# How Much Horsepower Will A 3/8 Fuel Line Support?

## Which fuel line is return?

The vapour-return line normally runs from the fuel pump or the fuel filter to the fuel tank.

This vapour-return line is connected to a special outlet in the fuel pump.

Any vapour that forms in the fuel pump returns to the fuel tank through this line..

## Can a fuel line be too small?

Return line should always be at least one size smaller than supply line, otherwise you’ll starve the pump. Plumber.

## Is 6AN the same as 3 8?

No they aren’t exactly the same. Most people compare them because they are close and flow roughly the same. According to this, AN and hard line are OD measurements and NPT is inside diameter so for AN and hard line the inside diameter would depend on the thickness of the tubing.

## Does size of fuel line matter?

Does size really matter when it comes to fuel lines? According to the fuel delivery system experts at Fuelab, it does. It’s because fuel line size and length have a direct effect on the amount of fuel pressure drop your fuel system will experience.

## 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).

## How many GPH is a 700 hp?

If you intend to feed 700 hp, a first approximation for the fuel you will need is about 0.5 pounds per hour per hp, so you are looking for a pump that at a minimum can deliver 350 pounds per hour or about 54 gal/hr * at the fuel line pressure you will be using.

## How much HP will 6an fuel line support?

at 45 psi for engines producing up to 870 hp naturally aspirated, or 725 hp forced induction. Its rated at 70gph free flow and a max psi of 65psi.

## What size fuel line do I need?

Place the top of a 1/4-inch wrench with an open end over the fuel line. Slide it carefully over the line so that it fits snugly against the tubing. Read the wrench’s measurements to determine the diameter of the fuel line. Place a caliper over the fuel line if the wrench did not give an accurate reading.

## How much is a fuel pump for 1000 HP?

Making the ChoiceFuel Pump Free FlowCarbureted EngineFuel Injected Engine50 gph/190 lph600 hp500 hp67 gph/255 lph750 hp650 hp90 gph/340 lph1000 hp850 hp125 gph/470 lph1300 hp1000 hp2 more rows•Nov 26, 2019

## Is 5/16 fuel line big enough?

The 5/16 fuel line can surply enough fuel to even go faster. But the reason for a larger line is also so the pump doesn’t have to work as hard.

## Can a fuel line be too big?

The fuel line size being too large won’t really affect the fuel pressure. Excessive fuel pressure is what can cause the fuel to overrun the needle/seats and flood the motor with excess fuel. That being said running a -8AN fuel line is beyond overkill for a 340 but it shouldn’t adversely affect it.

## How much HP can a 340LPH fuel pump handle?

The AEM 340LPH High Flow In-Tank Fuel Pump (PN 50-1000) flows 340 lph (84 gph) at 40 PSI and is capable of supporting over 1,000 HP at 43 PSI.

## How much HP can fuel line support?

Recommended Size, Based on HorsepowerRecommended Fuel Line Size (from the tank to the pump)Engine OutputSize (inches)Size (AN)350 hp or less5/16 in.-5350-450 hp3/8 in.-6450-650 hp1/2 in.-81 more row•Sep 16, 2017

## Is fuel line size ID or OD?

Tubing is OD (outside diameter) and Pipe is ID (inside diameter). So the easiest way to tell the size of your fuel line, which is tubing, is to use a combination wrench. Whichever one slips over snuggly is the winner.

## How much horsepower can a 5/16 fuel line support?

about 500 HPIf you’re just cruising around with a carbed SBC, you’ll probably be fine with a 5/16″ line up to about 500 HP because you’ll never tax the system enough to starve the motor of fuel.

## How much HP will a 3/8 fuel line support?

A 3/8”id fuel line can easily support 600 HP given sufficient “pump head”!

## How much pressure should be on a return fuel line?

The return syle regulator normally holds the pressure in the feed line and the fuel rails at or near the set pressure… around 40 PSI in an EFI system, though it could be higher or lower depending upon the application.

## What is the difference between 6AN and 8AN?

Specifics. The AN numbers refer to the tubing OD in sixteenths of an inch. For example, 8AN hose has the same ID as a 1/2″ nominal tube (8/16 = 1/2). … This means that 6AN hose will not introduce any appreciable flow restriction in a fuel system designed around 3/8″ OD rigid tubing.