Fuel Pump Sizing
by Subachad on Feb.07, 2010, under Engine
Total Fuel Flow (lb/hr) = Injector Size (lb/hr) X number of injectors
To convert lb/hr to gallons-per-hour divide by 6.25.
To convert from pounds-per-hour to liters-per-hour divide by 1.64.
To convert from gallons-per-hour to liters-per-hour, multiply by 3.8.
OK, now that this is out of the way lets figure out what I need for my 200 hp 1.8L.
The injector size we figured on is 29.4 pounds/hr
Total Fuel Flow (lb/hr) = 29.4 X 4
Total Fuel Flow (lb/hr) = 117.6
Now we have to convert it to Liters-per-hour since that’s what most pumps are measured by.
117.6 * 1.64 = 192.86
So the fuel pump needed will only need to flow about 193 LPH.
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