In my $6E XDF, the injector size is specified as Single Fire FI Size at 40psig. Does the $32B XDF also expect injector size to be entered relative to 40 psi vs the 43 psi the injector is rated at?

If this is the case, does the injector size need to be converted from a flow rate at 43 psi to a flow rate at 40 psi as part of the data entry into this table. Based on the online calculators, the 30 lb/hr at 43 psi injectors would need to be entered as 28.78 lb/hr at 40 psi if the data needs to be entered relative to 40 psi.

 

I'm not sure why it states at 40 psi fuel pressure. I would enter the flow rate of what it actually is at whatever fuel pressure it is set to.

RBob.

 

Could be just mis commented in the XDF?

GM gives variables for fuel pressure like 9 to 13 for TBI, but 13psi for TBI is correct and all MPFI I have worked on were 43 -43.5 at idle. I forget what varible GM gives for them...

I would just enter injector size. Then data log..