These Holley pumps utilize a proven gerotor design. The outside dimensions, however, are compact enough to fit existing hanger assemblies, without modification. The addition of a high output fuel pump is an absolute necessity when other engine modifications such as camshaft, headers, larger injectors, fuel rails and higher flow throttle bodies, etc. are being contemplated. Complete kits and include all parts , accessories and installation instructions along with an inlet filter for improved filtration and durability. These Holley fuel pumps come in three types 190 lph, 255 lph standard and the forced induction 255 lph. The Forced Induction pump flows significantly more fuel at higher pressure. For example at 80 p.s.i. the standard 255 lph will flow 35 gph at that same 80 p.s.i. the equivilent Forced Induction pump will flow 50 gph. These equate to the following:
155 lph = 41 gph = 246 lbs of fuel = 491 hp
190 lph = 50 gph = 301 lbs of fuel = 600 hp
255 lph = 67 gph = 404 lbs of fuel = 800 hp