Fuel pump requirements - Page 3

FED 387 · 11-27-2019, 02:10 PM

Yep---he needs a pump that can pump about 50 GPH so any pump that satisfies a 520 HP engines demands should work --- no need for a 500 GPH pump its overkill and might lead to other problems such as fuel blowing past the needle and seat do to over pressurization--- I think he was originally referring to a Holley carb not a Q-jet but I could be wrong--- he must remember thats it's the volume of fuel the pump has to provide pressure is a secondary factor --- pump location as well as fuel line size and number of restrictions in the line ( ie.fittings-filters-regulators-number of bends etc) is going to affect the volume of fuel that ultimately arrives at the carb

Dissident · 12-01-2019, 01:20 AM

Cancelling once again cannot get the chart to show up correctly....Sorry.

Dissident · 12-06-2019, 02:26 PM

Trying to post chart again

Horsepower Requires Fuel
(flow estimates for use of gasoline)
Gasoline has a heating value of approximately 19,900 Btu/lb

Hp Fuel Required
300Hp 150 lbs/hr 0.400 gal/min
400Hp 200 lbs/hr 0.533 gal/min
500Hp 250 lbs/hr 0.666 gal/min
600Hp 300 lbs/hr 0.799 gal/min
700Hp 350 lbs/hr 0.933 gal/min
800Hp 400 lbs/hr 1.066 gal/min
900Hp 450 lbs/hr 1.200 gal/min
1000Hp 500 lbs/hr 1.330 gal/min
1100Hp 550 lbs/hr 1.464 gal/min
1200Hp 600 lbs/hr 1.598 gal/min
1300Hp 650 lbs/hr 1.732 gal/min
1400Hp 700 lbs/hr 1.866 gal/min
1500Hp 750 lbs/hr 2.000 gal/min
*based on gasoline with SG 0.750, weighing 6.255 lbs/gal and a BSFC of 0.5lbs/hp-hr.
BSFC is brake specific fuel consumption in pounds of fuel per horsepower-hour.

11-27-2019, 02:10 PM	#21
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,417 Likes: 522 Liked 331 Times in 179 Posts	Re: Fuel pump requirements Yep---he needs a pump that can pump about 50 GPH so any pump that satisfies a 520 HP engines demands should work --- no need for a 500 GPH pump its overkill and might lead to other problems such as fuel blowing past the needle and seat do to over pressurization--- I think he was originally referring to a Holley carb not a Q-jet but I could be wrong--- he must remember thats it's the volume of fuel the pump has to provide pressure is a secondary factor --- pump location as well as fuel line size and number of restrictions in the line ( ie.fittings-filters-regulators-number of bends etc) is going to affect the volume of fuel that ultimately arrives at the carb

12-01-2019, 01:20 AM	#22
Dissident Member Join Date: Jan 2016 Location: Colorado hills Posts: 123 Likes: 11 Liked 73 Times in 36 Posts	Re: Fuel pump requirements Cancelling once again cannot get the chart to show up correctly....Sorry. Last edited by Dissident; 12-01-2019 at 01:34 AM. Reason: to cancel this comment

12-06-2019, 02:26 PM	#23
Dissident Member Join Date: Jan 2016 Location: Colorado hills Posts: 123 Likes: 11 Liked 73 Times in 36 Posts	Re: Fuel pump requirements Trying to post chart again Horsepower Requires Fuel (flow estimates for use of gasoline) Gasoline has a heating value of approximately 19,900 Btu/lb Hp Fuel Required 300Hp 150 lbs/hr 0.400 gal/min 400Hp 200 lbs/hr 0.533 gal/min 500Hp 250 lbs/hr 0.666 gal/min 600Hp 300 lbs/hr 0.799 gal/min 700Hp 350 lbs/hr 0.933 gal/min 800Hp 400 lbs/hr 1.066 gal/min 900Hp 450 lbs/hr 1.200 gal/min 1000Hp 500 lbs/hr 1.330 gal/min 1100Hp 550 lbs/hr 1.464 gal/min 1200Hp 600 lbs/hr 1.598 gal/min 1300Hp 650 lbs/hr 1.732 gal/min 1400Hp 700 lbs/hr 1.866 gal/min 1500Hp 750 lbs/hr 2.000 gal/min based on gasoline with SG 0.750, weighing 6.255 lbs/gal and a BSFC of 0.5lbs/hp-hr. BSFC is brake specific fuel consumption in pounds of fuel per horsepower-hour. Last edited by Dissident; 12-06-2019 at 02:44 PM. Reason: trying to clean up my mess*