I tested my 540i with
the Dyno Jet.
My 540i average run is about 485 horsepower at the flywheel (388.0 Rear Wheel Horsepower @ the Rear Wheel on Dyno Jet +
20% Automatic Transmission Power Loss: 388 RWHP divided by 80% = 485 HP) and 421 lb/ft of torque @ the Crank (337 lb/ft @
the Rear Wheel on Dyno Jet + 20% Power Loss: 337 lb/ft divided by 80% = 421.25 lb/ft Torque). FYI my lowest RWHP run was 371 and my highest was 397 HP at the rear wheel in an average of 5 runs.
Here is my Dyno Graph
On this run, my cars shows 486.13 horsepower at the flywheel (388.9 Rear Wheel Horsepower @ the Rear Wheel on Dyno Jet +
20% Automatic Transmission Power Loss: 388.90 RWHP divided by 80% = 488.13 HP)
Here are pictures of my Dyno Day
For your information.
The accuracy, precision, and dependability of Dynojet's Automotive Chassis Dynamometer has been recognized by
the National Association for Stock Car Auto Racing as the benchmark in automotive dynamometer design.
Dynojet Research is proud to announce that it has linked a three-year deal with NASCAR to provide dynamometer
services for the organization's NASCAR Winston Cup Series, NASCAR Busch Grand National Series, and NASCAR Craftsman
Truck Series events. NASCAR uses Dynojet's dyno for race rule enforcement, and to determine power production of the
competing cars in race trim. The Dynojet Dynamometer is ideally suited for this role due to it's simplicity of operation,
reliability, and accuracy.
Dynojet has become the officially licensed NASCAR dynamometer.
This agreement is a reflection of NASCAR's recognition of the advanced technical
capabilities of the Dynojet Automotive Dynamometer. Several NASCAR teams have acquired
Dynojet Dynamometers for their own use.