Getting Race Ready!
 

Ima be able to finnally race. Parents woulndt drive me before, but its my b-day next mon, so they will. I wil be getting 7.4v3800mah limn packs. Would they last 10 minutes on an e-revo, 14/72, locked in 2nd gear? Regular maxx tire size. I dont want to worry about temps while racing. That is my biggest worry. I'll be running some cheapo 16 cell 3300s in the qualifiers. My batt tray sags down everytime i get a hard landing. I used m3 tape but it still moves a lil, is there a way to stop it withing my 5 day prepration time period? Im worried about limn, never had them before. Anything i should do to protect it or should know bout limn. For example, how to charge/take care. Is it okay to charge it up the night before and leave it sitting there till tis race time next morning? Will the batt drain like limn and i will have to give it a refresher charge? The track has a generator but the power is iffy. If to many people use i wont get much pwoer. SHould i use a car battery for charging limn? i dont think i have one with me, unless i steal it form my parent's car. What owould happen if the charger has inconsisten amount of juice going into it?

PS, any have some med-hot plugs who live near NJ, i need some ASAP. Also need a coupler for Smallblock trinity manifold!

I get about 15 minutes of runtime out of 14 GP3300 cells on my 10.5lb Revo (with batts), so you should be able to get 10 minutes. How heavy is your Revo? Weight is a factor.

Do you have a picture of your trays? I'm having a little trouble visualizing the sag you are talking about.

AFAIK, LiMn is "safer" than regular Lipos as far as the explosive aspect, but you should still take care not to overcharge/overdischarge them because the cells can still get damaged. I assume you are talking about the Apogee packs?

You'll be fine to charge them the night before. You just don't want them sitting for long periods of time (like weeks) at a max charge. As far as self-discharge, I'm not sure. They can't be any worse than NiMH cells!

What are you using for a charge? Is it one of those 12v input ones? If so, what power supply are you using? Most 12v switching power supplies (if that's what you're using) have a decent voltage input range they will operate fine in.

Some chargers are more sensitive to the voltage level and/or voltage quality than others. It really depends on how they are built, what kind and how adequate the filters are, etc. Some chargers don't like a "noisy" input and might error out when you try to charge you LiMNs at max charge current. If this happens, you can try reducing the charge rate which will pull less current and tax the power less maybe letting it be a little cleaner. Of course, charging will take longer...

I have an apache 2500, ima try to run the setup at full speed for 5minutes to simulate race condition, and then try to get teh temp. my gp3300s barely get 10 minutes! haha, maybe i should get some new batts. The PS is one of them computer ps taht were converted.

i basicly went full throttle and stoipped when the performance turned pretty bad. I got about 7 minutes from them. Also, temps were about 200 for motor....and 110 for esc. Are these too high? The esc has a fan so taht might have kept it really cool. I ran only 13 cells this time. What temps do you expect with 14 cells? or 14.4v limn packs?

Do you have a LVC on the truck for limn? It make sure you don't over draw the batts.

yes on the lvc

Well, hot motor, cool ESC usually means it's not geared high enough. That may effect runtime. How hot are your batts when the motor is 200? 110 for an ESC is pretty cool even with a fan, so it sounds like it isn't working all that hard.

I've said this in a few threads now; but if you draw heavy current out of batteries, you won't get the full Ah rating out of them because some of that power is wasted as heat on the battery itself. Drawing less current won't heat them up near as bad and will allow you to run them to just about their Ah rating, which translates as more runtime.

hmm, never took temps on batt, but i they were about 100 or so. They felt the same as teh esc. is my gearing absurdly low though? Can you guys tell me how you guys gear it with teh same amount of cells, motor/esc combo.

NEW results with 16/72 gearing, motor 180, so it probbably was that i undergeared it! batt and esc at bout 120-130. Problem is that i only got 5 minutes! Also, the esc started to get brake fade. cuz of the higher temps, grr, brake fade will cripple me in races, nothigns worse then having your car ram into the barriers.

Also, what about water proofing? They might wet down teh tracks right before our races. Do i have to worry bout mud getting on batts nimh. I covereed up the rx decently, but i doubt the esc and motor will get caked because fo they way i mounted it.

Hey, nc....is that your for sale thread over on RCtech? Shoot, If I'd known you were selling that radio equipment, I would have been all over it!

waht radio equipmetn? Do you mean the m8 or jr xs3? i got a nother m8 but its limited and has spek. Its my only one but i will give it up fi you got some nice stuff. Also, my limn just came in with apage. Anythign i should do after opening them up? Other than charge cuz i dont got my balencers yet.

