Battery for 1/8

[Mugenextreme]

Have a question with regards Batteries for a 1/8th buggy. I am currently in the process of converting a Losi Eu from Nitro to Electric. have the conversion kit / speedo and Motor pretty much picked out but i was wondering what kinda/brand batteries are people using. Is a 4 cell the norm if so what sort of mAh are people running and approx what kinda run time should you see?

[Evsie]

I'm running a Losi 8ight-e and we're running Turnigy 4500mah 4S for qualifiers that give us approx. 12 minutes on full bore. We run a converted Turnigy 5800mah 4S (2 x 2S soldered together) for the finals which give us a maximum of about 16 minutes on full bore.

Hope this helps.

Ps. These were all bought from www.hobbyking.com (http://www.hobbyking.com)

[JonyNitro]

Have a question with regards Batteries for a 1/8th buggy. I am currently in the process of converting a Losi Eu from Nitro to Electric. have the conversion kit / speedo and Motor pretty much picked out but i was wondering what kinda/brand batteries are people using. Is a 4 cell the norm if so what sort of mAh are people running and approx what kinda run time should you see?

how much money you got? 4s is really the norm good for 25 plus mins more Mah over 5000. Hyperions, Nano Tech,s, any thing over 35c what ESC/motor KV you using

[dmcracing]

Check out max amps.

[Mugenextreme]

how much money you got? 4s is really the norm good for 25 plus mins more Mah over 5000. Hyperions, Nano Tech,s, any thing over 35c what ESC/motor KV you using

I have been looking at the Hobbywing 150A setup , either the old version with the 2240kv or the new type 150a with the 2700kv motor.Price wise there is not much in it. My issue is with batteries and the price of the ones which i would need to match the output required.
Has anyone got either of these setups or similar and can tell me whats best to use? or would it be better to use the Alternative 80A and run a cheaper setup. is it just total over kill to go with the 150A version

[HarlowS]

150amp speedo is good !! 2700kv motor ??? that bad lol. Unless your just using it for bashing the 2250kv would be more than enough.

[2FAST4U]

I run a Losi 2.0 with a Speed Passion ESC & Losi 1700kv motor & 4 14.8v lipo battery packs - 1 x 3000mah Turnigy, 2 x 5000mah Turnigy & 1 x 6000mah Turnigy Nano-Tech.

[axeman]

I run a 5s 5000mah turnigy with a monster mamba 2200kv motor. and I'm quicker than mr 2FAST4U:p:p:p

I can run a full bore for 15min.

[jasonwipf]

150 would be better than 80, even if you don't use all the capacity. An 80amp run at 80-90% capacity will run hotter than 150 at 50%. So not only will it run cooler and have less of a chance of frying but a cooler ESC will mean longer run times, longer run times mean you have flexibility to get smaller, lighter more agile batteries that are cheaper and/or higher C Ratings for more power.

The type of battery you get will really depend on what you are using it for. How much run time you need and yes of course what type of motor and ESC you are running. if you run an 80amp esc and 2700kv motor the packs I'd recommend would be 180degrees from a set up with 150amp and a 2200kv.

[Mugenextreme]

A hobbywing 150A with a 2250kv motor and a gen rc 5000amh 4s 40c pack.


Would this work ok.

Battery (http://www.rc-battery.com/app/menu.php?op=show_one_product&id=378#)

Speedo (http://cgi.ebay.ie/HOBBYWING-EZRUN-PRO-Brushless-Motor-150A-ESC-1-8-SL563-/270698508811?pt=UK_ToysGames_RadioControlled_JN&hash=item3f06e3720b)

Motor (http://cgi.ebay.ie/HOBBYWING-2250KV-Brushless-Motor-1-8-RC-Car-IM287-/390246088026?pt=UK_ToysGames_RadioControlled_JN&hash=item5adc7abd5a)

Any idea if a possible runtime

[jasonwipf]

Yes that would work. 2250kv would still be a bit overpower for racing (great for bashing) and 40c is kinda high especially with 2250. for 4s you need a min of 25C constant. the difference between 25C & 40c will be a noticeable amount of power and the 40c will be 15-30Deg F hotter. if you must keep that motor you can definitely go 25C to cool things down and believe me you will still have plenty of power. (25C will be lighter, cheaper and cooler). I'd only go 40c+ if you were running a 1700-1900kv motor. I realize if you are getting the hobby wing brand ESC your are probably getting the 2250 that is on their website too for a great price and they do not have alot of 1900-2050 motors. I did find this combo though: http://www.hobbypartz.com/07e-c-combo-m3a.html

I run a 1900kv 210amp (no fans needed) and batteries that are between 25-35C with a burst of 32-45C (depending on the pack). In the summer we regularly race in temperatures of 35-40Dec Cel and up so temps are of big concern to us around here. Our tracks tend to be tighter than European tracks, But even if I were to run on bigger tracks i'd go up to 2050kv and keep a lower C rating to balance temps. In September we are running 5hr enduro race with our Ebuggy. Last year's 4hr and we learned many heat related lessons with various packs of different C ratings, weights and capacities.

But, the final answer is yes it will work and the car will be extremely fast. And totally fine if you run in cold areas and/or you are just bashing. If you race hard long races or in hot regions and get some high temps, remember this post and you'll know why.

[jasonwipf]

As for run times this chart was compiled from the feedback of several dozen racers in America's most active RCforum and averaged on an excel spread sheet to give some good approximations. http://www.oople.com/forums/showthread.php?t=37230

These were American tracks so for European tracks and what I have read from other people commenting on OOPLE about their run times; I'd figure Euro averages to be on the upper end of the mah/min spectrum. (Higher mah consumption due to faster bigger tracks)

In the 4s category for example the average is around 240mah/min on tight tracks without extreme conditions, I run 280mah/min avg. in extreme heat on small to medium tracks personally. From Everything you told me, you would be between 270-320mah/min if you drove in hard race conditions, giving you 15-17min at most.

[Mugenextreme]

Thanks jason and everyone for your input.
Have order the hobbywing 150A and the lower 2000kv motor. Picked up a 4s 6000Amh 25c cont - 50c burst lipo pack should give me bit more run time. May change the gage of the wire to a smaller awg to dull the motor a bit more if i find it to powerfull. Will have a go once it all arrives.

[jasonwipf]

you will not notice any difference between 10g and 12g except that the 10g may be harder to soder since it so think. 14g you might notice a difference but wires too thin will get hot and might unsoder themselves. 12G ideal

[dodgydiy]

you can limit the power using the speedo anyway so dont bother with changing wires, just turn the timing and punch down using the program card

personally i am using loong 4500 batts, 6 cell on 1400kv heli motor, it goes really well, not over powerful like some, but plenty fast enough for me. dont know what run time in a race, but managed 35 mins on local track last year. motor is only 1600w, looking at the specs of some motors out there and some are 2500w or more!

[Brooks]

I am using the Intellect 5400MAH 4s lipo http://cgi.ebay.co.uk/Intellect-Lipo-Battery-5400mah-35C-14-8v-Hard-Case-HW4S-/260752710204?pt=Radio_Control_Parts_Accessories&hash=item3cb6129a3c and they last me 12 mins full bore or 20 mins + if i take it steady :thumbdown:.

I have been using the Orion 6900MAH 4s lipo and that will last me 30 mins + but it cost £190 :thumbdown:. Brilliant lipo, best lipo i have ever tryed :thumbsup:. I am running a standard losi 8ight 2.0 with the Xcelorin speedo and 2100kv motor.
Hope that helps
Chris