b791

I'm getting ready to buy some packs but I don't know if I should get 4,5, or 6s. My ESC can handle 6s.

I don't know if its better to go 4s with a higher kv motor or 6s with something like 1400-1700kv.

One thing I am sure of is I want them all the same s rating so the car drives the same with each pack.

TeckLancer

iTrader: (16)

first u have to ask yourself if your racing or bashing. i race my eight and i use a 4s 5000 25c zippy lipo and it runs real good. i also have the losi 1700 combo on my eight

Marzac2

iTrader: (12)

As the summer progresses, more and more people will be wishing they chose 6S and a 1500kv motor (or lower).

The more cells you chose to run will inevitably be more efficient and cooler running. So if you are starting to chose equipment now and already have a ESC capable of running 6S, then go with 6S.

Packs are getting lower and lower in price and quality seems to be getting better at the same time. Check out some of the newer Nue packs. Soon, a 6S pack will cost less than $100 each (here in the US) and it will be a good day!

Don't try to go with anything more than a 1500kv motor with 6S if you are trying to race.

fullsyzz

iTrader: (121)

I run 4s in my AE truggy with MMM/2200 and it's tits.

glassdoctor

iTrader: (4)

Pretty much all the guys running Caster cars are doing 4s, because of the layout of the car... built to run standard 2s ROAR type packs. I also ran 4s with my other cars before the Caster.

4s and 1800-2000 is a proven setup that I've run for several years without a problem even in the summer heat.

But I agree that voltage is your friend, and 6s is a good thing if you choose the correct motor. I have a pair of 3s packs and 1300kv motor, and it seems to run very well but I haven't run it much yet. I'm wanting to try racing it sometime soon, but not as a permanent change.

Right now my favorite 4s race (lightweight) setup:
Caster Fusion Pro
Mamba Max Pro
Neu 1509 1.5y 1820kv
Maxamps 2s 4200 35c packs
geared 44/15 (43/13 diffs)
about 7.5lbs w/JC body and Panther Boas

mrklaw

are there any guidelines in place for this, or likely to be coming along? or do you just work off not hitting the max rev limit of a motor and go from there?

eg will there be classes that require a 4s limit?



edit: Just looked at the ROAR site - 1/8 buggies seem to have a 4s lipo limit for batteries.

Cain

iTrader: (294)

Nice this with 6S setup from what I understand is you don't require as high a amp rating on the pack as you would on a 4S setup.

I saw a nice set of 3S hardcased lipo packs on rclipos that could work good in the Caster or similar setup. pretty cheap too.

badassrevo

iTrader: (12)

I have run both 4 and 5s and have chosen a proven 4s set up.
I did not see any benifits to the 5s system.

I have no problems with heat or run time.

I run 2 2s MaxAmps 6500 packs
a Neu 1512/2.5d 2050kv motor and a MMM

Tomeygun

iTrader: (1)

re: KV vs input voltage...

I had a cheap 1100kv motor from overseas for my first try at an E-1/8th and it was dirt slow on 4s as you can imagine. So I got both 4s A123 packs under 12.5 volts and then put them in series to the MMM esc = 25volts

Still the motor was quite warm after 10 minutes... but just as fast as the 4s/2200kv combo.

I like the idea of higher volts/less kv, but fitting high cell counts with A123 is a pain

B.A. Racer

iTrader: (10)

wat i do and i highly recomaend is two 2s 5000mah 28c SMC packs seried...works amazing but if you dont want two 2s packs check out the new SMC CMX 4s pack

yzracer758

iTrader: (18)

I run: SMC 5000 4s 40c
SMC 5400 4s 40c

SWAMPER

AE RC8E with two 2S 5200mah 40C packs

Leodis

iTrader: (16)

FT RC8e with two 2s Reedy 35C 5000 packs, but that will change when Reedy comes out with their 4S brick pack.

kufman

iTrader: (6)

I currently run an RC-Monster RC8E with NeuEnergy 4S 4300's and 5500's. 15 minutes is pretty easy to do with the 5500's.

Maxxican

iTrader: (67)

what run times is everyone getting from their pack combos.

I have 2 Reedy 2s 20C 5000mAh that i plan to use. My set up is a AE FT RC8 converted. 46/16 gears. Novak HV 6.5 brushless setup. We run 15 min mains will these packs last the whole race?