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.

 

[Hunter79764]

Injectors are rated at a flow for a given pressure. Unless you go crazy extreme, any reasonable injector can run any reasonable pressure. Lowering the pressure into your 29lb/hr injectors will reduce the flow, giving longer injector cycles and I could see where the computer would have an easier time dialing in at idle with a lower pressure feeding the injectors. At your power level, there's not much risk of too low of a pressure at WOT, so not much risk by reducing the pressure. If you do not have a regulator built in (and it doesn't look like you do), then you need to purchase a regulator wither way. Just make sure to get one that can do 43 psi and you're set.
Also, to clarify something, fuel pumps don't make a set pressure either. They make max pressure when deadheaded, and make max flow when uncapped fully. Essentially anything other than a TBI pump will be able to handle the flow you need at 43 or 58 psi. Get an adjustable regulator and you can likely play with fuel pressure if you are having problems at idle or at WOT (Lower pressure will probably work better at idle, higher pressure will make better spray patterns, your actual mileage may vary).

 

[SquareRoot]

is this for a fuel injection vehicle?

Pro flo is EFI. Real EFI. So yes.

 

[SquareRoot]

I have seen several posts here where people used the Delphi FE0114 or ACDelco EP381 fuel pumps with the Pro Flo 4 system for a SBC. According to the Pro Flo 4 instructions the EFI system requires a minimum flow rate of 57 GPH. However, the FE0114 is rated at 32 GPH, and the EP381 is rated at 41 GPH; at least so far as I can find via Google.

For anyone who has a fuel system setup like this, have you had any issue with it? Are there other common fuel pumps I should consider instead?

Background:
I have a Pro Flo 4 installed on my truck's SBC 350 with Vortec heads. The kit came with 58 psi injectors as the only option for Vortec heads. I'm currently using Edelbrock's EFI Fuel Sump but I want to finish the conversion and reclaim space under the hood. I have new 20 gal '87 style EFI tanks. I am buying 1987 fuel senders, and had planned to buy two of either one of these pumps until I found this issue with fuel flow.

I have the exact same setup. 350, PF4, dual 20 gal tanks, two Delphi FE0114 pumps. I initially used the remote sump but got tired of it's issues. The pumps work fine, plenty of flow. Not sure why Edelbrock is sending them with 58# injectors. The 43# are more than enough for a street 350.