My Stage 3 Roush was ran on the dyno today. Two runs.
379.78 rwhp/ 353.88tq
376.81 rwhp/ 359.76tq
Not bad runs really. bhp is above Roush's 415hp and 385tq for sure. If you rate a 18% loss you get this...
377/ .82= 459 hp
360/ .82= 439 tq
This is how I was told to run the numbers. Doesn't seem quite right, but sounds good.
Check out my website for a video of the runs, and a photo of the dyno sheet. I have photos of the car on the dyno in the hunts for now... I will add them to the page later.