Stan,
Thanx for the question.
In the example I used here, I just used a BSFC of 0.5lb/hp-hr which is a pretty good target for planning. However, it is quite common for BSFCs to be somewhere around 0.45 to 0.47 when everything is complimentary. Stockers have to use OEM manifolds and SS stuff uses other than OEM so they can get a bit more fuel efficient as happens when CR go up as well. I did not get into an analysis of efficiency, simply wanted to point out the fallacy of following the wrong guidelines on how the goofy QJ works in practice. These things are more fun than a box of puppies when tweaking them on the dynamometer.
Regards,
HB2
Dissident