You can wax and rebuild and do all that jazz but no EM is going to play like a solid state unless it has bridge rectified bumper and flipper power. It just isn't. AC games will never play as fast as DC games no matter what you do. I have a Bally Surfers that is 50v rather than 25v so it plays faster but compared to a game like Firepower it's not close.
They play like they play because that's the era they come from. If you want fast play then stick with SS or DMD games or get later EM games that have DC power in them.