My point is that such marginal differences in density up to 17 psi (~350 cfm per turbo) should not have a significant impact on performance. Also, consider where on these curves most of the time is spent while driving, or even racing; it's interesting to note that up to and including the flow my engine demands at peak horsepower (~300 cfm per turbo at ~6000 RPM), 13Gs are marginally
more efficient than 15Gs!
