brushless or li-po - RC-Monster Forums

jimbob · 06.13.2007, 12:48 PM

i managed to find one :018: was going for the tekin 420 but couldn't find it
gunna be running one or two 820 motors :024: i wanna run 700 motors, but my motor plate is made for 820 motors... as i think 700 motor would be better but we will see

ya those IB's just weren't as good as everyone raved about, amp draw wasn't there i felt

lydiasdad · 07:55 PM

I used to run a dewalt 820 on 18 cells through a tekin 420. It was a very powerful setup, that motor can draw some serious amps. I would go li-po first for sure. I switched to a 9xl on the same 18 cells and the power was basically the same. Your setup is only as good as your batteries.

Edit: Don't bother with other big brushed motors, 700's, 970's etc. The dewalt 820 is by far the best.

jimbob · 06.14.2007, 06:10 AM

ok cheers :027: i will stick with them.. do you reckon one or two of these beasts is best + ther only $35 :004:

i will go lipo as they do draw alot, i think watts is around 500 ish so on 22V that is ~22 amps
but i know when i put one 7.2V pack on just to test it out.. it started smoking just sitting ther not yet moving when i pushed the throttle :007: i dont think the pack can deliever nearly 70A

Lipos it is then :027: now to find a decent charger etc

lydiasdad · 06.14.2007, 11:13 AM

I would only use one. Lighter weight plus less amp draw on the batteries. Right now I am running a single 820 motor in my jugg 2 on 6s A123 cells and it is a monster.

jimbob · 06.14.2007, 11:18 AM

sounds good. plus more room to mount everything :004:

how are the A123 cells actually i was looking at them before i saw the lipo packs, are they better or worse ???

lydiasdad · 06.14.2007, 11:30 AM

A123's have their pro's and con's when compared to li-po packs. The biggest pro is durability. They can be charged at up to 10 amps and you don't need a lvc to protect from over discharge. Their capacity is only 2300mah per cell though. Good li-po cells can put out more power with less weight. A123 cells can be more diffuclt to mount also although that varys from vehicle to vehicle. I went from gp 3300's to these A123 cells and I am very happy with them.

jimbob · 06.14.2007, 11:42 AM

sounds interesting, but ya i saw they only make 2300 cells, but you can paralell them right?
i might look into them also, i saw somewhere that they have 60A bursts ?? but if your running them with a 820 motor and ther not getting hot then it sounds good
what kinda charger do you need as they are 3.3V a cell aren;t they :eek: