But then I installed a replacement for PrepareEmul and a much newer video driver (both written by Thomas) and WOW! I have what feels like a full speed 030 Mac. Sure it won't play games as smooth as it would if you had a real Chunky mode (like with a RTG card or Grafitti) but it's actually usable!
I assume it's using MMU based refresh? Before I got an RTG card, I did try a demo of the Savage EVD that was PPC enabled. That thing really shifted pixels.