fse power boost valve

[172mgw]

ok what i want 2 know is, what r these 4?, and r they ant good?

 

[BenR]

As std you car has its pressure regulator in the fuel tank so you cant fit one.

Anyway, with cars that can fit it, thir std regulator provides a constant pressure to the fuel rail, the ECU knows the fuel pressure so it is able to calculate the amount of time (DUTY%) that the injector needs to be open to provide the require amount of fuel. THe regulator is also fixed to a vacuum line from the inlet manifold. As manifold vacuum increases it pulls on the diaphram inside the regulator, reducing pressure at overrun and idle, this reducing suck through on the injectors. And when your at WOT there is no vacuum on the diaphram so fuel pressure rises. Std ones are usually linear in their rate.

THe PBV is similar, except it has a larger diaphram, more responsive to vaccum. You can adj the baseline fuel pressure and it has a rising rate of about 1.7. Thus it leads to a higher rail pressure than with he std regulator. More pressure and the same duty means that the injecto will flow more fuel.

Its a crude method of increasing fueling, and well....it cna work sometimes.

Its particuarly good on turbo engines as its boost aware, and it can be make mapping a turbo far easier as you dont run out of fuel as fast.

 

[172mgw]

yayyyyy ben r 2 the rescue! cheers 4 that info m8!