Are Zippy Lipos safe with a Castle MMM Speedy?

[emaxxnitro]

Yeah if he used better packs he will go faster. But still I can't get my erevo over 60 without it wheelieing and I use better packs 30c 5000's and a neumotor. If he where to use some poly quest or neuenergy packs he could see 80 possibly 85 mph but it's impossible to explain all of this stuff to the trx msg b members with out them crying or giving birth