Picture of where/how to prime the fuel pump?

Rotary Evolution · 03-30-2013, 07:26 PM

yes and also consider the pump should be tested at the peak pressure you intend to operate the car at and that requires a working pressure regulator as well as all the plumbing in place. you can leave the car running and run a hose from the return line into a bucket away from the car and fire hazards. run up your fuel pressure regulator to static psi(pressure the regulator pushes with the car off or vacuum line disconnected) plus your target boost pressure.

in short say your static pressure is 40psi at atmospheric pressure at the regulator port, your peak target boost level is 15psi, so you should test the volume of the pump at 55psi@13.5volts(or whatever voltage your car charges at with all electrical loads on while running AT the fuel pump connector).

this will tell you within reason what to expect from the pump, it will be slightly skewed because the engine is actually using a very small percent of the fuel(usually about 5% or less at idle). you can do it with the car off but the numbers will again be lower since the voltage will be less without the charging system active.

03-30-2013, 07:26 PM	#1
Rotary Evolution rotaryevolution.net Join Date: Feb 2011 Location: Las Vegas, NV Posts: 248 Rep Power: 15	yes and also consider the pump should be tested at the peak pressure you intend to operate the car at and that requires a working pressure regulator as well as all the plumbing in place. you can leave the car running and run a hose from the return line into a bucket away from the car and fire hazards. run up your fuel pressure regulator to static psi(pressure the regulator pushes with the car off or vacuum line disconnected) plus your target boost pressure. in short say your static pressure is 40psi at atmospheric pressure at the regulator port, your peak target boost level is 15psi, so you should test the volume of the pump at 55psi@13.5volts(or whatever voltage your car charges at with all electrical loads on while running AT the fuel pump connector). this will tell you within reason what to expect from the pump, it will be slightly skewed because the engine is actually using a very small percent of the fuel(usually about 5% or less at idle). you can do it with the car off but the numbers will again be lower since the voltage will be less without the charging system active. Last edited by Rotary Evolution; 03-30-2013 at 07:29 PM.