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Fuel Line Calculator


Fuel lb/hr:
Gasoline gal/min:
Methanol gal/min:
Ethanol gal/min:
E-85 gal/min:
gal/min: Fuel Line Length-ft:
hose ID in. Density-SG:
Velocity fps: Fuel rail elevation-ft:
Average Specific Gravity
Gasoline SG: 0.700
Methanol SG: 0.790
Ethanol SG: 0.780
E-85 SG: 0.780
Pressure Loss due to friction:
Pressure Loss due to head:
Total pressure loss:


Ideal sizing would be 1-4 feet per second, if velocity becomes higher the Reynolds number increases, increasing turbulent flow and performance decreases

Reminder - These gal/min figures are ideal conditions that do not exist without further considerations that the calculator provides and are used to determine velocity for pressure loss calculations.

This formula for pressure loss is based on the Colebrook equation using the Darcy-Weisbach friction coefficient

Average D'Arcy-Weisbach Friction Coefficient for smooth hose, drawn steel tube, aluminum tube with recommended Reynolds numbers: 0.08

Colebrook Equation:
1 / λ1/2 = -2 log [ 2.51 / (Re λ1/2)  +  (k / dh) / 3.72 ]
where-
λ = D'Arcy-Weisbach  friction coefficient
Re = Reynolds Number
k = roughness of duct, pipe or tube surface (m, ft)
dh = hydraulic diameter (m, ft)
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