The air/fuel function of the dyno wasn't used or connected for the dyno session.

 

I am not a mechanic orwrench, but I have had two 928s. My former mechanic who operates out of Ventura California installed a vortech in to a 1984 4.7L 928, and I had the opportunity to drive it. At the time, I had a N/A 1982 4.5L with only a RMB. I can only say that driving his car was a real thrill, and it took off from a standing start (remember it was a automatic tranny) like a bat out of hell, burning rubber for almost a quarter of a mile. Damn, talk about fun