Are Zippy Lipos safe with a Castle MMM Speedy?

[fastbaja5b]

Originally Posted by JThiessen

Just my .02...you have been asking and re-asking this same question on multiple forums. I have read where you have recieved an answer, but you dont seem to want to hear it. I'm not trying to insult you, but it's apparent that if you want to operate within warrantable parameters, HPI's stance is you run 6S on 25T (and it appears that Castle is backing that same claim). Its either that, or run it how you want, and take your own warranty out (your wallet), which is how most of us have ran our stuff for many years.
I too have run mine with the 6S/20T, and I liked how it ran - but it was a bit on the uncontrollable side. I'd like to take some of the pep out of it - and the 25T may just do that (as opposed to 4S, which just seemed too tame for me). However, that is going to make it a PIA to run both 4S and 6S in one outing. So I need to rethink and make a commitment to one pack set up - which kinda sucks IMHO.

Got it, so what you are saying and what you are saying Castle is saying is to gear 6s by the manual which is a 25t pinion and forget ALL conventional wisdom on the matter.

...if you say so then thats what I will do........

I don't want to lose my warranty.

[Pdelcast]

Originally Posted by fastbaja5b

Got it, so what you are saying and what you are saying Castle is saying is to gear 6s by the manual which is a 25t pinion and forget ALL conventional wisdom on the matter.

...if you say so then thats what I will do........

I don't want to lose my warranty.

That's certainly not what I said.


I suggested you use the smallest pinion that gives you the performance you want and isn't too hard on the batteries/motor/ESC. You can test this by checking temps during your runs.

If you see temps above what is safe (120F or so), back down on the pinion.

Smaller pinion means less load on the motor, and cooler temps, and longer life.

[e-mike]

also the air flow in the body and the timing setting to lowest

[fastbaja5b]

I thought 4 pole motors preferred 10 degrees timing

[JThiessen]

Originally Posted by Pdelcast

That's certainly not what I said.


I suggested you use the smallest pinion that gives you the performance you want and isn't too hard on the batteries/motor/ESC. You can test this by checking temps during your runs.

If you see temps above what is safe (120F or so), back down on the pinion.

Smaller pinion means less load on the motor, and cooler temps, and longer life.

Yes - this is exactly what Castle can and should say. They can't contradict HPI on here, nor should they.

FWIW, I stubbornly wanted to try 6S/25T on the Flux tonight, and after 20 mintues, I decided it wasn't worth the hassel at this point. It earned my first failing grade for it with the work required to change the pinion. Its definitely NOT a quick change situation. So if you have one, better figure out what batteries you are going to run, gear appropriatly for that, and go have fun - dont bother with different sizes of batteries assuming you'll just quickly change the pinion. There's more on that in my Flux thread in the HPI section.

[fastbaja5b]

Ya know what, I give up hey, I just sold the Zippys on another forum and I'll stick to running the Flux as a 4s, it's more than fast enough for me in that form.

It seems ur not safe unless you have 8000mah 40C 3s Lipos and only maxcramps makes those claims!

[skellyo]

Originally Posted by fastbaja5b

It seems ur not safe unless you have 8000mah 40C 3s Lipos and only maxcramps makes those claims!

That's not really true. IMO, unless you go stupid high on the gearing and tire size, high quality 25C/50C 4000mAh cells are more than enough for running the Flux on 6S. The chances that you're going to be drawing 100A continuous is slim to none. 6S 25C 4000mAh packs ideally can output almost 3HP of power continuously. There's no way in hell you're going to be pulling that kind of power continuously.

[Sammus]

My bro runs a mmm 2200 on his savage XL conversion on 4000 6s zippy packs. it goes faster than you'd ever want to drive it and has an insane amount of power and nothing gets more than a few degC over ambient... so htfu and start running 6s :D

[fastbaja5b]

Another flux down, fried ESC

http://www.e-savage.com/forums/showt...ed=1#post37426

[skellyo]

Originally Posted by fastbaja5b

Another flux down, fried ESC

http://www.e-savage.com/forums/showt...ed=1#post37426

In regards to this comment of yours over there:
"Until then, I would question the Trucks ability to run 3s Lipos reliably at least until someone puts out a better guideline as to what packs we should and shouldn't run."

The truck is just fine on 2 X 3S lipos. IMO, just buy something other than Zippy's and don't gear it stupid high. Mine runs just fine on 2 X 3S Neu 25C 4900's, Badlands and 20:44 gearing.

[fastbaja5b]

Yeah mine has been fine on 2 * 2s lipos (2 * 5000mah 30C Harris rc hardcased)

Seems most of these issues are with Maxamps or Zippy lipos?

[pasan]

That thread you posted does not indicate in any clear manner that the Zippys were responsible for the failure, especially since the other truck is apparently still running fine. I love it when speculation becomes fact.

[Unsullied_Spy]

My Zippy-H 5000 mAH 20-30C pack held up fine with a MGM 16018 and a Neu 1515 1.5D, there's nothing wrong with their cells as long as you don't get stupid with them.

[pasan]

Originally Posted by Unsullied_Spy

My Zippy-H 5000 mAH 20-30C pack held up fine with a MGM 16018 and a Neu 1515 1.5D, there's nothing wrong with their cells as long as you don't get stupid with them.

I too use a pair of those 3S packs in my E-Revo. Till recently I had punch at 0%, but eased off because drive shafts have started creaking. Waiting till they go completely bust to get a set of the new BLE/Summit CVAs.

[truggyracer1]

ok, the question i got is how can we purchase the MMM's and them reliable enough to run lesser packs? i cant afford some of the prices for "higher end" lipos so i guess i try it and cross my fingers?