Need help on brushless motor choice?
 

Heres the deal i know it was way to much voltage but i used 2 3s 2200mah 11.1v lipos on my mamba max and 8xl. It worked for about 5 min tried reverse and a puff of smoke fun over. Now my esc leds jus flash like krazy dont know if it was the motor or esc that smoked? but it halled ass my ? is i ordered a set of 3s 20c 5000max flightmax lipos and a monster mamba v3 should i try the 8xl if it ain't fried or get a diff motor? And what ones will work and last a while oh yeah its on my e revo.

Worth a shot with the 8xl.. not going to last long on 6s. Your best bet is to get the 2200kv combo.


The reason your esc smoked is becaus they are rated for 25v a freshly charged 6s pack is 25.2v. When you went into brake/reverse it regenerated voltage and blew the esc up

Ditch the 8xl...for a few $ more go w/the Medusa.I would recommend for a 6s application the 70 series Medusa 1600 kv, 2000kv motor....Or the mmm 2200kv combo package

Welcome to the forums!

so if u use my 11.1 lipos on the mmm it should be fine since there 25.2v? also what motor should i get around 1600 to 2200 kv castle neu or medusa?

2 11.1 li-po's should be fine....motor choice depends on your budget. I have a 50 series Medusa on my daughter's crt.5 and it is also terrific. Medusa is a great motor choice.
The castle combo is a great deal...in your case I'd go w/the 2200kv castle set up on 6s.

MMM V3 2200kv combo on 6 cells is the way to go.

Voltage is not the issue. It smoked because his LiPos were under-rated for the motor. 2200mAh (assuming a 30C rating) is only 66A continuous. The 8XL is gonna eat them for breakfast, and ask for seconds! CC has said repeatedly that under-rated batteries cause EM spikes in the ESC and will fry its brains. If the motor blew there would have been more than a "puff" of smoke....

Oh, and the new batteries will run that motor much better. But then it will be toast. :lol:

can u use 6 cell nimh with brushless?

Sure, just do not expect to get the full potential out of the system. Something like a sidewinder 4600 combo on 6 cell nimh in a pede/rustler with gearing for around 30mph would be fine.

thanks for the info another thing can u use lipo with brushed?

Sure, voltage is voltage. It might wake up the brushed tho from the loss of weight and efficiency of batteries.

sorry what do u mean by wake up? will it damaged a brushed motor

You might notice and increase in performance. Just make you that you're running the right voltage.

yep i think the max voltage on a stock e-revo is 16.8v so about 4s lipos

Definitely! You'll enjoy 4s in the Emaxx. Longer runtimes, less weight, good speed.

Pair of 2s lipos in series is best for the emaxx (old or new emaxx?)

Whatever brand you go for, just avooid maxamps or ebay 'no name' lipos- have a read of this little doozy:

Emaxx FAQ

I have one question though- when you said you ran 6s lipo on your mambamax & it blew up, did you have a an actual mambamax esc (and not an MMM/MambaMonster), as in, the one thats rated for 3s lipo, or 4s with some mods?... would explain the fire and flaming death it suffered.... :wink:

im getting an e-revo but do the same rules apply?
thanks for the info guys this forum has really helped me!

Exactly the same rules- they are mechanically 99% identical in terms of the driveline and power requirements. Only difference is that the erevo has limited space in the battery compartments, so your lipo choices are a bit more restricted- have a gander at this:

Erevo FAQ

thanks that was a great link i learnt alot. do u have any charger recommendations?

Funnily enough... I do. :smile:

Depends where you go to get one, since most stuff in the UK tends to be imported from the orient or the states, so prices are higher for the same item compared to what they cost abroad. That said, if you want a do-it-all charger that is simple to use and doesnt cost a fortune, you have a few choices:

Hyperion 606i
Bantam BC6 (I have one of these)

These have a built in 12v power supply so you dont have to find a seperate one and hook it up; the only downside is it limits the charge power so something like a 5000mah 4s lipo will take about 1.5hrs instead of the usual 1hr. Thats not an issue for me personally but some people like a really quick turn around time so they can get out and bash their truck again asap.

I would google for the best prices- the bc6 is much more common in the UK (~£120), but the hyperion may be hard to find so importing would be your best option. This assumes you want a lipo capable charger and not just a nimh charger, but it makes more sense to get a better charger now rather than spend more £ upgrading later.

yeah
but i might have to do that cus i wanna get it running asap.
do you know of any dual chargers? lipo capable

Naturally... :wink:

http://www.allerc.com/product_info.p...oducts_id=3976

Not cheap, and requires a BIG powersupply as it doesnt have a built-in one, nothing that powerful has a built in one really, but you can buy them fairly cheaply, or make your own from an old PC powersupply (something in the 300-500watt range should be about right, but the more wattage the merrier).

You can also buy/make special harnesses to parallel two lipos together in order to charge them at the same time from a single charger, but its not ideal- better off with a pair of normal lipo chargers, tend to work out at roughly the same price:

£120 each for the bc6 chargers say, so total of about £250 once you add on the balance tap adaptors for each charger (£5 each or so).

vs

£200 for the duo charger, another £30-50 for a powersupply (at least, some of the higher powered models are upwards of a 100 squid ), plus import fees and shipping as you wont find those in the UK baring a miracle.

Nice thing is most can be ran from a 12v car battery, which is ideal for racing tracks with no mains power.

why not try the neu 1415 1y? http://www.castlecreations.com/produ...5/1415_1Y.html