LiFe batteries as well. I just called them to confirm. I'll need to set it at "A123" setting for LiFe batteries. Cool, more weight to come off my open car
Your gonna need some to keep it from flying away!
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