Pro Flo 4 with Delphi FE0114 or ACDelco EP381

[TommyGuns]

I'm running a Vortec 350 with a decent cam, about 360hp. I have 30lb/hr injectors at 43psi, running a Walbro pump (255 l/hr which is 67gal/hr). Not a Pro Flow 4 but a similar style setup. For me it is plenty, for you it is definitely adequate.

I'm definitely looking at Walbro, Aeromotive as well. I was leaning toward Delphi and AC Delco due to their history with GM, but my number one concern is reliability and drivability.

I did look around where I live and a Dyno / ECU tune is less expensive than I thought. I may end up making an appointment regardless.

 

[Frankenchevy]

Perhaps I'm confused. The injectors I have are 29 lb/hr, 58 PSI injectors. If I want to run 29 lb/hr at 43 PSI, wouldn't I need to change to injectors rated for 29 lb/hr at 43 PSI?

I'll give the tech line a call for sure once they open again.

No, that’s what I was getting at. Same 29lbs/hr injectors different fuel pressure regulator. The injector’s rating is separate from the fuel pressure regulator’s rating. In other words, you keep your 29lbs/hr injectors, but limit fuel pressure to 43psi and run the appropriate tune I highlighted in the screenshot above.

 

[Ricko1966]

I'm definitely looking at Walbro, Aeromotive as well. I was leaning toward Delphi and AC Delco due to their history with GM, but my number one concern is reliability and drivability.

I did look around where I live and a Dyno / ECU tune is less expensive than I thought. I may end up making an appointment regardless.

Just using the name delphi/Delco is no longer a qaurantee of a better part Delco now has 3 lines consumer grade,mid grade and dealer grade. Their cheap stuff is just the same offshore crap everyone else sells.The mid grade is meh. Dealer grade is supposed to be O.E. spec with life expectancy of 100,000 miles.