I run a dual pump setup in Z-Lab on the heads. I also run an electronically (pressure & TPS) controlled Accusump. Still lots of unknowns with the results since I just started using the setup. I've done some track time with it, but haven't driven on the track that I know has caused problems for other Z32 drivers (TWS in TX) to really do data comparison.
Eventually I'll update the Z-Lab blog with these things... never enough time for documentation. :-)
Later
When was the last time you *really* did something with your Z to call yourself a Z enthusiast?