Those that have the PCIII USB, have you tried the 04/05 map available from the PC website? It is richer than any other stock map, (up to 33% in one place). I'm running this map with the accelerator pump upgrade and the secondaries removed. The pump upgrade makes a difference only if you have the secondaries removed. It shoots extra fuel when the throttle is snapped open (programmable), and is really needed if you don't have the secondary throttle plates to limit the airflow while the engine is catching up. It all goes back to the large Holley carbs we use to run on our cars. When the throttle is snapped open quickly, the engine vacume is lost momentarily until the rpms get high enough to produce the required vacume. So to overcome this loss of vacume, and the resulting loss of fuel/air mixture, the accelerator pump was born. Now, you can have the best of both worlds, with the large throttle body/fuel injection, (thanks Suzuki), minus the secondaries, and an accelerator pump.
However, I doubt if you could tell any difference with the secondaries intact though.
Try it, you'll like it. And it's free for the USB model only.