351m
351m
Posting Guru
Joined: Aug 2000
Posts: 2,416
Likes: 4
From: PacNW
The factory never rated anything at the wheels. Engine HP ratings have always been measured at the flywheel. Since 1972 they've published the SAE net HP ratings which measures the engine with a complete exhaust and all accessories including emissions equipment. Prior to 1972 they published the SAE gross HP ratings which were also measured at the flywheel but the engines were stripped down to bare minumum, no accessories, no emissions, minimal exhaust.
