LiPo - 4s2p or is 4s 10000mah suffice?
 

Looking at LiPos, had my eye originally on a 4s2p 8000mah pack, but saw that there are 10000mah packs, but are not parallel, just series cells, so just 4s in this case.

Specs on the 4s2p are higher -
20C Constant(160 amps)
30C Sustained(240 amps)
50C Burst(400 amps)

Specs on the 4s 10000mah pack -
15C Constant(150 amps)
20C Sustained(200 amps)
30C Burst(300 amps)

The 10000mah pack is heavier and a smidge bigger, but neither of those are a real hinderance to me. Price of the 4s2p is higher, but the outputs of both of them are probably more than enough for my needs.

MGT - Neu 1515 1/y, Monster Pro 125...... The Quark is capable of 300 amps for a burst, so is there really a need for me to have a 2p pack that can put out more than I can theoretically handle anyway? Plus more runtime with the 10000mah pack, 25% more......

If two packs have the voltage and current requirements you need, it basically comes down to what will physically fit in whatever you plan to put it in. The 10Ah packs are longer and wider, but not as tall since there are only 4 cells instead of 8 in the 4s2p pack. Depending on how you mount the pack, the reduced height may help keep COG lower. And since the 10Ah pack is longer and wider, it may help to spread the weight to help prevent a "heavy spot".

With that username you don't need to think twice.. :)

Serious though; i would take the 4S2P setup. more power..

But is it really more power if I am never even able to harness it? Like I mentioned, the limitations of the ESC will never pull that many amps, unless I get a sizzle sizzle effect afterwards........

right??

the 8K packs will be working less hard; this makes them more durable.

It's an added layer of protection. If you won't be running that 4s2p pack at it's limit you can get more cycles and better performance down the line.

I have an MGT conversion. In stock form it is a clumsy vehicle. With all of that room, you'd think that batteries wouldn't be that important, but I've found that getting them as low and as close to the center as possible makes a difference in the way that the truck handles the rough stuff. The truck is top heavy as it is, so I run the 4S2P 8Ah packs. Plenty of runtime.