[Barry_R]

Mike - the guy who wrote the article - is a really good guy. The 600HP target was never going to happen with that combination of parts. I have a lot of experience floggin' middle 400 inch pump gas stuff on the dyno.

I have to agree with the cam comments - hitting 600 at that displacement is nearly impossible with that small of a stick. Getting the engine to peak at around 6500 would help, but that requires durations over 240 @.050. Its also on the edge with non-trick hydraulic rollers, which tend to get squiggly after 6200 or so...

The carb size comments are right on - I've seen a 17HP gain going from a 750 to an 850 on a 547 horsepower 445 inche FE with no other changes. He was also being pretty safe/timid in tuning looking at the BSFC data. Was in the mid/hi 400s where a serious piece will often drop into the .380s. I'd love to see the O2 trace on that - maybe something was off in the flow meter data.

They also insisted on calling the PowerJection a Projection. I think the former is the Chinese one, while the latter would be a Holley item. Either wway they proved that TBI systems still suck.