I should also add here the averages from 3000-5500rpm :
Before After
270.9 hp 296 hp
324.4 ft/lbs 356.7 ft/lbs
.530 BSFC .472 BSFC
25.1 hp gain and 32.3 ft/lb gain average and using less air and less fuel to do it.
Also worth mentioning was the fact that it liked 38 total timing on the 91 octane fuel, I bet it would pick up a couple of points on regular 87 octane, which we ran out of time to do. It's very interesting to look at the fuel and air flow numbers from before and after. J.Rob