Is 1515 too much for my buggy/batteries?

[yuri]

That is, I have the chance to buy a used 1515 2.5D/F for my 808 and I don´t know if it will be too much for the buggy...

Though I think I could handle that extra torque with the castle link, don´t know if its weight would be too much for my setup, already have a 6s pack dropped in and I´m racing with it...

And the other question is that being a 100Amp motor I´m seriously concerned about my batts (6s 4000 zippy-H) and though they seem to be ok with my current motor (medusa) don´t know what would happen if I use them with the neu (maybe puffing in a few runs?).