mmm sprint booster. In the mean time, you could try being a little more aggressive on the throttle. All a sprint booster does is modify the output of the pedal so that you reach full throttle sooner - so really all it is doing is tricking the computer into thinking that you're pressing the pedal further than you really are. I don't seem to notice and significant throttle lag in my car anymore after becoming a little more comfortably aggressive with it - maybe I'm just used to the car.