lipos 2S or 3S?

[8ight-e]

RcPocketRocket isnt MMM and 2650 motor only capable of running on 4s and the 2200kv is the one that can do 6s ? Just asken bc im town between those two motors and i want to be able to run 6s Thanks

The 2650 is actually ideal on 3s, and pretty insaine typically on 4s as you normally can't gear low enough for it on most vehicles.. including this one I'd guess around 50 would be the lowest, but I can't verify this due to we dont know the min/max gear options yet. The 1y is brutal on 6s lipo and near it's max output potential. Even on a erevo or truggy 4s is more than enough for bashing racing and capable of 50 w/o issues. At 6s it's just retarded fast... If you really want 6s lipo I'd suggest a 1300-1600kv motor; tekin, neu etc.

[RcPocketRocket]

RcPocketRocket isnt MMM and 2650 motor only capable of running on 4s and the 2200kv is the one that can do 6s ? Just asken bc im town between those two motors and i want to be able to run 6s Thanks

Its a little smaller the actual motor but it runs 6s no problems for me @ all.
They say to watch the temps a little more on 6s so far I have maxed out only at 140F and the motor can take 200F before you start to ruin the magnets.

[Redman65]

If you guys drove a good set up on 2s at a track, you wouldnt touch the 3s truck again.

You're right. Battery quality is important. I will spend more money for that quality. Seen cheap lipo's and I won't waste my time or money.

[filmmaker]

Ok.. in need of some help on how C rating will affect Punch ? I know more is usually better, but wouldn't there be a point when you have plenty. On a Stock traxxas brushless system like in the Slash 4x4, I have read it will draw approx 65amp max (again, I am only going by what I read).. A 20C 5000mAh 2s has this covered.. Would a 30C really give you more Punch.

thanks yet again.

these motors can pull over 100amps!
you mostly wont get to that, and I would say go with the 30c.
the batteries will provide better power and run cooler

[RcPocketRocket]

You're right. Battery quality is important. I will spend more money for that quality. Seen cheap lipo's and I won't waste my time or money.

I will agree on the 2s for the track for most. Here is the thing to make 1HP it takes 746 watts. So on 3s 11.1v its going to pull 67.20amps from your battery to make 1hp.
on 2s its going to pull 100.81 AMPS to make that same 1HP.
This is why I like to run the highest voltage available on the controller. Less amperage = Less heat before the controller. There is a little more to this also benefit wise but it is small.

[filmmaker]

I will agree on the 2s for the track for most. Here is the thing to make 1HP it takes 746 watts. So on 3s 11.1v its going to pull 67.20amps from your battery to make 1hp.
on 2s its going to pull 100.81 AMPS to make that same 1HP.
This is why I like to run the highest voltage available on the controller. Less amperage = Less heat before the controller. There is a little more to this also benefit wise but it is small.

Hold up...
going to 3s does not mean you will pull less amps..
It can and will pull more amps on 3s
these motors can peak over 100 amps all depending on gearing
if it does pull 100 amps on 2s thats right at 740 watts, and not changing gearing you could pull 1110 watts on 3s!
the only real way to pull less amps on higher volts is to run with a lower kv motor of the same size, also gear way down for the higher rpms will help on the same motor running 3s but will not run like a lower kv motor on 3s geared the same as the VXL on 2s

[filmmaker]

You're right. Battery quality is important. I will spend more money for that quality. Seen cheap lipo's and I won't waste my time or money.

there are some cheap lipos with high quality out there!
cheap price does not always mean cheap quality these days

[asheck]

It can and will pull more amps on 3s

Pocketrocket had it right on. ( you kinda say this, but you are all over the place with it ) When geared for the same speed your amp draw will be less on higher voltage. When geared the same , your amp draw increases as the voltage does. I run my VXL exclusively on 3s. Geared for 50mphish it is all well within it's specs, and imo at it's most efficient point. As long as you are in your motors efficiency range, the gearing is much more important then your kv. Some motors are happier in the 50000 rpm range,Novaks, some the 20000, kb45.

BTW this is not a MMM system. Big amp setups are not needed. These run fine on Nihms. Any Lipo over about 60 amps will be fine.

[filmmaker]

Pocketrocket had it right on. ( you kinda say this, but you are all over the place with it ) When geared for the same speed your amp draw will be less on higher voltage. When geared the same , your amp draw increases as the voltage does. I run my VXL exclusively on 3s. Geared for 50mphish it is all well within it's specs, and imo at it's most efficient point. As long as you are in your motors efficiency range, the gearing is much more important then your kv. Some motors are happier in the 50000 rpm range,Novaks, some the 20000, kb45.

BTW this is not a MMM system. Big amp setups are not needed. These run fine on Nihms. Any Lipo over about 60 amps will be fine.

