Are fuel pumps mechanical or electric?

Originally, fuel pumps were “mechanical” in nature – meaning they were operated and controlled by manual means (engine rotation and vacuum pressure). When cars became sportier and developed more horsepower, electric pumps were utilized, which could deliver a higher-pressure flow of fuel.

How do you know which fuel pump you need?

Fuel Pump Specs Defined

1. 500 X 0.5 = 250 lbs./hr. A gallon of fuel weighs 6 lbs. To get gph divide lbs./hr. by 6.
2. 250 lbs./hr. ÷ 6 = 41.67 gph. A liter of fuel weighs about 1.6 lbs. To get lph divide lbs./hr.
3. 250 lbs./hr. ÷ 1.6 = 156.25 lph. You need the minimum flow rate at your fuel system’s operating pressure.

Which is better mechanical fuel pump or electric fuel pump?

There are several advantages to having an electrical fuel pump over a mechanical fuel pump, which is why almost all modern cars are electrical. They are safer, more convenient and much more useful of getting fuel to your engine efficiently.

How much is a fuel pump for a Chevy Cavalier?

Chevrolet Cavalier Fuel Pump Replacement Cost Estimate. The average cost for a Chevrolet Cavalier fuel pump replacement is between $609 and $651. Labor costs are estimated between $159 and $200 while parts are priced at $450.

How much HP can a mechanical fuel pump support?

Although a good mechanical fuel pump can feed your engine for up to 400 horsepower, have an electric fuel pump can be added insurance. Most carbureted systems up to this horsepower range do not use a return line. Once you get above 450 horsepower, you might want to think about a return-style fuel system.

Can you replace a mechanical fuel pump with electric?

You can place an electric fuel pump anywhere on the body of your vehicle where you can attach a ground wire to the frame. It will take about an hour to convert a mechanical fuel pump to an electric pump.

Do fuel pumps add horsepower?

Horsepower As horsepower increases so does the volume of fuel required to support that power. A good estimator of volume to power is approximately 10 hp per gallon or 2.64 hp per liter. For example if your pump flows at 50 gph it should be able to support a 500 hp engine (50 x 10 = 500).

Can a fuel pump be too big?

As long as the regulator can dump enough fuel back to the tank to keep proper pressure under times of low fuel demand, you’ll be fine. No such thing as too much pump as long as you have a big enough regulator.

Can I use an electric fuel pump with a mechanical fuel pump?

You can run an electric pump with the mechanical but you won’t be able to turn it off and expect the car to still run.

Who makes a Cavalier?

General Motors
Chevrolet Cavalier/Manufacturers

How many GPH is a 700 hp?

Theoretically, the mechanical pump could provide the (approx) 60 gallons per hour that the engine would need, using the formula of 1/2 lb of fuel per horsepower per hour. That’s if you used a quality mechanical pump and not a stocker. So, 700 x . 5 = 350 gal.

Do you need an electric fuel pump for a classic Chevy?

Not only that but electric fuel pumps are smaller (which means less engine bay clutter) and easier to work on. If the mechanical fuel pump in your classic Chevy is either about to give out or not giving enough power to the engine, upgrading to an electric fuel pump is the way to go.

How many volts does a gpa-4 fuel pump use?

For example take a look at our GPA-4 fuel pump assembly flow chart. Now lets assume that your engine requires 60 psi and your fuel pump will be supplied with 13.5 volts. As you look at the chart you can see that at 60 psi and 13.5 volts this pump will flow at 63 gph.

Can a GM fuel tank be modified with an electric pump?

Most GM stock sending units, such as this one, can be modified with an electric pump, but the pump needs a filter sock touching the bottom of the tank. Each Rock Valley EFI fuel tank features a dropped sump in the top of the tank. This allows for adequate floor clearance.

How do you hook up a fuel pump to an electric tank?

Cut the wire and crimp the terminal to the end with your electrical pliers. Follow the fuel line that came from the old fuel pump back to where it connects to the feed line from the tank. Loosen the hose clamp and remove the hose. Attach the new fuel line from the tank to the electric pump with hose clamps.

How much does a Chevy Cavalier fuel pump cost?

The best part is, our Chevrolet Cavalier Fuel Pump products start from as little as $24.99. When it comes to your Chevrolet Cavalier, you want parts and products from only trusted brands.

What do I need to do to replace my fuel pump?

Disconnect the negative battery cable. Disconnect the fuel tank hose at the fuel pump and plug the hose with a bolt or wooden dowel to keep any fuel from flowing out. Also, disconnect the vapor-return hose if the vehicle is equipped with one. Be sure to wipe up any gas that spills.

What kind of fuel pump does GM use?

GM Genuine Parts Electrical Fuel Pumps are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These pumps deliver fuel to your vehicle’s fuel injectors, helping to provide a steady, reliable fuel supply to your vehicle’s engine.

What should fuel pressure be on 85 corvette?

Just an FYI; 83 Camaros and 84 Corvettes with Cross-Fire were factory set for 14 lbs. of fuel pressure. Cross-Fire blogs recommend purchasing the 85 Corvette tuned port pump which run closer to 40-60 lbs. Even on stock Chevy drivetrains. Same fit and the extra flow is tempered with the pressure regulator.