2s vs 3s

[minirevobasher]

How insane is 3s? I have two 2s sky lipos and i just run 2s and it is pretty fast...... but i want to see how sweet 3s is. It seems that my esc goes into the low voltage cut off thing pretty quick, with my 1800mah battery.
My merv is bone stock, except for rpm front arms, so i was thinking i would be popping driveshafts and stripping driveshafts

[Petertje60]

50% more power. And you will notice that for sure. Not really 50% more speed, but it feels like it.

[50togo]

If you do 30 with 2 cell you will do 45 with 3 cell
That's better

[chilidillo]

Actually it's 50%

3S/2S=1.5

11.1v/7.4v=1.5

[tyqre]

I fyou only have 1800mah batteries you should think about running in parrallel with another battery to double your runtime.

[minirevobasher]

I fyou only have 1800mah batteries you should think about running in parrallel with another battery to double your runtime.

Its not that.
The1800 mah battery lasts me 3 runs. The low voltage or something like that comes on. I just wait for it to cool down then go run again. I do this about 3 or 4 times and it is still running.........
One question still remains........
Will i be braking parts on 3s?

[Jimmie Neutron]

Then it is not your low voltage... it is your ESC thermaling.

The ESC will flash codes when it is slowing or stopping...
I think you better find out what exactly is going on before you have a LiPo fire on your hands.

[50togo]

Its not that.
The1800 mah battery lasts me 3 runs. The low voltage or something like that comes on. I just wait for it to cool down then go run again. I do this about 3 or 4 times and it is still running.........
One question still remains........
Will i be braking parts on 3s?

some break parts on 3's some don't. It all depends on your driving style and terrain
When making more power sooner or later you have to upgrade the drivetrain

[Dadx2mj]

3s will wear out moving parts like bearing and drive lines parts faster simply because they are spinning at higher speeds so more wear. You will also be more prone to breaking parts when you crash because odds are you will be going faster.

[minirevobasher]

Then it is not your low voltage... it is your ESC thermaling.

The ESC will flash codes when it is slowing or stopping...
I think you better find out what exactly is going on before you have a LiPo fire on your hands.

It blinks red.

[mike-susieq1]

my neighborhas a mini and he runs his on 3s on grass all the time, he only has those 2 3s lipos he got with his merv. i told him not to run it on the grass with that lipo he will over heat and burn up his esc/motor which he has a fan on his motor but not the esc which both still get real hot not shutting off though but think its too hot. he was running 1 whole pack without lipo mode on and his lipo puffed but he is still using it told him to trash it but first discharge it safetly look it up online on how to do that. 3s is a hand ful and can cause you to upgrade more stuff than maybe you want to. i have plenty of power on 2s lipo and i see the difference from my nimh for sure.

[minirevobasher]

Ok I figured it out I think. It willrun for about 15 minutes and then go into lvd or thermal protection. What should I do

[Firemandan]

I ran strictly 3S when I used to run it, never had the ESC thermal. I would make speed runs and then make a slow run. On the street and grass all the time. I also made vent holes and had the heat sync on the motor. I don't remember the temps I would get with a laser temp gun or I would post them.

[joe831]

My single 2s 1550mah LiPo last me 35-45min

[minirevobasher]

My single 2s 1550mah LiPo last me 35-45min

Wonder whats up with mine..............

[50togo]

I run my in the dirt a bunch so I covered mine with screen.

[Petertje60]

Maybe the Lipo is not able to feed your system good enough which causes voltage drops. Which battery is it?
2 batteries in parallel might solve that problem.

[minirevobasher]

Maybe the Lipo is not able to feed your system good enough which causes voltage drops. Which battery is it?
2 batteries in parallel might solve that problem.

2cell 7.4v 1800mah 30c cintinuous/60c blast sky lipo

[jimbo74]

15 minutes sounds really wonky... what is your gearign setup? wheels and tires setup? other stuff in the drietrain can be causing the poor runtimes

[minirevobasher]

15 minutes sounds really wonky... what is your gearign setup? wheels and tires setup? other stuff in the drietrain can be causing the poor runtimes

Everything is stock except front rpm arms. Idk about pinion and spur, but i think its probably stock. The dude i bought it from said he only ran it about 10 times. He was pretty busy guy. Im going to charge a lipo and see what is coming in first; lvd or thermal protection. Its hot out though, about 90.
I will time the run time to and check the gearing real quick. What could be wrong with the driveline?

[joe831]

Try just rolling the car by hand and see if there is resistance/binding

[minirevobasher]

Ok. 50 tooth spur and i think a 30 tooth pinion. The pinion didn't have a marking on how many teeth so i counted myself...... heres a pic

[joe831]

I think that's the stock 28t pinion. It could be overheating if is very hot out and your driving on grass.

[minirevobasher]

I think that's the stock 28t pinion. It could be overheating if is very hot out and your driving on grass.

Will i was driving on grass and back flipping it...... i will go run it in the street this time and backflip off the curb i guess........

