I'm the lucky owner of the car Joseph tuned, and I want to tell you that this guy has persistence like R. E. Lee. He dynoed the car for 3 hours, and when it later (while my wife and I were returning to Dobbins AFB/NAS to our room, I called him and we met at 10 p.m. for a 7 hour session that lasted until daylight!!!! There's a problem with something in the VEC3, we believe, as we changed the CPM, changed spark plugs, removed one of the valve covers to check it out, and Joseph tried every trick in the book, and some outside the book, but the partial throttle stumble kept changing rpms, though it was mostly around 2000-2250 rpms. ON the way home, after 180 miles of cruising at 70-75mph in 5th gear, the engine light came on; I guessed, and a code light confirmed, it was the 02 sensors. They both indicated "bank 1 and 2 were too lean", though black soot blew out when I ran it up to 5,000 rpms to clean it out. I've ordered new hitemp wires from Adam Brennan and a new VEC3 from my vendor. I should have them by Thursday, and will take the car to my Vipertech for installation and further checking on their high $$ machines to locate the problem (s). But the highest h.p. was 491.1 and the highest torque dynoed was 523.5. With new spark plugs and wires, it could go up from there. I'll have it checked out locally when the stumble problem is fixed. Thanks for everyone's inputs.
