Are Zippy Lipos safe with a Castle MMM Speedy? - RC-Monster Forums

MrMin · 03.02.2009, 03:38 PM

Guys. I understand castle's standpoint here. As far as I understand, the problem is that the zippies cannot handle the current coming back to the batts(they got to handle 540 joules!! in 1-2 seconds). They cannot hold the voltage below 30v(FET max voltage) especially when braking. You will need to give the poor little zippies a helping hand to dump the load/current somewhere. Why not fix the problem by helping out your poor little zippies and any other batts that cannot handle the load? See my "investigating the mmm thread." as I will be putting the info there.

fastbaja5b · 03.02.2009, 07:18 PM

Quote:

Originally Posted by MrMin

Guys. I understand castle's standpoint here. As far as I understand, the problem is that the zippies cannot handle the current coming back to the batts(they got to handle 540 joules!! in 1-2 seconds). They cannot hold the voltage below 30v(FET max voltage) especially when braking. You will need to give the poor little zippies a helping hand to dump the load/current somewhere. Why not fix the problem by helping out your poor little zippies and any other batts that cannot handle the load? See my "investigating the mmm thread." as I will be putting the info there.

What castle standpoint? I can't even get a reply to an email from Castle support!

Pdelcast · 03.02.2009, 11:46 PM

Quote:

Originally Posted by fastbaja5b

What castle standpoint? I can't even get a reply to an email from Castle support!

Dude,

What's your question? I've gone back through your posts, and I don't really see a question anywhere...

Patrick

lincpimp · 03.02.2009, 11:59 PM

Quote:

Originally Posted by Pdelcast

Dude,

What's your question? I've gone back through your posts, and I don't really see a question anywhere...

Patrick

Are zippy lipos good enough for a MMM... Kinda open-ended, huh?!

Basically will a lipo rated for 100amps at 6s be ok in the flux, geared with the 25t pinion?

My experience says no... Maybe for a run or two, but not with good results...

Pdelcast · 03.03.2009, 12:05 AM

Quote:

Originally Posted by lincpimp

Are zippy lipos good enough for a MMM... Kinda open-ended, huh?!

Basically will a lipo rated for 100amps at 6s be ok in the flux, geared with the 25t pinion?

My experience says no... Maybe for a run or two, but not with good results...

I already said in another post that as a rule, Castle Creations does not comment on the performance, usability, fitness of purpose, etc. for other brands.

Besides, I don't have any "Zippy" batteries to test with. I haven't tested "Zippy" batteries. So I don't have any idea whether "Zippy" batteries are fit for the purpose of setups on the MMM. I would also imagine it would matter (A LOT!) what kind of setup you ran (pinion, overall gear ratio, etc.) that you ran (as it is with ALL batteries...)

My suggestion -- run the smallest pinion that gives you the performance you are looking for. And don't try to push anything too hard. At the power levels the MMM runs at, bad things will happen very quickly...

Patrick

lincpimp · 03.03.2009, 12:16 AM

Quote:

Originally Posted by Pdelcast

I already said in another post that as a rule, Castle Creations does not comment on the performance, usability, fitness of purpose, etc. for other brands.

Besides, I don't have any "Zippy" batteries to test with. I haven't tested "Zippy" batteries. So I don't have any idea whether "Zippy" batteries are fit for the purpose of setups on the MMM. I would also imagine it would matter (A LOT!) what kind of setup you ran (pinion, overall gear ratio, etc.) that you ran (as it is with ALL batteries...)

My suggestion -- run the smallest pinion that gives you the performance you are looking for. And don't try to push anything too hard. At the power levels the MMM runs at, bad things will happen very quickly...

Patrick

Good advice...

Zippys are compareable to maxamps (performace, not price).

I would think that moving a 12+ lb truck at 60+ mph will require a larger mah 30c 6s lipo. I find my 4500mah fp 6s 30c lipo is being pushed hard in the lst (heavier than the flux), and it is geared for 45mph... Some of the new 40c thunderpower lipos look to be the best bet... I have a jet buddy (BVM) who has some of them and says that they are leaps and bounds better than the 30c fp lipos...

Pdelcast · 03.03.2009, 12:23 AM

Besides,

There's like multiple cell types that you can order with "Zippy" batteries (Korean, Chinese-1, Chinese-2) many different sizes, different discharge rates, etc.etc.etc.... So it would be impossible for me to make any kind of blanket statements.

I guess I'm not sure why people always try to save money in batteries -- they are the most important part of the system. Poor batteries mean poor performance, and good batteries mean good performance. So buy the best batteries you can afford, and skimp on the "bling" parts.

kvrc · 03.03.2009, 10:52 AM

[QUOTE=lincpimp;266433]Good advice...

Zippys are compareable to maxamps (performace, not price).

with all due respect i dont think that is an accurate statement. myself and many of my racing buddies have had maxamps packs and now zippy 4s 5000 h and r packs in our 1/8 scale racing buggys.
i can tell you that the zippy packs are much better at holding voltage under load and producing power. the guys i am speaking of have raced 1/8 buggys going on 3+ years in southeast michigan so we have a lot of time on them.
also many of these guys have the higher end enerland based packs as well and they say that those packs may stay in balance a little better if ran down close to dumping. but for twice as much money i guess they should.