Sydneykid, I'll get the plot of power vs AFR's for you tommorow and then post it up, to see if that helps your calculations. The injectors are definately standard, as there the right colour, and if they were 550cc's then I'm sure the stock computer I had in there when I bought it would not have like it at all:D
As far as the dyno reading high: It was in shootout mode, so all the figures are there, all adjustable settings have been removed so no fudge factors can be entered. All cars dynoed on SST's read lower than most other dyno's in Perth, and Dyno Dynamics brought there car and tested it was accurate.
There are a number of other cars making around 350rwhp on stock injectors. Rob77 made 344rwhp (70% duty cycle) with stock injectors and no malpassi fuel reg., so I suggest that somewhere along the line the estimation that the stock injectors only flow 370cc might be wrong:D
Hicks, That's the majority of mods:D
Joel, Go the 910, nice and quite and flows heaps. I have my external, with the standard pump feeding the surge tank.