Here's a shot of the valve that lets boost into the rocket. It's a high speed DC motor valve driven by the SQ6M ECU with closed loop position control.
Here's the Spec C at Ecutek's chassis dyno facility in Uxbridge, England. That's a pretty nice chassis dyno cell. Mervyn at Ecutek helped out by staying late nights at the dyno when needed.
Ben's point of view during tuning. From the looks of it, he's got a pretty useful run page setup in Pi Caltool, which is the SQ6's tuning software.
The peak power is down with the rocket system on, but that's because it's the third consecutive run in a row. What's more important is the shape of the third yellow and blue curve and the slope of the green curve compared to the first two sets.
Check out the turbo speed and manifold pressure at the lower revs with the ALS (anti lag system = rocket on) on versus off. Keep in mind that the goal isn't to make big time horsepower. The car is a demo car for the rocket so the goal was to keep all of the good attributes of a Spec C is place. After all, the Spec C is a highly developed, lightweight car designed by STi. It's already really damn good right out of the box.
Notice the massive increase in torque output at lower revs. Once again, the power was a bit lower with the rocket on since it was the third consecutive run in a row. Otherwise, the power graphs would have laid right over each other above 4800 rpm or so.