A 3/8”id fuel line can easily support 600 HP given sufficient “pump head”! Given a big enough pump a 3/8” steel line could support 1000 HP. … If the pressure falls as the engine RPM’s go up you need more pump head. More pump head can be achieved with a bigger pump, higher pump voltage and/or increasing the line size.
Can a fuel line be too big?
However, in fuel line we are talking about diameters in fractions of inches and line length in multiple feet, so wall friction tends to dominate. Assuming everything is sized correctly, you cannot be too big with a remote pump/regulator set up.
What size should my fuel return line be?
The Fuel Return Line should be at least the same size, or one size larger than the supply. Make sure there are no sharp bends or kinks. The return line should direct fuel close to the bottom of the tank and away from the pickup.
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.
What size fuel line do I need for 1000 HP?
Recommended Fuel Line Size (from the tank to the pump)Engine OutputSize (inches)Size (AN)350-450 hp3/8 in.-6450-650 hp1/2 in.-8650-1,000 hp5/8 in.-10
How much pressure does a fuel line have?
Regular Fuel Line: PSI. Fuel injection hoses must be able to take air pressure of at least 50PSI. However, an SAE 30R9-rated fuel injection hose would be able to withstand 100 PSI. A PTFE hose with AN6 can take pressure up to 2500 PSI.
What size hose is 10 an?
AN SizeMetal Tube O.D.Thread Size-10 AN5/8″7/8″ – 14 SAE-12 AN3/4″1-1/16″ – 12 SAE-16 AN1″1-5/16″ – 12 SAE-20 AN1-1/4″1-5/8″ – 12 SAE
What size is fuel hose?
AN SizeTube or Hose ODTube or Hose ID-63/8”.297”-81/2”.391”-105/8”.484”-123/4”.609”
What size is 6AN fuel line?
Male Thread SizeAN Size*Equivalent Tube Size (Nominal OD)3/8-243AN3/16″7/16-204AN1/4″9/16-186AN3/8″3/4-168AN1/2″
What size is metal fuel line?
For most recent cars, supply is 5/16″ and return and vent are both 1/4″.
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How much pressure is in a fuel return line?
around 40 PSI in an EFI system, though it could be higher or lower depending upon the application. The return line should only have residual pressure on it…a PSI or two caused by the reistance of the fuel line to flow.
Does Holley sniper need a return line?
No return line needed. Seal off all other inlets and outlets of the Sniper throttle body, except of course the one inlet you choose to use. I don’t see a vent in that sending unit. You’ll need to make sure the tank is vented or add a vent.
Do you need a return line on a fuel cell?
if your just running a regular mechanical pump or a electric pump around 7 psi. then no need for a return line. return lines are for fuel injection where the pump is always running at full steam. just cap it off, you’ll be fine.
Why do you need a fuel return line?
Return-style systems require fuel pumps to work all the time—it never shuts off as long as the engine’s running, which can shorten the life of the pump. Your plumbing system can become more complicated because you have to run a separate return line from the regulator to the tank.
How much horsepower can a 6AN fuel line support?
“A rule of thumb; 5/16″ (-5AN) will support up to 300 horsepower, 3/8” (-6AN) will cover up to 500 HP, and 1/2″ (-8AN) is good to 700HP.”
How do I know what size hose I need?
To determine what length you need, measure the distance from your water source to where you will need the hose. The longer the hose, the more it weighs and the more storage space it will take up. For small yards, patios, and balconies, 25 feet should be enough.
What size is #12 hose?
HOSE I.D (Inches)All EXCEPT Transportation & Refrigerant HosesTransportation & Refrigerant Hoses-81/213/32-105/81/2-123/45/8
How do you measure a fuel hose?
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.
What psi should my fuel pressure be?
Because, the average fuel pressure, can be anywhere from 45 psi to 55 psi. To be sure, consult with your vehicle owner’s manual; for the proper fuel-pressure range, before performing this test.
What should fuel pressure be at idle?
When an engine is idling, it may be pulling 20 inHg of vacuum, which translates to roughly 10psi. The reference to the regulator will allow it to adjust and lower the pressure in the rail to 48psi, resulting in 58psi effective pressure, which is the same as the base pressure.
What should fuel pressure be on a carbureted engine?
Controlling Fuel Pressure Settings Fuel pressure should be set between 6 and 8 psi for a gasoline carburetor. An alcohol carburetor is a different animal with very different requirements. The Alky carburetor will require 4 to 5 psi at idle and 9 to 12 psi at wide open throttle.
What is the ID of 3/8 fuel line?
Part Number: 555-15996. 3/8 in. I.D.
What is an an 6 fitting?
In bolts the number refers to the diameter of the bolt whereas in a fitting it refers to the OD of the tube and thereby have different threads. For example, AN6 bolt has a 3⁄8-24 thread whereas an -6 AN fitting has a 9⁄16-18 thread.
What size fits for a 5/16 hose?
AN SizeHose i.d. – Tube o.d.SAE Thread Size-41/4 in.7/16 in.-20-55/16 in.1/2 in.-20-63/8 in.9/16 in.-18-81/2 in.3/4 in.-16
Is vinyl tubing good for fuel line?
Tygon fuel hose. Small engines on your lawnmower, ATV or motorcycle use a gas-resistant vinyl tubing called Tygon. … Standard rubber vacuum or heater hose should never be used in fuel applications.
Is polyurethane tubing good for gasoline?
It has exceptional resistance to most gasoline, oils, kerosene, and other petroleum-based chemicals, making PU tubing and hose an ideal choice for fuel lines (although additives in today’s gasoline and petroleum products warrant field testing).
Do I need a return line with a fuel pressure regulator?
Advantages. Requires no fuel return line and fittings from the regulator to the fuel tank. This reduces weight, complexity (routing a return line can prove to be difficult), and expense. … Multiple regulators (set at different pressures, such as with a nitrous oxide system application) may be used from one pump.
Does a fuel injection return line have pressure?
In return-type systems, fuel is returned at a lower pressure than that found in the feed line or fuel rail. These can be replaced and upgraded as required. … These regulators work by allowing the line pressure to build to a level higher than normal line pressure before venting excess pressure back to the tank.
Can Holley sniper EFI handle boost?
Advanced boost control is available via free Sniper EFI tuning software, including Boost vs RPM and Boost vs Time – Same popular boost control offered in Holley HP and Dominator EFI systems! 2.5 Bar MAP sensor included which safely works on applications up to 21.5 PSI.
Does Holley sniper EFI need a spacer?
No need, the Sniper TBI works best with a 4-hole spacer.
