Fuel Pressure Issue

[JETURBO]

Trana is correct

But !!! Dont go removing the restriction/ Venturi or drilling a hole through it but some very smart people on here throughout the years know that if u "modify" the Venturi in tiny increments and watch what each enlarging does vs return pressure u can have your cake and eat it to in regards to correct rail pressure AND correct swirl pot recovery time/flow

Think about what ford done and do not fully disregard it, make it to suit the application at hand or smart up and run a higher rail pressure to suit the tune

[turbotrana]

I put in a Walbro 460 and took out the one way valve and drilled out the venturi to 4.5mm. I set the pump up in a bucket of Turps, a pressure line that goes back to the return with a pressure gauge and a 12 volt battery.

To my surprise the pot filled up great and the pressure was at 20psi (I wanted a low pressure cause I run 40psi base pressure on the injectors).

The venturi really only needs to be taken out to 4mm with a Walbro 460 cause the inlet ID is 4mm and the one way valve is around 4mm. There is no point in taking it out any more.

I have run the tank into the lower part of the red zone with no issues yet.

I originally thought I am going to have to be carefull on the venturi but it seems with the walbro 460 taking it out to 4mm is no problem.

But I can imagine once you run two pumps, that 4mm on the inlet may cause a problem.

I would think that the brass fitting on the KPM pump allows a larger diameter in this area and was a better solution when you think about the hassle the OP is going thru.