[Camaro1973]

Originally Posted by JSH

SAE:
"SAE (Society of Automotive Engineers), USA. Power is corrected to reference conditions of 29.23 InHg (99 kPa) of dry air and 77 F (25°C). This SAE standard requires a correction for friction torque.

STD:
STD is Another power correction standard determined by the SAE. Power is corrected to reference conditions of 29.92 InHg (103.3 kPa) of dry air and 60 F (15.5°C). Because the reference conditions include higher pressure and cooler air than the SAE standard, these corrected power numbers will always be about 4 % higher than the SAE power numbers. Friction torque is handled in the same way as in the SAE standard."

The first problem with quoting SAE is that there are at least 3 different SAE testing procedures but Dynojet does not distinguish them. The new SAE J2723 is actually not a new set of correction factors, it is simply a new procedure for using the existing factors (J1349 and J1995) used by automotive manufacturers but likely not by performance shops.

This here "The first problem with quoting SAE is that there are at least 3 different SAE testing procedures but Dynojet does not distinguish them."


Is complete nonsense. What you posted above is exactly the conditions that are corrected when SAE/STD are used on a dyno.