Is there a sheet showing the uncorrected HP from the run that has the motor running off the dyno fuel system ?
How about a sheet showing barometric pressure and air temp?

Based on what the calculated uncorrected HP should be(going by the fuel flow and BSFC numbers) the correction factor changes over 10% from the beginning of the pull to the end(12.7% CF at 4000/23.4% CF at 7000).
The correction factor is primarily used to correct for weather conditions..
A 10%+ variance is pretty big overall....... so the question is....... how can the weather inside the dyno room change that much in about 5-10 seconds?

If you look at the sheet from gregsdart the CF is within about 1% throughout the pull.

Superflow channel description and formula for BSFC: