here's a big pile of questions: need setup advice

[mk351e]

OK, so just a quick refresh: I'm COMPLETELY new to BL; I'm coming from the 1/8 nitro world. I NEVER race, I just kinda bash a little, jump a little, drive on grass, parking lots, and sometimes go to a bmx trail and ride with my buddie's jato. NO racing, just messin around (not really bashing - I don't beat on my cars). I DO NEED to be able to at least go as fast as my italian big block nitro buggy, but I really want to be able to hit warp speed when I find an empty parking lot! HOWEVER, I also want something that runs reliably, every time I use it, as in MINIMAL maintenance. Like a Toyota or a Honda :) I don't want to be monitoring/ worrying about temps all day long, hence, the Neu motor.

The vehicle is a Muggy. Yes, I know, not the best choice for high speed runs. That's ok!

I'm thinking something like this:
Muggy/ mech. brakes/ MMM/ 6S Zippy H 5000 mah/ Neu 15XX/ and a XXT pinion! I know, it's vague, but I made some progress.

Soooo, here's my questions:
1) will 6S get me to warp speed?? (~60mph?) Do I need more than 6S?? Is 6S a dumb idea, or am I on the right track?
2) any idea how much runtime I can expect from a 5000mah 6S??
3) which neu motor? I'm thinking 1521/1D (2900kv), but I'm not sure why. Maybe a 1527/1D (2300kv)? Or a 1515/1.5D (2700kv)?
4) is the MMM going to be enough?
5) what size pinion??
6) where do you buy these hyperion chargers? I can't find em, and RCM only has like 1 or 2. Where can I find the whole line?


Sorry for all the questions and hella long post, but I swear I'm making progress!

Originally Posted by mk351e

OK, so just a quick refresh: I'm COMPLETELY new to BL; I'm coming from the 1/8 nitro world. I NEVER race, I just kinda bash a little, jump a little, drive on grass, parking lots, and sometimes go to a bmx trail and ride with my buddie's jato. NO racing, just messin around (not really bashing - I don't beat on my cars). I DO NEED to be able to at least go as fast as my italian big block nitro buggy, but I really want to be able to hit warp speed when I find an empty parking lot! HOWEVER, I also want something that runs reliably, every time I use it, as in MINIMAL maintenance. Like a Toyota or a Honda :) I don't want to be monitoring/ worrying about temps all day long, hence, the Neu motor.

The vehicle is a Muggy. Yes, I know, not the best choice for high speed runs. That's ok!

I'm thinking something like this:
Muggy/ mech. brakes/ MMM/ 6S Zippy H 5000 mah/ Neu 15XX/ and a XXT pinion! I know, it's vague, but I made some progress.

Soooo, here's my questions:
1) will 6S get me to warp speed?? (~60mph?) Do I need more than 6S?? Is 6S a dumb idea, or am I on the right track?
2) any idea how much runtime I can expect from a 5000mah 6S??
3) which neu motor? I'm thinking 1521/1D (2900kv), but I'm not sure why. Maybe a 1527/1D (2300kv)? Or a 1515/1.5D (2700kv)?
4) is the MMM going to be enough?
5) what size pinion??
6) where do you buy these hyperion chargers? I can't find em, and RCM only has like 1 or 2. Where can I find the whole line?


Sorry for all the questions and hella long post, but I swear I'm making progress!

with a 6s pack I would go with a 1515/2.5d (1700kv) and the MMM will be plenty, expect upwards of 30mins of run time depending on your spur/pinion setup

[jnev]

1) 6s should be plenty. Its perfect for bashing.
2) It all depends on how you drive, but you can get about 40 - 45 minutes probably.
3) A 1527 will be way to powerful... you won't even be able to go full throttle, you'll just be wheeling all the time or break parts in the diffs/tranny. The 1521 and 1515 motors you mentioned has too high a KV in my opinion for that voltage. If you want speed but still be reliable, the 1515/2d would work well, or the 1521/1.5d. And they would both give you incredible speed.
4) The MMM will be perfect for this application.
5) Use this calculator to find the gearing you want: http://www.scriptasylum.com/rc_speed/_top_speed.html
6) Mike can sometimes special order them, but you can also buy them at maxamps.com or I am pretty sure amainhobbies.com also sells them.

Edit: He beat me to it.

[dirt101]

The MMM is unproven, but going by stats it should be nough. personally if I were you I would get a lower k/v 1521. somewhere around 2000k/v(I dont know the names).

