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2200mah 3s on a heavier rig...thoughts?

J

jtessmer88

Pebble Pounder
Joined
May 23, 2014
Messages
101
Location
Hartville
Both my Wroncho and my SCX10 are 8lb beasts with full armour, both running holmes 35t motors 14t pinion and BRXL ESC's I ordered some 5000mah 3s the other night and when they showed up I vastly underestimated their size.

Now im looking to buy 4 or 5 smaller packs. LHS has turnigys (yes I know) for 18 bucks a piece in 2200mah 3s.

Just wondering if I should even bother with these and get 3 or 4 of them, or if im really looking at like 20 minute run times which would make them pointless.

I can always run these beastly packs, but Im not really looking forward to addind a pound to each rig.
 
I run two 3s 2200mah LiPo's in a saddle pak design (mounted on the sliders)
I've configured the wiring of those to discharge combined (parallel)
so I have a total of 4400 mah combined.

55T mtr 87/14

I'm also able to fit a full Dinky interior and still fit these.

I don't think weight is an issue
and I actually prefer my chassis on the heavier side.
But then I roll slow, nearer to actual crawl speeds.
But occasionally I will spin up the tires for additional traction.

I don't compete in any Class per say.

If I were going to run a single 2200mah
I'd likely run it cross width mounted (spanning the frame rails)
located just forward of the transmission location.

With my home brew custom bumpers, sliders, winch, batteries,
beef tubes, wheel weights, misc, etc.
I'm fairly sure I'm nearing 9lbs...
I haven't weighed it... so it could be more then I guess.

My COG is low tho'... so it does purdy good on angle (side hill).
I like the weight, in that it replicates a more realistic behavior
and the suspension is tuned specifically to it's weight.

Mind you... I don't hammer down, bash or jump obstacles.

I feel the 2200mah 3s LiPo's are a great choice
because the dimension and capacity of those...
works very well for my wants.

Mine have a 30C discharge rate...
and they only cost $ 15.00 for each/new.
^ best bang for the buck... IMO
 
I also use the 2200mah turnigy packs. Early on in my newbness I got the 20c rating though. That's fine for some, but I ran them a little harder than I should've so they have a slight puff now.
Point : get the higher C rating. I go for 60c now give or take.
I run multiple rigs with the same batteries, so amp draw varies.
 
robertjpjr said:
I also use the 2200mah turnigy packs. Early on in my newbness I got the 20c rating though. That's fine for some, but I ran them a little harder than I should've so they have a slight puff now.
Point : get the higher C rating. I go for 60c now give or take.
I run multiple rigs with the same batteries, so amp draw varies.
Click to expand...
Possibly your charge amperage rate is set too high ?
or geared too tall ?
Possibly you run a high amperage demand motor ?

I have never had issue with my LiPo's swelling (puffing).

I charge mine at 2.1A
balanced during each charge.

I even have and use 25C with no issues.
I tried a 60C... and really couldn't tell the difference.

granted... I don't have a ballistic amp draw.
nor do I find that appealing.

It's a crawler...
I'd choose a different chassis if I wanted to haul butt.

a 60C will cost a whole lot more dollar
and may not be necessary for most average users.
 
Last edited:
TacoCrawler said:
Possibly your charge amperage rate is set too high ?
or geared too tall ?
Possibly you run a high amperage demand motor ?

I have never had issue with my LiPo's swelling (puffing).

I charge mine at 2.1A
balanced during each charge.

I even have and use 25C with no issues.
I tried a 60C... and really couldn't tell the difference.

granted... I don't have a ballistic amp draw.
nor do I find that appealing.

It's a crawler...
I'd choose a different chassis if I wanted to haul butt.

a 60C will cost a whole lot more dollar
and may not be necessary for most average users.
Click to expand...

A 3s 2000mah with 20c battery only has an amp rating of 44amps.
I Run a BRXL with HH 27t sport motor. 56/13
That combo swelled my batteries.
The motor doesn't have amp draw specs that I've seen. Regardless, they swelled. Only charged on 1c even though they are rated higher.

That being said, its whatever. I was just recommending that batteries aren't one thing to skimp on. IN C Rating. I will never pay $100+ for a battery, unless there are specs to match.

The 60c constant 135c peak batteries are only $45 or so.
Well worth it to me, since I use them for higher amp draw motors, like 4000kv brushless.
 
robertjpjr said:
A 3s 2000mah with 20c battery only has an amp rating of 44amps.
I Run a BRXL with HH 27t sport motor. 56/13
That combo swelled my batteries.
The motor doesn't have amp draw specs that I've seen. Regardless, they swelled. Only charged on 1c even though they are rated higher.

