Kinsler_Handbook_#32 December 2017

Kinsler Fuel Injection, Inc, 1834 THUNDERBIRD TROY, MICHIGAN 48084 U.S.A. Phone (248) 362-1145 Fax (248) 362-1032 131 MECHANICAL FUEL PUMPS FOR EFI PUMP OUTPUT A mechanical pump’s output is close to linear with the RPM at which it is driven. Rotate the pump shaft twice as fast and the flow will double. However, even a good pump is affected by the clearances of the gears and the pressure at the outlet. The flows at very low RPM and very high RPM will be below the linear graph of the pump’s output due to internal leakage, caused by the side clearance required for the gears. This clearance leakage back past the gears has the same effect as a small bypass from the pump outlet back to the inlet. Mechanical fuel pumps are ideal for Electronic Fuel Injection for several reasons: 1. Flow output directly related to engine RPM - decreases demand on Pressure Relief valves throughout the rev range, especially at idle 2. No electric draw - decreases demand on electrical system 3. Fuel compatibility - coated internal pump parts resistant to methanol corrosion; many electric pumps aren’t 4. Fuel pressure - some mechanical pumps are capable of 300+ P.S.I. 5. Weight REQUIRED PUMP SIZE The horsepower and the fuel being used will dictate the required pump size. Pump Model Maximum pump shaft speed (RPM) Minimum inlet fititng size #200-#250 7,000 8 AN #300 6,000 8 AN #400 through #500 6,000 10 AN to 12 AN #550 6,000 12 AN #600-#700 5,000 12 AN #900 through #1300 5,000 16 AN We test and rebuild many types of pumps. To have your pump tested, send it in with all the fittings still in it. Include a day and evening phone number with the area we can call if we need info. ALL SIZES, FLOWS , AND RECOMMENDATIONS FOR FUEL PUMPS ARE FOR GENERAL REFERENCE. CALL US FOR YOUR SPECIFIC APPLICATION !!! © 2017 For more mechanical fuel pump info., see Pg. #101-104, for Pump drives, see Pg. #174-176 Christian Kuhn’s 68’ Mustang powered by a 4.6 liter small block Ford with EFI pounds per hour (lbs/hr) of .720 specific gravity test fluid at 60 o F. K-200 335 305 570 K-300 505 475 845 K-400 670 655 1150 K-500 835 815 1450 K-700 1170 1130 2000 K-1300 2160 2125 3670 KINSLER PUMP SIZES PUMP RPM PSI 2000 0 2000 50 3500 50 FLOWS ARE TYPICAL OUTPUT - ACTUAL OUTPUT WILL VARY SLIGHTLY K-450 770 760 1330