Horsepower ratings
Thread Starter
Racer
Joined: Dec 2004
Posts: 487
Likes: 8
From: Carolina Beach NC
C7 of Year Finalist (performance mods) 2019
Horsepower ratings
I'm curious to know which horsepower rating manufacturers and industry magazines refer to when listing the horsepower of a vehicle. For instance, does my C7 really have 460 HP at the rear wheels or is it measured at the flywheel or elsewhere?
Melting Slicks
Joined: Jan 2010
Posts: 2,205
Likes: 67
From: Cumming GA
Flywheel is what magazines use on stock cars. When they talk about cars from Rousch, Callaway, Ligenfelter and so on, they often back into the flywheel number unless those companies run it on an engine dyno.
Most often magazines just print what the manufacturer gives them so nothing they get from testing.
Most often magazines just print what the manufacturer gives them so nothing they get from testing.
Former Vendor
Joined: May 2001
Posts: 6,125
Likes: 739
From: Callaway Cars - Old Lyme, Connecticut
http://media.chevrolet.com/media/us/...-corvette.html
Callaway has followed the same protocol in measuring power over the years, so we can compare to the base car, or the World's manufacturers who follow the same.
Now tuners will use an unscientific measurement, using rear wheel horsepower, supposed driveline loss, and extrapolate figures from there to come up with a figure. Some tuners have even rounded to the nearest marketing figure.
I hope this helps.
