Let me start this thread by saying that this IS NOT a HV is better thread. The intention of this thread is purely informational to anyone that might be interested in high voltage systems for 1/10 cars.

I'm always curious to play with the electrical systems in these cars and am overly obsessive with efficiency. With that in mind, I've been trying to get a good 6S setup for my truck for a long time (this being my 3rd attempt). After having most of them struggling in one aspect or another, I finally gave up and went with a Novak Pulse and Trinity 4XS 3800 with several brands of shorty batteries. This combination is the best 2S power system I've ever driven in a 1/10 car/truck (my opinion only), and gave the truck fantastic handling characteristics.

Recently Team Tekin released their ROC 412 motor line offering a 1200kv option. That motor on 6S could be a good power combination with my Castle MMP 1-cell and potentially give the Novak-Trinity system a run for it's money. After calling Tekin's tech support to see what they thought about running their ROC 1200 on 6S, and having them tell me that it was not a great idea, I went ahead and ordered one.

Today I ran both systems back to back with an EagleTree datalogger. They drove almost identically on the track, with one difference being the feel of the ESC, and the second being the weight distribution because I didn't have the equivalent of a shorty pack in 6S. It was more like the length of a regular stick pack but the weight of a shorty.

The 2 main differences that affect my decision on which system to continue to run are as follows:

1. The 6S system ran VERY cool. In the summer the Novak will get up to 150F with no fan and my prior experience with the MMP 1-cell on 6S is that it will approach 100F and that's it. Lower temps are better for ESCs and could mean a substantially longer life.

2. The runtime on 6S is marginally longer and the batteries are cheaper. I was running the equivalent of a 3900mah pack in the 6S system vs a 4200 in the 2S and got consistently longer runtimes. In addition the 6S batteries cost 25% less. I'm going to try some different setups to see if I can get the 6S battery placement and weight distribution similar to the shorty.

If I can get the battery placement to be similar to the shorty setup, I'll continue to run the 6S setup. If not, the 2S system I was running is fantastic. It's a really a toss up though as 6S is much more of a hassle compared to the 2S with everything being non-standard, ie. having to run 2 packs in series, etc...

I'm happy to post more graphs for anything I missed and/or answer questions about my setups to anyone that is interested.

The setups:
Both of the systems were run in a Team Associated T4.1 with the current mods (big bore shocks, avid rack, slipper and pistons, etc...). In addition, I run a separate 460mah lipo for my receiver that sits atop the servo (adds useful weight rather than adding lead), so the results posted show only what the motor is drawing from the system.

Ambient temp was 60F on an indoor clay track.

Electrics 2S:
ESC - Novak Pulse (no fan)
Motor - Trinity 4XS 3800
Batteries - Turnigy nano-tech A-SPEC 4200mah 2S 65~130C Hardcase Lipo Pack
Gearing - 18/81

Electrics 6S:
ESC - Castle Creations MMP 1-Cell (no fan)
Motor - Team Tekin ROC 412 1200
Batteries - 2ea. (in series) Turnigy nano-tech 1300mAh 3S 45~90C Lipo Pack
Gearing - 21-81



Pulse_Temps
TempA = Motor Temp and TempB = ESC Temp.
Note: The temp sensor moved from it's original position, so the results are not accurate. The actual motor temp was about the same as the Tekin per temp gun and Airtronics MT-4 telemetry.


Pulse_Volts


Pulse_Amps


Pulse_Watts


MMP_Temps
TempA = Motor Temp and TempB = ESC Temp.


MMP_Volts


MMP_Amps


MMP_Watts

Take a look at your current (amps). It's far less on 6s than 2s. Higher amps = higher heat = less efficiency.

I have a 5th scale I converted to brushless and I run a 14s setup to keep my current under 80A and everything else runs cool. I could run it off of 6s w/ a higher kv motor but then I'd be frying my esc.

Good data, thanks for posting.

That's IēR at work. (Ampsē)*Resistance = Watts Lost as Heat.

Good to see some real graphing data for people to look at.

There's no arguement, really, HV is better from a heat/longevity standpoint. It's just more complex.

Thanks for posting.

interesting graph

I'm not arguing that 2S is at all better. Just whether or not it's worth the hassle in this instance.

Here are a couple pics of the setup with the NEW 6s battery. It is WAY worth it now that I don't have to run multiple packs in series. The new pack is a Turnigy nano-tech 1300mAh 6S1P 35~70C Lipo Pack that costs only $24!