Rated engine power
How do manufacturers, presently, determine how to rate their engine's crankshaft horsepower? Is the cooling fan engaged and drawing air? Alternator charging? Power steering pump and A/C installed and ...
Forum Discussion
There is a lot more leniency in the SAE J1995 or J1349 test requirements than most think.
Attached is an old J1349 test standards. I have the current J1349 and J1995 standards, but cannot link them. However, not much has changed.
J1349 Test Standard
Pages 10-12 discusses what you are looking for.
J1349 requires most accessories while J1995 doesn't. However, that does not mean the manufacturers do not test with accessories on J1995. Some do when they know exactly what the engine is used for making them no different than J1349. They have to use J1995 because they are not building the complete vehicle.
Attached is an old J1349 test standards. I have the current J1349 and J1995 standards, but cannot link them. However, not much has changed.
J1349 Test Standard
Pages 10-12 discusses what you are looking for.
J1349 requires most accessories while J1995 doesn't. However, that does not mean the manufacturers do not test with accessories on J1995. Some do when they know exactly what the engine is used for making them no different than J1349. They have to use J1995 because they are not building the complete vehicle.
