Robert:
This may help some -- from an 'engineering' guy ;o)
https://wahiduddin.net/calc/cf.htm
Edit:
here also:
https://www.dynomitedynamometer.com/...horsepower.htm
https://www.dynomitedynamometer.com/...-tech-talk.htm
http://www.superchevy.com/how-to/ght...el-horsepower/
The above articles are one of the reasons I wanted to use the SAE correction as a test...
You'll note the CF he shows are the formulas -- I'm using the latest one from SAE defined for the 2004 revision where he quotes the 1990 CF (JUN90) and AUG 2004 formulas for calculating CF... I cheated and found the actual value...
-Don