more random BL/Lipo/MMM stuff; questions
 

Well, I know it's me, but the more I read regarding BL setups (I'm coming from the world of nitro), the less I feel I understand. All I know is what I'm trying to achieve (I guess that's a good thing!) but I still feel lost!

-Are those Zippy R packs any good? They seem much cheaper than the packs usually mentioned.

-Are those Turnigy ESC's ok to use? They're cheap too, and that other guy on this board is sending a monster truck into outer space with his! :smile:

-Do I really need to get the MMM instead of the Turnigy? If it's worth it, then I'll pay the extra money and wait too, but is it worth it?

-hobbycity has a few AC/DC lipo chargers. Are they ok? I don't really want to have a charger and a seperate power supply if I don't need to.

My head is spinning, somebody help!

The turnigy esc has a slow spin up time from dead stop but once it it running it is supposedly fine. The MMM won't handle as much voltage but can handle more amps and is better suited to car applications. As far as chargers go I use a Bantam BC6 and the hyperion chargers have a good rep around here. Not sure about the hobby city chargers.

1) Probably, haven't tried those exact ones, but have used similar prices chinese cells that perform very well, havent tested the discharge ratings though. The ones mentioned on here are usually all korean cell based, which have a reputation for better quality (ie more accurate C ratings or less voltage drop under load).

2) Yes and no. Yes if all you want to do is do high speed runs. No if you ever want to drift or jump with confidence. The reason for this is they are designed for aero use and have a super low torque soft start (Which cant be disabled, it is very soft even when in 'normal' start mode) to protect fragile aeroplane gearboxes. With aircraft you tend to hold a fairly constant throttle. With land vehicles you tend to be braking and blipping the throttle a lot, and the soft start gives you quite a significant delay in throttle engagement (ie if you go from coasting to throttle to try and balance the car in a drift, or blipping the throttle to balance the car in mid air). This means unless you can compensate for this delay (which you cant really, you dont usually know your going to have to blip the throttle to bring the nose up in mid air before the nose actually starts diving), you will find it very hard to drive and jump consistently with. For racing there is no way you could get away with one. For bashing maybe, depending on your bashing style (if that makes sense..)

3) Put it this way, if I'd have known how bad the delay was in the turnigy HV esc (which I assume your talking about) I would have planned my whole conversion differently - maybe even never have gone electric in the first place! So YES, I would highly recommended spending the extra $$ for the mamba monster. If you still want to go with the Turnigy I have two I want to sell (with programming cards) that I'm more than willing to part with.

4) Can't really help you with this one, apart from say that I've had bad experiences with those cheaper no-name chargers, but cant speak for all of them.

I hope you gleaned something of use from my rants! :)

I originally thought this too, even after owning and running one. But my test runs were driving around on the road, getting the gearing right etc. It wasn't till I tried jumping and actually drove it on the dirt that I realized how bad it really was.

Zippy-K seems pretty punchy sqweezing more watts from 5000mah 21C-30C than from 8000mah 10C-15C TrueRC battery but their rate are different too. Anyway I cant say anything bad yet, still have full capacity and no any puff sings after 10 cycles, BUT take a look on PolyQuest i noticed that price difference not big,Zippy-K ~$50 less by same mAh and 4S packs, maybe becouse I am platinum member... I dont know. But IMO PolyQuest worth extra money! If price difference is way more, Zippy-K are OK. I am pretty satisfied with Zippy-K (Check price difference then you are Logged in, personal price can difference from not logged user)

Turnigy ESC not suite very well to car, First its SLOW and have stupid delays second dont have Reverse/Brake-needs to use mechanical. If you plan to use on HighVoltage setup and do speed runs its OK.

Yes MMM is designed for CAR and if you want solid good BL ESC wait MMM and not cost so much if compare to other CAR ESC brands (MGM, Schulze, Quark etc)

I dont know about HC chargers dont have experince but on HC forum couple guys had problems with some sort of charger recommend to check forum before. And Like MTBikerTim mentioned Bantams bc6-10, Hyperion especialy 0610i have good reputation they are not so expensive and they are powerful!

A point about the Turnigy that people have touched on is the fact it is made for air use. As such, it doesn't have brake or reverse. The MMM has those. Also, car ESCs tend to have a higher burst current rating since the current draw in our setups tend to be very "peaky".

http://www.hobbycity.com/hobbycity/s...idProduct=6408

This is a rebaged hyperion...

From the user reviews at the bottom of the page, it looks like it has a 50w power limit (limited to 2.2A @ 22v). So, when shopping for a charger, you can't just look at voltage and current only. Even at 4s, you'd be limited to around 3A.

Yep - never noticed but yes 606i is 50w

http://media.hyperion.hk/dn/eos/EOS0...dc)-MAN-EN.pdf

I'll have to look at this when I charge my 5k 4s packs

How much do you want for one of those turnigy esc???

Heh Hyperion is hong kong based anyway, kind of weird to see a 'rebadged' one. Im not sure if I trust when people write that though, the iMax B8 was also apparently just a rebadged bantam, but anyone who bought one learnt pretty quickly that that wasnt true. Same was said for the GT Power A series, I havent heard much about these yet, but for some reason hobby city decided to start stocking the actual e-station brand name ones in the end anyway. I've learnt about that stuff the hard way. About 50 times now. I'm not taking any more chances buying cheaply made 'rebadged' versions of top end gear thats for sure! :)

I've sent you a PM (well am just about to :P)

I have a imax b6 charger and I love it, no complaints about it what so ever, I even got the imax ac adapter so I can charge inside the house too. Its also a very easy to use charger that has alot of safety features on it too, plus it charges A123 cells too, not bad for a $65.00 charger.

I have zippy-R 4s 4500mah and zippy-H 6s 4000mah packs both packs deliever solid amps and work fine charge after charge. The only thing you have to worry about with these packs is their size as they are meant for airplane useage. So double check the pack dimensions vs how you intead to install them on your car / truck because in my experience they are longer & skinny'r than your average lipo pack ie... max amps or something.

And I also have the HV turnigy esc, yes they work great no cogging etc etc, and yes they have a really slow delay from a dead stop so if you think that is going to bug you save the $$$ and get the monster max.

in regards to the turnigy.. I don't notice any slow startup... I always adjust the throttle range, and it always seems fine to me... I will go home and check it out again... I don't have that delay anymore... are you all experiencing this? Either that or I'm just full of sh*t.. :)

Did you tried anything else i mean real car ESC to feel and compare?

Easy thing just pres fast full trotle and realease and multiple time do not hold throttle and you will see that controller not react immediatly. Try that do with car esc its scary and you feel that it can blow your tires its spin up almost instantly.

I heard its possible go around this if you set up in radio throttle position that way then you release trigger, car motor still spins a litle bit it not stop actualy. But this is possible to do only with electric "tekno" clutch like here
http://i142.photobucket.com/albums/r...3/01010046.jpg