Not even close...
I'm the one who said you need to regear if going up with cells..
And using a lower kv motor on higher cell count to get the same rpm is the way to go to pull less amps..
If adding more cells is better why not just go 4s, 6s or?
And kd45s don't like 50k rpm all that much, those motors do best under 40k

[filmmaker]

One will learn fast running FE Boats on kv and cell count
What's best and what let's out the majic smoke. Lol

[filmmaker]

Re gearing lower and go with 3s works good

[asheck]

My statement is not only close, it is right on. Please reread what I wrote, because judging by this statement you did not comprehend it.

And kd45s don't like 50k rpm all that much, those motors do best under 40k

My statement

Some motors are happier in the 50000 rpm range,Novaks, some the 20000, kb45.

Means that you can not just lump sum motors, that they all like x amount of rpm's. Novak motors generally are most efficient in the 50000 rpm range, a big motor like the kb45 is gonna do best in the 20000 rpm range. You should match your kv, with your voltage used, to have your motor in the most efficient range. Then match your wattage needed to the motor size. We'll leave out poles for now.

For the VXL motor the efficiency is pretty closely matched between 2 and 3s, but I believe falls more on the 3s side. You might have boat experience, but I've been running brushless rc's since, well before most people knew what a brushless was. I have had the VXL motor since it's release, and have tuned and ran it in a variety of vehicles.So I know exactly what I'm saying, from experience.
Since RCPR's first statement clearly says that the motors are making the same power, then his statement is correct, you will be pulling less amps with 3s. You come back with this.

Hold up...
going to 3s does not mean you will pull less amps..
It can and will pull more amps on 3s

Then my statement says,

When geared for the same speed your amp draw will be less on higher voltage. When geared the same , your amp draw increases as the voltage does.

Which is not only close, but right on.

[filmmaker]

Yes you are right when geared for the same speed higher volts will pull less amps..
and boats pull way more amps constant that what cars and trucks, so paying attention to amp draw is very important when setting up a boat..
KV and Volts very important when building a boat, same can be had when building a cool running truck

and again my comment was not started by yours but from someone else
and at that time no one made the statement that you need to regear to pull less amps when going up in volts, I was trying to help to let some know to regear when going up in volts or you will pull more amps

[asheck]

I know your comment was at someone else. But his statement was correct , since he was talking about making the same amount of power 1hp. Your response was confusing, and I added clarification, which then you said was not even close. But it now seems we are on the same page, so people aren't confused.


So the bottom line is. That your motor will be drawing less amps, on higher voltage, to obtain a certain speed. As long as that voltage does not take the motor out of it's efficiency range, your motor will run cooler because of this.

From my experience. The VXL is good on 2-3s, a Novak HV 4.5, which is what I'm gonna run, is good on 3-4s. Now, a good 4 pole motor like the MMM 2200/ 2650, has a very wide efficiency range, so really the choice between 2-6s is just how much power you need.

[filmmaker]

I know your comment was at someone else. But his statement was correct , since he was talking about making the same amount of power 1hp. Your response was confusing, and I added clarification, which then you said was not even close. But it now seems we are on the same page, so people aren't confused.


So the bottom line is. That your motor will be drawing less amps, on higher voltage, to obtain a certain speed. As long as that voltage does not take the motor out of it's efficiency range, your motor will run cooler because of this.

From my experience. The VXL is good on 2-3s, a Novak HV 4.5, which is what I'm gonna run, is good on 3-4s. Now, a good 4 pole motor like the MMM 2200/ 2650, has a very wide efficiency range, so really the choice between 2-6s is just how much power you need.

Agreed!
whats the kv of the HV 4.5?

[asheck]

whats the kv of the HV 4.5?

It's listed as 4800, in the shaft size that I have. They list the 5mm shaft as a 5000. But that is unloaded. Once you break it down it's really about 4000. Which seems really high. But it is a 2 pole motor with a smaller rotor then standard 36mm brushless motors. So it handles the rpm's good, you just can't place to high of a load on it.

[filmmaker]

Wow, 4,800 rpm!
is this light truck it should ripp

[1chucked]

3s = noobie choice
2s = people who race

I have some fast stuff, and like power....but I race. So 3s is pointless, its not a good feel for the track at all. If I wanna chase goats or impress people that never saw an rc, I would run a 3s. Its common knowlege that traxxas builds stuff for bashers and noobies(cheap and tough vehicles RTR) so they make them capable of what they want to do. The noobies go for extreme power to make up for lack of experience and it gives the feeling of being fast. I am not knocking anyone, just tellin ya why 3s will fit and who goes that route.

I agree with this but I still run 3s. I have both, I usually use the 2s batteries for bashing, but if I want to drag race or whatever I throw the 3s in. In the past I've also put my throttle end point back at say 60% or so with the 3s to make it drivable.