Quote:
Originally Posted by NightWriter
Quote:
Originally Posted by Limegrntaln
600 to the crank. Everywhere except the US, dynos in crank, even with the car on the dyno. I guess they like the higher number.
|
It's not a country thing. Manufacturers measure output at the engine flywheel (and then modify it for marketing purposes). Everyone else -- YouTubers, backyard wrenchers, and ECU tuners alike -- use chassis dynos that measure torque (and then derive HP) at the drive wheels, and then apply some formula for estimating the total power at the crankshaft. (Typically, accounting for a 10-15% drivetrain loss.)
Unless you see someone pulling an engine out and strapping it to an engine dyno ... then it's a chassis dyno. |
That should be how it is, but why is this advertised like the car is making almost 600hp when the motor is? I get it. But they show the car on a dyno, like people are thinking it makes 60 more hp than BMW says.