esc running 8.4V,can it be done?

[DRRfanatic425]

I tell you ,the need for speed never stops. i just finished my drr with all the mods and upgrades that i ordered. to say the least, i am amazed! let me give you the run-down. i upgraded from a 180 motor to a team orion big block motor with a cap board installed(some cutting and drilling and believe me , there is no room to spare) i am now running a 40t spur and a 15t pinion. i had to go with teflon ball bearings all the way around(to keep things friction free.of course i'm running 7.2v (6 aaa, 800 maH, thats 4800maH i think) i had to have some BLING BLING aluminum rims all the way around (silver). you might not believe it ,but i'm getting between 40-47MPG!!!! i think it's great. but remember in the begining i told you that the need for speed never stops, i want to run 8.4V lith-ion batteries in this baby. can anyone tell me if the stock electronics can handle it. if not, what would you recommend i out fit her with? oh yeah i just finished the body that i was working on for her, it's a Porsche GT-1 EVO . i love it. oh, also i would like to run foams , could someone please tell me where to get foams that will fit the stock rims,but larger diameter. thanks , pics to follow.