How do you adjust a Holley 12 803?
The regulator comes from Holley with the regulator pressure preset (see table). However, for individual requirements, it may be readjusted. Loosening the regulator locknut and turning the adjustment screw clockwise increases the pressure. Decrease pressure by turning the adjustment screw counter-clockwise.
Are Holley fuel pumps any good?
The Holley HP and Dominator electric fuel pumps are indeed a quality high performance piece. Manufactured with a billet housing and incorporating the tried and true gerotor type pump design, these pumps are built for durability and really shine under race conditions.
How much fuel pressure can a carburetor take?
Carburetor Fuel Pressure by Manufacturer
| Carburetor Style | Recommended Fuel Pressure |
|---|---|
| Autolite | 4.5 – 6.5 psi |
| Holley | 5.5 – 7.5 psi |
| Edelbrock | 6.5 psi (max) |
| Demon | 5 – 6 psi (at idle) |
Where should I mount my fuel pressure regulator?
The optimum EFI regulator location is after the fuel rail(s) when possible. All pump flow, minus engine consumption, must always run to the regulator, wherever it is. Putting it after the fuel rail means all fuel must run through the fuel rail, and over the injector inlet, at all times.
Where are Holley fuel pumps made?
Holley Performance Products is an automotive performance company based in Bowling Green, Kentucky. When the company was based in Michigan it was a major producer of carburetors for many Detroit-built automobiles….Holley Performance Products.
| Type | Private company |
|---|---|
| Headquarters | Bowling Green, Kentucky , United States |
| Parent | Sentinel Partners [1] |
Does a carb need a return line?
Registered. Yes, depends on the setup….. most aftermarket regulators have a return port in them. If you run a return your pump will run cooler and run for longer.
Can you use an electric fuel pump with a carburetor?
Electric fuel pumps come in three basic types. As long as a fuel pump provides the Flow Rate your engine needs at the pressure your Fuel Injected or Carbureted system requires, it will work just fine.