[mike-susieq1]

back flipping will heat the motor and esc up fast as you are taking off to fast and if you happen to hit the brakes too heat builds up fast like that too. gear down to 23t pinion to reduce wheelies or use better throttle control on your part

[minirevobasher]

back flipping will heat the motor and esc up fast as you are taking off to fast and if you happen to hit the brakes too heat builds up fast like that too. gear down to 23t pinion to reduce wheelies or use better throttle control on your part

Thats another thing. My merv couldnt do a wheelie to save its life! What the freak! My buds does wheelies no problems with stock nimh! and bald tires! ok i will get a 23 tooth pinion next trip to the hobby shop that i hate.

[50togo]

Sounds like you might need a 7152 new slipper clutch
and doing backflips are very hard on the diffs. Maybe a few spare ring and pinions 7079!

[mike-susieq1]

Thats another thing. My merv couldnt do a wheelie to save its life! What the freak! My buds does wheelies no problems with stock nimh! and bald tires! ok i will get a 23 tooth pinion next trip to the hobby shop that i hate.

what gearing are they using though? if they have gearing that is not stock 28/50 and have something like 32/50 or higher than they could do backflips but on nimh its hard to do. not sure how they are doing that. never did that with my stock nimh pack or my other nimh packs.

[minirevobasher]

what gearing are they using though? if they have gearing that is not stock 28/50 and have something like 32/50 or higher than they could do backflips but on nimh its hard to do. not sure how they are doing that. never did that with my stock nimh pack or my other nimh packs.

Not sure. Ill text him in a bit.

I just got running a pack until the lvd kicked in. I know it was the lvd because it was slowly blinking red and fast blinking red means thermal protection. It was a bout 25 min. When the lipo was done charging, i did notice it was at 1200mah. I guess thats right?

[targetingxmod]

And for wjhat i see that's the stock pinion (28tooth) and if the spur is 50t is the stock one.
You are getting thermal shutdown using what baterys?

-2s ?
-3s ?

Paralell 2s?
Paralell 3s?

In my experience using only one 2s lipo 25c the motor/esc will heat up more that 2s parallel, because of the added 25c+25c giving a 50c to the ESC

My experience show's that on a 16tooth with a trinitry 380 monster horsepower 8500kv motor and stock esc.
so i use 2s parallel for now and can run hardcore for more then 30 minutes... till they die!
On the end motor will be 60ºc on a sunny day.
But i pretend to gear up to the 28tooth and a 45 spur or keep the stock 50 spur...

Ok. 50 tooth spur and i think a 30 tooth pinion. The pinion didn't have a marking on how many teeth so i counted myself...... heres a pic

[minirevobasher]

And for wjhat i see that's the stock pinion (28tooth) and if the spur is 50t is the stock one.
You are getting thermal shutdown using what baterys?

-2s ?
-3s ?

Paralell 2s?
Paralell 3s?

In my experience using only one 2s lipo 25c the motor/esc will heat up more that 2s parallel, because of the added 25c+25c giving a 50c to the ESC

My experience show's that on a 16tooth with a trinitry 380 monster horsepower 8500kv motor and stock esc.
so i use 2s parallel for now and can run hardcore for more then 30 minutes... till they die!
On the end motor will be 60ºc on a sunny day.
But i pretend to gear up to the 28tooth and a 45 spur or keep the stock 50 spur...

You've missed some reading!
Im running a single 2s. It lasts for about 25 min on the street and about 15 min on the grass.
Last time i ran it though it didn't go into 50% power when it went into lvd. It just died.

[50togo]

Did you try charging it back up? Maybe its on it way bad

[minirevobasher]

I put it in storage mode for the night

[minirevobasher]

Did you try charging it back up? Maybe its on it way bad

I really don't think these lipos are going bad. But why would i run them in parallel? Thermal protection or LVD is still going to kick in at the same time right?

[mike-susieq1]

I really don't think these lipos are going bad. But why would i run them in parallel? Thermal protection or LVD is still going to kick in at the same time right?

thermal protection would kick in if its over heating but not the LVD as you would be running longer so if you have 2 2200 packs in parallel then you would be 4400 so if you ran 20mins before you will run 40-45mins give or take a few mins. it helps load on the lipos like that in parallel a little but its always good to have lipos that supply more amps than what your esc/motor needs to be feeding on.

[50togo]

With overheating problems on a single battery stay away from running parallel.
On a stock system most 25c or 30c batteries will supply enough amps.
with your 28/50 gearing your running hot I would drop down in gearing to the 23 pinion you have and test it again
Same driving style as before

[minirevobasher]

With overheating problems on a single battery stay away from running parallel.
On a stock system most 25c or 30c batteries will supply enough amps.
with your 28/50 gearing your running hot I would drop down in gearing to the 23 pinion you have and test it again
Same driving style as before

How much is the 23t pinion going to give away speed?
I am going to go see if i can find any spare pinions laying in the garage........

[50togo]

dropping down to 23's will drop about 6mph.
time for a mmp esc !

[mike-susieq1]

it wont drop too much. you'll mostly see more of the decrease in bottom end take off and pick up of top end. i went back to 28/50 and liked it but then found out my diffs are clicking so went back down to 23/50 for now till i shim my diffs. i need to do that before vacation time first of aug. my temps were ok running stock and speed pinion. but thats my system every system is different thats for sure.

[minirevobasher]

Alright. I don't have any spare pinions, so i will order a 23 tooth