I have a Cyber-Maxx and unless RcSolutions changed the design its not set up for two engines. I'm sure you could do it though. I think either Hardcore Racing or New Era make a chassis kit for duals.. Come to think of it there was a member selling a dual engine chassis here not too long ago... Ill see if I can find the thread.
I would not try the supercharger deal. I can't see that as being basher friendly. One roll over and I see you starting a thread on "what do I do now my Maxx?". Save yourself the grief