Wow...He was doing so well...I geus iT si bAK to his spellinh lick dis....

LMAO!!!!!!!!!!!!!!!!! :027: :027: :027: :027: :027:

mokc me but u wnot helpm e?!??! ANSER MY QUESTISONS! My race is in 2 days! i need HEELP!

You can charge them for sure, but i would wait to run until you balance them. balancing in the beginning is the most important. As far as radio, i use the JR XS3, it works fine, but there are better ones out there. Radio is personal choice IMO

he was just pokin fun at ya man! :005: got to admit, it was funny!:027:

Wow...It got worse after I said something...Yikes...I would think he would have started typing in English...Good thing I speak Ncabzinesse...

Squee, you're killing me dude! :005: :005: :005: :005: :005: :005: :005: :005:

You musta read it before I edited it :p.

Maybe, but the chit was still funny!

Lol...I try...

HOw u charfge lipos with apage 2500? i dont see any connecters escpet one, but its more liek a reciever pack. Wtf is this break in perioud! i got a race in 2 days and dont have tiem to do 15 cycles! is the break in REALLY importatn? PLEASE HELP! I need to get this pack ready to race and for it on sunday. All my fellow racers laught at me having electric and called me a liar cuz i never get to go the track to proove them wrong. Cant be running crappy gp3300s! I have to defend brushless's honor! please tell me fast, i got SATs tom, so i gotta studdy

Got a pic? You should be fine, two or three runs you are good man. Relax! If you only have on plug, then not sure? My lipo's have two, one for charge and one for balance. What the hell is a apage?

I was lookin' for that button.... still LMFAO!!!!!

Ncab...yes, I was talking about the M8. Wasn't that your ad over there?
I'd be interested in makinga trade of something if your game, or if your willing to just sell it.

what mah charge should i select?
http://www.boomboombatteries.com/Pro...e=apach%5F2500
heres the possible mah. Do you solder banna plugs like you would with the 4mm gold plugs that mikes has? never used banana before.

Ok, what battery is it again?

3.8 amps is maxx charge on them. You should have two plugs. One real small and one for the esc to hook to. The small one is for balance. The other is for charging and running. The break in is not important. I didn't any way.

i run limn 2s, 3800mah packs. http://cgi.ebay.com/ws/eBayISAPI.dll...8229&rd=1&rd=1
would that connecter fit the apogge? what amp do you recomend? teh li-saver says only good for lithium cells, so i cant have that on while running nimh? Does taht mean i have to unsolder teh wires everytime i run nimh?

Not sure why you want to run nimh. They suck to the power of lipo or limn.

I hope you don't say much more. I won't be able to read it. :002:

well, i HAVE TOO! what am i going to do, NOT run in teh quallifiers or pray my 3800 lasts for 30 minutes of racing?? could i jsut disconnect the LVC from teh esc and rx?

I think you could do that disconnect thing. Never tried but sounds like a plan.

Well, you could do the disconnect thing, or install a bypass switch. To my knowledge, all a LVC does is interrupt the throttle signal wire and sends a neutral signal to the ESC instead. You could wire a switch on this one wire and bypass the whole LVC.

ahh, i arleady got a switch for ubec, i'll just unplug!

which selection is that? they only have MAH that goes from 200mah to 2500mah. Which one should i do? i dont want to ruin my packs.

Haha...I'll try not to....

SOME1 helP! my balancer has 3 pins, but they are in a 5-pin connecter. The pin on my limn has 3 pins. The prob is that the 3 pins on teh 5pin connecter is spred out, red and one black pin on teh left and one lonly black wire on the right! does it matter if i move the lonely pin next to the other pins so i cant fit it on the balencer. Also, it seems like the small rx style wire is hwere you charge? is this right PLEASE HELP ME FAST! I GOT sSOO MUCH STUFF TO DO for race and i dotn want ipos to not work

Get a picture of exactly what your talking about. I will try and find out what I can on the Apache 2500 for ya. What balancer are you using?

Ok, on the Apache, there is a lead for the power supply, its the ones with aligator clips and there is a battery lead with some sort of plug on it. Put your Deans, Powerpole, etc. on there and charge through that using a Y harness. Be sure to set the jumpers to 2500mah and 4S. Also, the balancer(s) hook to the taps of the batteries. I'm not sure what your talking about with the wires, but chances are you either need to buy an adapter (should have come with them) or you need to make an adapter. Its not really hard, but I need to know what balancer(s) your using...