Hi MikeL. Yes the Groove works on multiport injection, this is over 90% of all vehicles the Groove has been done upon.The Forum is pretty unorganized to make it easy to sort through the info, that is how it evolved over the years.
You might try going to youtube, look for the Gadgetmanglobal channel. then, look for any video where Ron Hatton is at a whiteboard. He posted several videos giving detailed explanations of the theory of operation of the Groove. The main thing, is how the Groove captures some if the incoming air on each intake stroke, and then releases it when the piston passes 90 degrees crank angle on each intake stroke. This in turn increases the amplitude of the pressure curve the fuel is exposed to during the intake stroke. The lower pressure (vacuum) the fuel is exposed to increases vaporization of the fuel droplets, and this happens in a fraction of a second. There is much more to this which is explained in great detail in the Gadgetman Groove
Personal License Training Kit Manual.
So I hope this helps, MikeL. Call me if you want more info. Thanks, Tracy G. 775 544-7692
