4S in Buggies
 

Seems like most common lipo battery used in a Buggy is 4S. Is that because of weight? I was looking at running a 2.5D 1512 in a Buggy on 5S

depends on the application...if you are racing especially in a shorter track you dont have much of an oppertunity to go WOT

Buggy
 

I'm running a 1512 2.5d/f in my 8ight on 5s. The Maxamps 4000mah 5s is a perfect fit, not too heavy and gives killer power with long runtimes and manageable heat. I had to add a heatsink to my Quark but no problems since. Best car I've tried yet!

My track is large enough, front straight is pretty long
http://i302.photobucket.com/albums/n...RC/18Track.jpg

http://i302.photobucket.com/albums/n...RC/20Track.jpg

http://i302.photobucket.com/albums/n...RC/19Track.jpg

What gearing where you running?
I was looking at running the Thunder Power eXtreme V2 5S 5000mah

4s is often plenty to surpass the nitros in both acceleration and top speed. I'm running 4s with a Neu 1512 2.5D/F in my Hyper 8, geared for ~45mph, and everything (MM + batts + motor) run at very acceptable temps.

What kind of run time do you get with that set up?

What gearing do you use in the Hyper 8? To get the 8ight to go 45mph on a 1512 2.5D & 4S would require a 17T-18T Pinion and 46T Spur. On 5S would require a 14T pinion. What run time you get?
How much extra run time would I get on using a 5S 5000 instead of a 4S 5000?

18t pinion with Kyosho 46t plastic spur. Run time when I was using a 14t pinion and 4s 4800mah was 15-20mins depending on the track. I've only run one pack with the 18t pinion, but I would guess ~15mins of runtime.

I run direct drive on my buggy with 5s, like stated above it depends on how much speed you need for what ur doin. i personally am a speed demon and just wanted the 5s :D my car would have don fine on 4

I'm running 14/46. I get 20 minutes of hard running or close to 30 min of my usual bashing around. I occasionally run at a local track and I never get more than 1/2 throttle into it, way too fast to let loose but it drifts like a champ on any surface.

When I get my Mamba Monster I'm going to run 6s and about 16/46 in my CR. I just bought a nice TP Extreme 6s 3850 but I probably won't get it until I get the MM because the guy I bought it from lives in Canada. Oh well, I guess the timing will work out well though right at the same time.

I'll keep you guys posted on my build thread as soon as I get that stuff in.
http://www.rc-monster.com/forum/showthread.php?t=9022

Would anyone know how much extra run time I would get running a 4S 5000 comparied to a 5S 5000?

Assuming you gear them both for the same top speed (and thus use the same throttle input), you should gain 25% runtime. So if you get 15mins on 4s 5000, you'd get almost 19mins on 5s 5000mah.

But if you keep the same gearing, you might end up with the same or slightly less runtime (depending on if you changed your throttle control or not with the higher top speed).

havent heard many good things with those extreme lipos... the flying guys are dissapointed in them.

I thought that was the 1st series and the V2's are one of the best packs on the market?

yes, i may be wrong, but the bad ones were great for 50 or less runs then pretty much useless...

Had my Hyper 8 geared with a 16T pinion a while back and it was waaayyy too much for a small track.

Now I get about 30ish minutes of runtime with dual MA 8Ah 2s packs, 1512 2d/f, geared for around 45mph (14t pinion) and it is quite fast and still has tons of torque. Temps are very good too. Actually, it's almost too torquey for a small track geared at 14T.

I thought that 4S was kinda "the standard" because that was what ROAR (or whoever makes the rules) decided was the fairest max LiPo cell count to keep things even with nitros.

I had no idea that ROAR or any racing organization made a ruling on 1/8 electric.

You may be right. Thought I had remembered reading something else somewhere though.

Found this:
http://www.roarracing.com/downloads/...ipo_Reader.pdf
but seems to be about 1/10 scale.

I believe it may have been the RC Pro series that went with a 4S standard for electric 1/8th. I don't know that for sure, but I seem to remember reading that on rctech.net.

I'll just be doing club racing (probably against nitros) so nothing to serious. Just got to find more info on the TP V2 Batteries and if it is worth spending $45 more on a 5S over a 4S

My guess is that they went from 20C to 25C cells or some small change like that. They use Enerland cells, so I wouldn't hesitate to use them myself.

I just bought a bunch of TP V2 packs and my initial impressions are very good. My TP V2 5S 3850 keeps up just as good as my 5S Neu 3900 pack. No idea on longevity yet as they are all less than a month old.

Also picked up some 6S TP V2 2600 packs for when my XB8 when my 1512 3.5D Neu comes in.

Yeah the TP 5S 5000 is pretty much the same price as the Neu 5S 5000 but I have $400 credit at Amain that I got to use up but still don't want to use the $400 on crap batteries that don't last. No-one has the Hyperion Adaptor to TP balance tap, how long could I run the batteries till they need to be balanced?

Try here for balancers:
http://www.rclipos.com/Balancers.htm

MaxAmps does

http://www.maxamps.com/proddetail.ph...ULTI-TP&cat=34

Sweet, thanks, free world wide shipping to :party:

The TP Extremes are one of the best batteries I've seen.:yes: In fact the past 2 weekends in a row I went out to the track and have been driving my X-1 CR on an approximately 1.5 year old Extreme V1 3s 25C 2070 pack and it runs fine. The only problem with that setup is that the battery is too small both in cells and capacity. But, it's just to test the buggy and it gets me about 10 min. After I run that battery to the 9v cutoff it's a little hot but it stays balanced throughout the entire charge period.

The other battery that I ordered will be a lot better suited for the job (TP extreme 6s 3850). I figure I should get around 45-60 minutes with that pack.

Heli guys swear by Thunder Power's Extreme lineup including myself.:mdr:

tc3_racer_001:
Who told you the Extremes were bad batteries?

Thanks for posting that up

Yeah - no problem.

Pat there is very friendly and I have experienced nothing but excellent customer service. I have placed several orders through them with no problems.

Use promo code poly4me for 10% discount.

That's great to here regarding longevity. I have a bunch of the ProLite packs that are 1.5 - 2 years old and are still in tip-top shape, which is why I gave the extremeV2 packs a try. Good to hear some first hand experience on the TP extreme packs as well.

I have read a lot of posts on the e-heli forums and I think they may be even harder on LiPos than we are. We get peaks of high current, but these guys can drain a 10S pack at 10c-15c with some of their crazy 3D flying.

i have just read so many people (small compared to the pple who own them probably) were complaining of them, not worth the money... but i see i am wrong.

SORRY!

End up ordering 2 x V2 packs today, so ill see how they go