I found this tool useful to extract values from the dyno plots:
http://arohatgi.info/WebPlotDigitizer/
It's not hard to configure it... I used it, but my F40 has a little more torque because the turbos...
Is there any formula to know what extra torque gives the turbo?
The dyno plots of real cars, if done right, would provide only the wheel horsepower, which will be much lower than the claimed estimated HP at the flywheel. The dyno chart would provide an idea of how to shape the torque curve, but all torque would be increased to meet the claimed estimated flywheel HP/Torque. In the CDFbin, drivetrain losses would be accounted for by setting all of the friction variables properly...something SMS fails to do BTW.
Let's say we have a boosted car with claim of 400hp @ 7000 rpm and 550nm @ 4500 rpm. We find that the turbos provide 10psi of boost.
1psi of boost provides approximately +5.319149 percent increase to both HP and to torque. The twin turbo seems to yield just a touch more boost over the single turbo.
10psi of boost = approximately 53.19149 percent of boost to HP and to torque.
In edfbin, the WasteGateRange is set in Pascal. The base value is always 100,000.00, which is standard atmospheric pressure.
10psi of boost = 68947.5728 Pascal
So, in edfbin, we would set the 1st value for WasteGateRange to 168947.5728 Pascal (100,000.00 base + 68947.5728 boost)
The engine would be designed with a "detune", because the turbo simulation will add ~53% boost. The engine torque curve would be designed for 261.2hp @ 7000 RPM and 359.1nm @ 4500 rpm in this example.
The final tweak is to the size of the air restrictor (AirRestrictorRange) in EDFbin to yield the correct peak HP. This is done for any type of engine.
