MGM controller do I go for amperage or cell count??

[Finnster]

The A123s do peak @ 3.65 on the charger, but fall pretty quickly down to ~3.3v/cell until they dump. Even my 5S packs are about 17.8V (~3.5V/cell) after they come off the charger and rest for a bit. That why I said 7 cells should be just fine w/ the 18, but if you are thinking of leaving headroom for higher voltages later than the 16024 is the safe bet. You should be able to hit 40 tho on the 7S I would think, unless it really is that fat :)

[Purplefade]

Originally Posted by Finnster

The A123s do peak @ 3.65 on the charger, but fall pretty quickly down to ~3.3v/cell until they dump. Even my 5S packs are about 17.8V (~3.5V/cell) after they come off the charger and rest for a bit. That why I said 7 cells should be just fine w/ the 18, but if you are thinking of leaving headroom for higher voltages later than the 16024 is the safe bet. You should be able to hit 40 tho on the 7S I would think, unless it really is that fat :)

Ahh, I gotcha now, 7S = about 25.6v +/- = no real worries for the ESC after they settle, speaking of the 16018 that is. All in all I think I like your idea of going with the 16024 and having the headroom to grow. Can't say for sure, but I'm looking at the Neu 1515 2.5d or the 1515 1y, leaning towards the 1515 1y on 7s or 8s. All in all I'd say 15 pounds for the Savage is probably high, I'm hoping for\thinking I can get it down to, maybe 13.5 pounds or so.

I've got a Revo 3.3 that I was setting up also, but just haven't been able to get the packs how I'd like them balanced and I can't stand the fact that I can't easily access the shocks after I mount the ESC over them... Guess I could look for other solutions for the ESC, just seemed a plate over the rear shocks, close to the motor, was the most simple. The Revo is 8XL with Quark 125, running dual A123 6S1P packs for 19.8v at 4600mah :-) Love your Revo by the way!!