Fuel regulator

[rootedx]

Im wondering have any of u guys installed a fuel regulator on ur rides? Any reponds u get out from it?

 

[wfhan]

mine on stock.. no adjustable fuel regulator.. :(

 

[Greytezza]

Im wondering have any of u guys installed a fuel regulator on ur rides? Any reponds u get out from it?

One question- Is yr car with a stock NA engine configuration?

If Yes is the answer, then installing a fuel regulator brings no additional benefit.
It is only for cars that are turbocharged or supercharged and a NA engine does not need one.

 

[ehdrian]

i dun feel any response on my turbo engine also..

 

[TRDtezza]

to my understanding , a fuel regulator is just a thing to regulate your fuel and preventing fuel surge , while a adjustable fuel regulator allows you to adjust the amount of fuel going to your injectors.The lesser the pressure on the dial , the more fuel you are letting in. all cars are equipped with fuel regulators anyway i think.. correct me if i'm wrong please , just my 2cents

 

[Greytezza]

I believe what he is asking about is to add an additional adjustable fuel regulator in so the fuel pressure can be adjusted.
He is not talking about the regulator that is in our fuel pump assembly.

Here is a comment that I copy from another forum...hope it makes sense...

"The function of the fuel pressure regulator is to maintain a constant pressure difference between the fuel rail and the intake manifold. So when you let off the throttle and the manifold pressure drops by 5 psi, your fuel rail pressure will also drop by 5 psi. The pressure difference must remain 43.5 psi, the base pressure.
The injector's fuel flow is a function of the injector's pintle cross-sectional area, and the fuel's exit velocity. The pintle area is based on the injector's design. and the exit velocity is a function of the pressure difference between the fuel rail and manifold.

the exit velocity can easily be derived from the bernoulli equation. Keeping a constant exit velocity gives a linear relationship between fuel flow and injector pulsewidth, which is what we want.

so to summarize, a fpr gives us a linear relationship between fuel flow and pulswidth. and no, you don't need a fpr for a mild NA tune"

 

[wfhan]

eddy,
the 43.5 psi in that u excerpted, is it specific for SXE10 beams ?
or is just a general example given?

 

[Greytezza]

the 43.5 psi in that u excerpted, is it specific for SXE10 beams ?
or is just a general example given?

No..it is not for our SXE10 BEAM engine...the guy did not mention what engine he was talking about..

 

[rootedx]

I believe what he is asking about is to add an additional adjustable fuel regulator in so the fuel pressure can be adjusted.
He is not talking about the regulator that is in our fuel pump assembly.

Here is a comment that I copy from another forum...hope it makes sense...

"The function of the fuel pressure regulator is to maintain a constant pressure difference between the fuel rail and the intake manifold. So when you let off the throttle and the manifold pressure drops by 5 psi, your fuel rail pressure will also drop by 5 psi. The pressure difference must remain 43.5 psi, the base pressure.
The injector's fuel flow is a function of the injector's pintle cross-sectional area, and the fuel's exit velocity. The pintle area is based on the injector's design. and the exit velocity is a function of the pressure difference between the fuel rail and manifold.

the exit velocity can easily be derived from the bernoulli equation. Keeping a constant exit velocity gives a linear relationship between fuel flow and injector pulsewidth, which is what we want.

so to summarize, a fpr gives us a linear relationship between fuel flow and pulswidth. and no, you don't need a fpr for a mild NA tune"

Thanks for info gretezza...