OK chaps. Went with a MAF setup on my OBD2. Few hiccups, like my MAF extension loom being suspect causing a MAF fault code error to ground. And found out that the pulley on the charger is 6psi :@ . Brought it s/hand and got a 2nd spare pulley in a box. Was told at the time of purchase that the pulley already on the charger was an 8psi, and the one in the box was 6psi. :@ :@ . Hopefully the one in the box is the 8psi. Does anyone know the diameter of the 8psi pulley? Vince mapped it anyway with the redtops, 6psi puley, MAF, and water injection and acheived 270bhp, which at this time i'm mor