Sct puts a lot of stress on 2s. They should be 3s imo. My 7200 would slightly puff and get warm after an 8minute main

I checked the esc setting it's set to cut off at 3.2v, do you think if i change to a better esc will do any help ? even the cut off is 3.2v when i recharge the lipo it still showing around 3.6v per cell..
I running it like 15-20+ min, cause im doing bash most time just run and stop and jump..

I see more and more guys running SMC packs at my local track, from TC to 4WD SC.

If your running a 5600 in a heavy for the class 4x SCT for 15 to 20 minutes, that's why you are seeing it puff. That's probably pulling every last bit of juice out of the pack.

Are you sure the cut off is 3.2v per cell? Or is it 3.2v total?
Check the cut off setting, can you go to 6v or whatever higher? If so, that's total voltage. There's no such thing as 6v per cell cutoff.

If that's the case, you are running the pack till it doesn't have any more to give and that's bad for your pack. Won't last long.
Also, when you put your pack on charge, the 3.6 per cell is misleading because the instant the charger pushes juice into the pack the voltage kicks up. If you were to check it with a volt meter before charging it will be less.

That puff is probably not a bad puff. The 7200's pack so much in the case that there's barely any room for the cells to expand. The same expansion of a 6500 as the 7200 may not be noticed since the cells are smaller and have more room to expand before they are pushing on the case.

And yeah, 4x SCT should be allowed to progress to 3s with low kv motors.

IMHO A 4x4 SCT should never run more than 8 minutes!!!Any more than that and you are eating batteries and motors!!!Cheers!!!

The conversion based sct's have very efficient drive lines though. In both my Mugen and Tekno sct I can't get my motor over 145°. That's with stupid timing. I usually run 20° esc timing and after about 12 to 13 minutes when my 6.9v lvc kicks in I'm at 135°. Actually, I get to 135° in about 4 or 5 minutes and it stays there.

If I ran a lower mah pack, I would have less time getting to the same lvc. It all depends on the car, electronics, ambient temps and so on.

But nothing wrong with play g it safe as you suggest.

when I had my scte 2.0, my motor temps were 145 with a HW 4000 4 pole. But the pack was still being strained heavily. 3s is more efficient and I am surprised roar has not moved away from 2s.

Yeah, 100% agree. Roar moves at glacier speed though so it may be 2018 by the time they figure out we can save money by running 3s

Just ran SMC packs all day today. All are good, except one 3S has really high internal resistance numbers compared to all my others.

Most are around 3 or 4 per cell. One shows 9.x, 10.x, 9.x which seams abnormal. It seems to run OK though.

The truck your running is very heavy and puts a big strain on the batteries that why they are getting a little warm. What kind of a banana plug are you using, is it solid or is it the caged kind? If its the caged kind I would lose them and go to a solid plug.
Also how long are your races, 5600 for the SCT410 is probably pushing the pack to its limit on runtime as well.

Can you explain what you mean here?

Hmm thank you for all the information.. guess i should change the plug to solid plug first and see how it go, if 5600 is not enought what lipo will you recommend.

Hey guys, I've been eyeing the SMC lipos and I want to get 2x 3s to run as 6s in my 8ight. I run a castle 1717 (xo-1 motor) and its geared 24/40 so I suspect that has something to do with my current zippy 5000mah 45c getting quite warm and squishy. I've been hearing good things about SMC and I can get the 6500mah 70c locally but I'm wondering if I'd be able to fit 2 of them in the 8ight to make 6s? Anyone done this before?

You should be able to run dual 3s as a 6s setup, you'll just need to make up a Y harness to take them back to 1 deans plug, the packs are 35mm thick so they would sit high and I know for a fact that you can buy them locally and there is 2 in stock!

http://www.coast2coastrc.com.au/race...mah-70c-deans/

Personally I'd preorder 4300mah as there 25mm thick and will sit lower, they will give you heaps of runtime as 6s but there not in stock, you can preorder them and they should be in by the start of next month.

Justin

Mid November according to Danny's fb post.