Tom, I have the sprint booster from day 2.

Please floor the car and see the delay of the engine. My big hemi has a throttle body also and it revs much faster.

Look at your data logger and see the SLOPE of the throttle position sensor, it Ramps up, it is slow to open and when your on and off the throttle many many times this adds up to real delay.

I even stored the boost in tanks of my turbo car to cut down on the spool up lag for corners on my daytona with the super 60 turbo / 300 hp on a 2.2
liter 4 banger.

I have been tinkering for years,often successfully aka super cooler, pulley saver, dual cai, and soon I hope the self tuner for the crossfire, as soon as the racing season lets me be.