Jet Sizing for WRX

[hotrod]

Most of your technical references like the NACA reports specified by mass, usually lb water / lb fuel.

Injectors are rated on a volume/min basis if their flow is specified in cc they are rated in cc/min. American cars sometimes specify injector flow in lbs/hr. The assumed density of gasoline is usually about 6.5 lbs/gal.

A U.S. gallon is defined as 231 cubic inches volume, or 3785.4118 cc.
A gallon of water weighs 8.337 lb at normal temps, or 3785.4118 grams (454 grams /lb AND 454 cc/lb)

Water is the standard for density, ie 1 cc = 1 gm so for practical purposes you can measure the WI flow either as mass or volume.

1 gal/hr is approximately 63 cc/min

Methanol = 0.793 g/cm3
gasoline = 2950 g/gallon = .7795 gm/cc (approximately depending on the blend)

Larry