Lipo question

[Matt 07]

Ok so im converting my hyper 7 to electric and i need some lipo suggestions, i will be running one pack

Ill be running mamba max esc along with the feigao 540 8l so i need either 2c or 3c lipo

my instincts would tell me to go with 3c for more run time and power although i think it would weigh more than the 2c

Do lipo's need discharging, if so can you suggest a good charger/discharger in one

and also what is a balancer and will i need one, if so plese suggest one

My buget will be around £175 - about $300

Im a complete newbie to lipo so thats why the questions will seem noobish

Cheers,
Matt

[Serum]

Welcome to this forum Matt!

An 8L on 3S pushing an hyper 7, that might be a current hungry setup for sure!

It is possible, but it's not a setup i would recommend in the first place.

Normally, a 4S setup in a buggy would do great. Allthough; i had great succes with a 7XL on 3S in an e-maxx. but this was truck was going about 30-35 km/h

[Matt 07]

alright cheers for the info what motor would you reconmend i was thinkin the 8xl also not sure though im new to brushless

[Serum]

Yeah, either a 7 or 8XL on 4S would do. The 8Xl would be the best choice.

[Matt 07]

so 4c disbaleing the BEC and Get a descent UBEC looks like what ill be doing then Cheers for the help

Will i need a discharger?

or balancer but ill only be running one 4c pack rather than two 2c to save room.

Cheers again,
Matt

[Sylvester]

Do not get a discharger for lipoly packs, cycling them is one of the dont's in the lipo rule book.

[Matt 07]

K cheers, what would i set the cutoff voltage on the MM Esc for the 4c pack then ?

[Serum]

It's 4S instead of 4C, the C rating stands for something different, read the sticky about brushless in general in the brushless section.

But with lipo's you can go to 3V per cell cutoff. 3.1-3.2V per cell is the way to go to be easy on the cells.

[Matt 07]

Ok cheers i use c because i think of Cell and abreviate like that, but thanks for the correction

[BrianG]

I don't think it's so much a "correction" as making sure you use the proper lingo because other people won't really understand what you mean. The "s" is series cells if that help you visualize it better...

[BP-Revo]

Well, you must also realize that referring to the number of the cells in a pack cna refer to many different types of cells.

An 8 cell lipo can result in 8S1P, 4S2P, 2S4P, or 1S8P (though the last one would almost never occur).

So, one must designate the type of wiring.

Otherwise, for a 1/8 scale buggy a 4S Lipo setup with an XL or high turn L seem to work well. Also consider a Neu 1512 series if you haven't purchased a motor yet, they seem to be a nice combo in 1/8 scales, but beware since Neu's don't seem to like Mamba Max controllers all that much (if that happens to be your choice of controller).

[MetalMan]

Right now I'm setting my Hyper 8 Pro with a Feigao 8XL (purple one), Mamba Max, UBEC, 4s 5000mah Lipo from Maxamps, and a custom motor clamp. The gearing is 18/46, and the estimated top speed is 41mph. It should be perfect for the local track.

[glassdoctor]

That's dead on what my setup does... 41mph w/same gearing, @same kv, etc... it's a very fast setup but still good for a big track.

[jnev]

That is also going to be my set up, lol. Except that I will run an 8000mah battery instead of the 5000.

[gixxer]

I am running a 9xl with 16/44 gearing. If you guys dont have problems running an 18 tooth pinion then it sounds like I can gear higher. I will also be running the 5000 maxamps pack, when ever it finally gets here. :)