60mph is fast and i think 55mph would be a better goal, but 6s is a good idea.

[jzemaxx]

What is warp speed to you??? Some people are happy with 50mph, some aren't. The suggestions so far are solid and you can't go wrong with a MMM.

[jayjay283]

lol i typed this up and got booted, always a dollar short and day late but seems alot of my opinions are close so Im not a total tard

1. yes 60+ geared right, 6s will rip and is the MMM max., No, yeah
2. 25-35min depending on driving
3. All great motors but more 5s lipo motors IMO, id go with a slightly lower KV motor for 6s, since you have a muggy you will most likely be using 1 lipo brick ? you want the rpm to not be over 60k max and more around 50k for speed + reliability, multiply the volts x kv = rpm
4. more than
5. use the calculator to see the speed you want http://www.scriptasylum.com/rc_speed/_top_speed.html
5. maxamps.com has them for pretty good prices, but easily found by typing hyperion into a search engine or checking airplane/heli sites

I figured id throw in my 2 cents these are my opinions, this place is full of dudes who totally know what they're doing so I figured I'd start and they can tell me what a cretin I am

[mk351e]

ok, so my motor choice may be off, but what I don't understand is WHY? As in WHY do you choose one particular motor over another? ESPECIALLY with a Neu - I mean, you've got 15xx series, and there's say, 50 of them. Many have kv ratings very close, but they're different sizes, so WHY do you guys choose one over another???? I just don't get it!

Also, why don't I want those higher kv motors? they're gonna be faster, no?

Why is picking out a motor proving to be so difficult for me??? It REALLY shouldn't be, should it?

[mk351e]

AHHH jzemaxx! I hoped you'd chime in! Your project is SICK (in a good way) with that there MMT truck!!!!!!!!!! But aren't you spinning your Neu motor past 60k?? and getting away with it?

[Patrick]

This thread could be relevant to you. http://www.rc-monster.com/forum/showthread.php?t=10316
This is the vid from that thread. http://www.youtube.com/watch?v=bo7GdkNpKAY

[jnev]

Yes higher KV = faster. But it also = more heat = and depending on how high the KV is, it could also = way to high RPMs.

Plug in all the values I linked you in my previous post. It will help you understand the differences in each motor.

[jzemaxx]

Originally Posted by mk351e

AHHH jzemaxx! I hoped you'd chime in! Your project is SICK (in a good way) with that there MMT truck!!!!!!!!!! But aren't you spinning your Neu motor past 60k?? and getting away with it?

I'm spinning a 1521 to right at 71K. Not something I suggest doing, and neither does Steve over at Neu, but I don't care if they blow up.....lol. For someone that doesn't want to replace them often, run them 60K or under . Still will make TONS of power. Also the higher KV motors draw big time amps and will make less torque then a lower KV motor.

[lincpimp]

Ok, keep in mind that the longer can motors make more torque. It seems like mosty use a 1515 for a mt or truggy. Your muggy will most likely be heavier than a std truggy, so the 1521 may be a good choice for you. I would say that around 45k rpm is good for the motor, so at 6s lipo=22.2v you will want a 2000kv motor. 2000kv x 22.2 = 45k rpm (or so)

You battery choice sounds good, I would think that you will get somewhere between 25-30min with that pack, considering vehicle weight and gearing. Having the truck geared for 60mph may cause some issues during regular driving. I would say to have gearing setup for about 45mph regular, and have a larger pinion you can put in for speed runs. The lower gearing will cause less heat, and offer better runtimes.

[jayjay283]

lol jze, he not for racing, reliable just for goofing around... not drive it on an abandoned airstrip !!

[jzemaxx]

Originally Posted by jayjay283

lol jze, he not for racing, reliable just for goofing around... not drive it on an abandoned airstrip !!

Hehe, I'm all about flat out stupid speed. If its not faster then the speed limit, its boring....haha.

In all seriousness, a 1515 is probably more then enough. Most emaxx's are 12-14lbs depending on setup and the guys running the 1515's are flying and with the right gearing you can bash all day with no problems with heat.

Here is a video of a 1515 Emaxx on 6S......thats is sick fast across the grass.

http://www.youtube.com/watch?v=EoOlsYrUF5s

[zeropointbug]

Yes, i agree... I have a my setup which is running 7s2p A123 on a 1512 Neu 3D(1700kv.), so thats 23volts @ a hair under 40k rpm; and I was able to achieve 50mph no problem. The motor was still only 160F after a full run.