Originally Posted by quadsbaby

Just so you guys know, the speedbooster/sprintbooster thing is just an amplifier... i.e. Pressing the gas pedal in 2/3 of the way without speedbooster gives you 2/3 power, with speedbooster gives you full throttle. If you're pushing the pedal down at full speed, the difference between going 2/3 of the way and all the way is usually less than .1 seconds. The only reason people think their engines are more responsive is because they are getting throttle response before the pedal hits the floor. In other words, the "speed"booster doesn't really speed up anything at all.

If you really want something that essentially puts all of your throttle response in the first 2/3 of travel (increasing sensitivity, but decreasing "feel"), then by all means, go ahead. But understand that the circuitry required to do this (essentially a voltage multiplier on the signal the pedal sends to the ECU) costs maybe $20 at most.

<--- Electrical Engineer

Originally Posted by Jack370Z

When downshifting with the SyncRev Sport Pkg the RPM's will hold momentarily on an up shift and rev match on a down shift allowing for a smooth transition . I have found the "slight" throttle response delay isn't as apparent as you cycle thru the gears. I haven't tried the Booster thing but might run by for the free demo they offer on their website. It is about an hour drive but...it would be a good excuse to make a little road trip. The more I drive my Z the less it bothers me but there is a short learning curve if it has been a few days since I've had it on the road and driven my work car (the Saturn).