The dyno was done and showed a 3% increase in torque from the groove alone. Compression and other sttings that the groove allows were not made. Expect subsequent tests to show fuel use and more advantages.
It looks like you can drive as aggressively as you like and save fuel doing it.
From other responses and private individuals, around 30% fuel savings in stop/start driving.
Granted it is more involved than the turbonator, but the advantages might be greater as well.
Sorry to preach. As my nick indicates, I'm really into the idea and look forward to when I can get a head retail.
Cheers.
