John Rucker, same guy who told me the Aeromotive Stealth 340 is a rebadged Walbro 255...
Anyways, have you tweaked your AE tables? I'm honestly just learning this stuff, but I thought that's exactly what they are for?
AE Tuning Basics - What is acceleration enrichment?
The standard AE under the Acceleration Wizard can be thought of like the accelerator pump on a carb, which shoots in some extra fuel when you suddenly hit the throttle to compensate for the massive influx of air when you open the throttle blades. The goal is to compensate for this influx of air for an instant during that transient until the the transient is over and the VE tables are again providing the proper amount of fueling.