That being said, its whatever. I was just recommending that batteries aren't one thing to skimp on. IN C Rating. I will never pay $100+ for a battery, unless there are specs to match.

The 60c constant 135c peak batteries are only $45 or so.
Well worth it to me, since I use them for higher amp draw motors, like 4000kv brushless.
Click to expand...
4.31 ?

I gear mine 87/14 which is 6.21

I also roll 4.19" 1.9 tires/wheels

maybe only 4 - 5 mph max

But my 55T mtr is smooth and has plenty of torque
at the low end/off the line.

I'll bet that 27T has a higher amp demand/draw as well
lower wind motors usually do.
Even more so... since yer geared tall... (LIMO)
 
Last edited:
jtessmer88 said:
Well shoot...I just picked up 2200mah 20c from a local who orders in bulk. Hoping my 35t doesn't swell them
Click to expand...

The 20c should be fine assuming 14t means your running 87/14 with your 35t. You will just have slightly less punch with the 20c opposed to a higher rated "C" batteries. I personally like to have wheel speed along with low end power. Too much amp draw is usually the culprit when lipos puff.
 
Yes I am geared 87/14....I'm actually debating going to 87/13 just because I've
Lost a few motors to heat already. 87/18 and 2s got pretty hot on long trail days and cooked motors on the rocks
 
I run little 3s 800mah lipos in all three of my scale comp rigs. The gens ace 20c have never let me down yet. Can usually get 20-25 crawl time and they never get hot, even in my class 3 with rear steer and a 25t Brood axle buster. In my TTC rig I run a 1000mah 4s gens ace with a 3300 pro4 and it never dumps or puffs lipos. All of these rigs have really tall gearing which certainly does help.

Unless you are on a track or constantly doing mud bogs, FOFF or tractor pulls you can get away with having a much smaller battery with low c depending on your kv and gearing of course.

At scale nationals I witnessed a buddy have a lipo dump in the tractor pull. Sad thing was it was my lipo......max amps:roll:
 
jtessmer88 said:
Yes I am geared 87/14....I'm actually debating going to 87/13 just because I've
Lost a few motors to heat already. 87/18 and 2s got pretty hot on long trail days and cooked motors on the rocks
Click to expand...

You're better off going with the largest spur that will fit, then play with pinion sizes to see what your motor is happy with. A large spur will take a lot of load off of the motor. I've been running a 90T spur and 14T pinion on a 35T motor on a pair of 4s lipo's. Crawls dead slow and has plenty of wheel speed. After two hours of hard trailing, motor is warm.
 
Like Sam said - give them a try.
Your 8lbs is not heavy at all, my old ratrod was more around 15lbs and I ran an old Puller motor with axial esc on 800mah lipos. That was asking for issues, but it always crawled like a crazy rock monkey.
 
TacoCrawler said:
I gear mine 87/14 which is 6.21

I also roll 4.19" 1.9 tires/wheels

maybe only 4 - 5 mph max

But my 55T mtr is smooth and has plenty of torque
at the low end/off the line.

I'll bet that 27T has a higher amp demand/draw as well
lower wind motors usually do.
Even more so... since yer geared tall... (LIMO)
Click to expand...

I'm at 20/87 948 pitch) with 45T lathe motor and now 13/56 (32 pitch) with Traxxas 21T Titan.

Axial 1.9 Ripsaws = 4.3" tall...works great...however a couple of my 20C lipos have puffed, I'll be going higher C rating next order.
 
Natedog said:
I'm at 20/87 948 pitch) with 45T lathe motor and now 13/56 (32 pitch) with Traxxas 21T Titan.

Axial 1.9 Ripsaws = 4.3" tall...works great...however a couple of my 20C lipos have puffed, I'll be going higher C rating next order.
Click to expand...
87/20 is stock out the box.

I'd personally gear that lower.
too tall of gearing puts more load on the motor
and it's demand from the battery.
Even more so if put in a bind and not backing off.

heat/resistance is an enemy
and any bind or resistance will make the motor work harder
and likely draw more amperage.

A harder working motor (taller gears) or one that is put into a bind...
will stress the battery more.

Amp draw will increase when the motor is binding
and that added demand from the battery is likely not good for it.
 
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