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 162 FUEL FILTERS WHY DO YOU NEED ONE ? An injection system that has been properly cleaned, flow tested, and calibrated, should be good for several years of trouble free service. There is ONE gremlin that can cut this to one day, even one minute, perhaps even a few seconds.... DIRT. Dirt is the biggest problem with ANY type of fuel injection system. In years past many of the racers ran without any filter, because the ones on the market were of such poor design that they caused more problems than they solved. The same racers experienced many plugged nozzles, ruined or damaged engines, and many failed to finish a race. Since Kinsler’s introduction of properly designed high capacity filters, it’s not worth the risk to run without one... An element with pleats allows a very large amount of surface area to fit into a compact housing, allow- ing the assembly to have a very low pressure drop for top system performance! DO NOT USE stone type elements: typically they are too restrictive and clog up very easily. For your reference 25.4 micron is approximately 0.001” . A Kinsler 10-micron paper pleated element will trap particles larger than 0.0004” INSTALLATION FOR CONSTANT FLOW SYSTEM We recommend filtering all the fuel coming out of the pump so that all the bypass valves and the barrel valve receive filtered fuel. Do NOT use paper element filters on this type of system: bits of the paper element from the ‘clean’ side of the filter will clog the nozzles and/or glue on the element may dissolve in methanol causing the element to separate. Do NOT use paint strainers or other cloth filters to fill the tank, as lint from them may plug the nozzles. Use our #5610 filter funnel (see Page #182) or a similar metal element strainer. FOR EFI SYSTEM The electric fuel pumps used on EFI systems are susceptible to dirt. Carefully read all information on fuel filters for pump inlets. Pressure relief valves are also very susceptible to small dirt particles. Using the proper filter and keeping it clean is very important. EFI injectors have inlet filters with very little surface area, which means they can not handle large amounts of dirt/ debris. Proper fuel filtration should begin at the fuel tank to protect the pump and the fuel system components. Consult the plumbing schematic for the type of fuel system being used and MAKE SURE the correct type and style of fuel filter is being installed. Fuel pump inlet: pumps are very sensitive to disturbance in the inlet hose. IT IS A MUST to have the correct filter or it will damage the pump and/or cause problems. NEVER have return fuel going back into the pump’s inlet hose. As fuel leaves the pressurized side of the fuel system and enters a non-pressure area the fuel can flash vaporize, causing damage to the pump and erratic running conditions. DESIGN THE PROPER FILTER IS THE BEST INSURANCE AGAINST DIRT RELATED PROBLEMS IN YOUR FUEL INJECTION SYSTEM ! © 2017 #9031 10-micron paper element, it has 35 square inches of surface area #8320 10-micron paper element, it has 74 square inches of surface area - 211% more surface area than #9031 Paper-BRL element Monster Mesh element Due to the extremely tight tolerance in the Lucas equipment there are several filters throughout the system. Mechanical pump inlet, main hose from the pump to metering unit, metering unit inlet fitting, and on each injector. A Lucas system MUST be kept 100% clean. The smallest dirt particle can mean disaster. FOR LUCAS MECHANICAL SYSTEM We offer many different fuel filters for the fuel supply system, disposable lower cost filter assemblies, or billet housings with replaceable filter elements. We recommend, whenever possible, to filter the fuel before it enters the tank. Road vehicles with electric fuel pumps should have a filter to protect the fuel pump. 45 micron Mega Monster Mesh inlet filter, Weldon pump, 10 micron Monster Mesh outlet filter on 4-barrel throttle body system