27/06/2008 09:35. When it came time to dyno the Pontiac, we hooked up with Toms River, New Jersey-based Tune Time Performance. Proprietor Matt Hauffe got it onto the AWD Mustang dyno, and we let 'er rip. On Tune Time's dyno, the G8 put down 263 horses and 275 lb-ft-Tune Time thought that reading was a touch low, but we'll go with it. The factory timing was right around 18-19 degrees, and the air/fuel meter was reading between 11.3 and 11.8 at WOT. // GM High-Tech Performance Magazine