I was reading a post and someone had mentioned that their fuel pressure was increased after the put a walbro 255lph pump in.
I never checked mine once it was in....has anyone else? If so what is your PSI now?

Thanks.

 

thats probably because their old pump was so dead it couldnt hold stock FP .. ur FP regulator wont let it go above a certain level .. unless u adjust it so

 

exactly!!!

 

Ahh I see....thanks.

 

FP is controlled by the FP regulator on the fuel rail.

It controls the FP by regulating the flow of fuel back to the gas tank so it holds enough fuel in the rails to generate 43.5 psi.

A bigger fuel pump won't change that unless the stocker was kaput.

 

Sorry to confuse thing even further....But

i did notice changes in my FP..(Although, I am not the guy he spoke about)

This was with the stock FP Regulator
First, I had the stock pump which Idled at 35
Then I added an inline pump and it idled at 36-37psi
Then thru in a Walboro along with the Inline an it idled at 38 to 39 psi

Now this is with and Adjustable aftermarket FPR
Walboro intank with inline idled at 38-39 psi
Walboro with OUT inline idled 36-37 psi
Walboro with racetronic hard wiring kit to the Alternator idled 37-38psi

So I have personally seen the pressure go up with more voltage and or the bigger pump(s).

Also, I talked with Jack at racetronics about this and he said it was normal.
I have also seen a post (on Force Induction a few months ago) about someone who added the dual intank walboro and his FP would no go below 63PSI (no matter what he did to his Adjustable Fuel pressure Regulator). Jack then explained that the Dual intank pumps will do that cuz they pump out SOO much more fuel than the stocker.

All of my Test were done with a 2 5/8 electric Fuel Pressure guage I have mounted in the vents of my TA.

Hope that helps,

 

See I knew I wasnt crazy.

 

Nope your not crazy...

But mabee I am Crazy for looking at my guages so closely and monitoring everything all the time