Upgrading Fuel Pressure Regulator (Tutorial) Smart Car

Upgrading Fuel Regulator on Smart Roadster (452) 0.7 Turbo
Upgrading from 3.8 bar to 4.0 bar, does it make difference?
Bosch Fuel Regulator 4 bars Part No. 0280 160 575
The fuel pressure in a smart it restricted by a regulator to 3.8bar. By up-rating the fuel pressure into the fuel rail, you can increase the amount of fuel through the injectors for the same time frame. After a bit of research, we discovered that we could use a fuel pressure regulator from an Audi A6 which has a fuel pressure of 4bar with the same fitment as the smart.
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Видео Upgrading Fuel Pressure Regulator (Tutorial) Smart Car канала Smart Racer