Are Zippy Lipos safe with a Castle MMM Speedy?

[lincpimp]

Back to the OP, the zippy packs you mention will do fine IF YOU GEAR IT BACK DOWN SO IT DOES AROUND 45MPH ON 6S

PLEASE RE-READ WHAT I JUST TYPED, SAY IT ALOUD A FEW TIMES TILL IT SINKS IN. WITH STOCK GEARING THOSE ZIPPYS WILL GET HOT AND PUFF!

A 5000 20c lipo should be able to output around 100amps. That would not be enough for an 1/8 MT geared for 45mph on 4s, you need 150amps or more for 4s useage with that gearing. Now on 6s those cells should be fine.

Look at it this way, a 4s 5000 20c lipo can do 1480watts (theoretical max, no losses factored for this number) at 75% it can do 1110 watts, or 1.5hp, not enough for a 12lb truck with tall gearing.

A 6s 5000 20c lipo can do 2200watts, factor in about 75% effecientcy, and you have 1650 watts, or 2.2 hp. I would not run a MT on 6s with any cell spec'd lower than the 5000 20c you mention. Unless you plan to run 35mph, then you can run less capable cells (maybe even maxamps).

A 12lb truck doing 45mph uses some juice. A good rule of thumb, is 150amps for 4s 125 for 5s, and 100 for 6s. If you plan to squeeze out the 60+ mph claim on the flux, 2 polyquest 6000 25c 3s packs in series will be the best bet... 2500watts after losses, or 3.3hp...