Muggy Conversion
 

I'm thinking of doing a Muggy conversion. Can I run a Neu 1527 1D, MMM, and 4S 6000MAh 20C geared for 40? What do you think? Please, help me understand more about the amp draw that you all refer to in setups.

I am thinking a 1521/1y with 6s lipo would be plenty, the motor will have a higher amp draw then a 1515 motor of the same kv so you might want a higher mah rating than 5000

A 1521 1y would be the best bet. I am guessing by 6000 20c you are refering to maxamps? No way that pack will stand up to a 1512, let alone a 1521. You need something good, like an enerland cell based pack. 5000 25-30c 6s lipo will do. FP, TP, polyquest, polyrc, neu energy and hyperion are what to look for. Mike also sells some packs under the rcmonster name that perform well.

4s is a little weak for a muggy... I think you should go with at least 5s, and 6s is your best bet. 4s in a muggy is like 3s in a 8ight. almost. :gasp:

8s wouldn't be too bad of an idea.:whistle:

I'm all for 8s-10s. Use a LT-10s esc and a neu 1521 or medusa 80mm around 1100kv for 8s, or about 850-1000kv for 10s.

I already have the 1527 1d that I got for a steal. What setup would it be good for? I can get better batteries.

I'd say 5s in the 8000-10000mah range.

Old motor > trade/ebay > new motor with a more suitable kv/ size = best results. :yes:


Havent we had this discussion about why your particular motor is far from ideal before?.... :neutral:

From what some of the other members here have found, the 1d 1527 is an "amp hog" so it may be best to try to swap it out for a lower kv motor, and then run 6s. It will pull so big amps on 4s. You will have to run at least 2 4s packs in parallel, something like the 4500 30c enerland cell packs, to give you enough amp reserve. Not sure what esc you plan to use, even the MMM may not be enough...

Thank you!!!!!!! How do you figure out how many amps a motor will draw?

the 1527/1d is capable of 2250 continous watts and if you ran 6s that would be in the neighborhood of 100 amps but the kv would be too high for 6s at 4s you would be pulling 156 amps...everything would be VERY toasty

1515 maybe?
 

I've got a 1515 2.5d in mine on 5s. It's easily as fast as the truck (or the driver) can handle. Anything bigger is just overkill - not that there's anything wrong with overkill.

Watts divided by volts will give you amps. conversely amps times volts gives you watts. You also have to figure that the system will only be around 70% efficient, so your batt needs to be that much more capable.

Say you have a motor that can pull 2000 watts. On 6s lipo your batt would need to be capable of 90amps - 2000/22.2=90

But you have the efficiency to think about, so 90/.70 = 128, so you would need a batt that could deliver aroound 128 amps cont, and not drop the voltage below 3.7v per cell. Most lipos do experience voltage drop nearer 3.2v per cell and heavy load.

So something in the neighborhood of 150 amps cont will cover voltage drop, efficiency losses, and poor math...

Always good to state your lipo choice too, as many packs are rated much higher than they can deliver, and the only way to know that is thru experience...

That is what I was looking for. Now, I want have to answer so many questions. Why has Brian G. not added something like this to his speed calculator section.

To calculate what your batteries are cappable of is C rating/1000 * MAh = continuous amps ability of your batteries. Here is where experience comes in because the C rating varies from company to company and some fudge here. Am I right? I think I getting this now. I have a Master's degree in math, but it is for education not engineering/electrical. I'm a math teacher/assistant principal and I share a lot of what you guys teach me in the classroom. The students love it. Several are helping me build a huge track on my land. We live in the country.

Yep, that is correct to get amp ratings.

A correct C rating is vital to battery selection, but the resellers do lie to make their products more attractive...

Generally speaking the only Chinese packs I would suggest are True RC and Zippy, as their ratings seem to be solid and true. Not sure where the RCM lipo cells are from, but they have honest ratings too.

Any enerland mfg cell is a good bet too. These companies use enerland cells: Thunderpower, Flightpower, Neuenergy, Polyquest, Polyrc, Hyperion, and Outrage (not 100% on the last, I have not personally taken them apart). Pretty easy to tell an enerlan pack, as it will have the solder tabs at each end, where all of the chinese cells that i have seen have the tabs side by side on one end.

Enerland cells are built to tighter tolerances and have better quality control. So you have a better made cell that is matched to the other cells in the pack properly. So the pack will stay in balance and perform well. Once you hold a single enerland cell in your hand and a chinese cell in the other you can really see and feel the difference...

Glad to hear that you involve the kids in the hobby! Have fun with the track!

Ain't that the truth...

The Elite cells, which are Chinese also, are very well regarded. In fact, they are the kings of a 30c discharge test floating around online, besting even the Enerland cells.

Forgot about elite. I need to get a 6s pack and give them a hard run...