* All overflow valve kits contain two banjo seals and detailed instructions *
STOCK FUEL SYSTEMS AND STOCK LIFT PUMP
OFV010 The overflow valve is assembled with a chrome ball, a high tensile spring and a Buna seal. The OFV010 is for use with diesel fuel ONLY. WVO and biodiesel will destroy the seal (over time). Use this valve on a stock Cummins diesel fuel system that has the stock lift pump. Standard replacement for the Cummins 5.9 and 8.3 built with a P7100 injection pump. (stock Cummins lift pump, stock to modified Bosch P7100 pump and Cummins filter) The OFV010 is not to be used with the FASS or Air Dog pumps.
OFV020 This overflow valve is built with premium components to withstand WVO and biodiesel. We use a hardened stainless steel ball, a stainless steel spring and Viton seal. Use the OFV020 with WVO and biodiesel or with regular diesel fuel. Some customers will install the OFV020 if they anticipate using non standard diesel fuel in the future. The valve is sized for a stock fuel system. (stock Cummins lift pump, stock to modified P pump and Cummins filter) This valve will fit the Cummins 6BTA and 8.3CTA. The 8.3CTA is often used in commercial vehicles and motorhomes. The OFV020 is not to be used with the FASS or Air Dog pumps.
BOOST PUMP FEEDING THE STOCK LIFT PUMP
P7100 PERFORMANCE FUEL SYSTEMS
ONLY use with the FASS or Air Dog Pumps
Tork Teknology had this valve in the testing stage throughout the summer of 2010. We had several prototype kits out in the field being tested. What we found was very consistent on performance P pump trucks with electric fuel pumps. The fuel pressure drops to as low as 17 PSI during full throttle runs.
The cause of the low fuel pressure is the inlet hole size (Tork and Bosch both), which bypasses anywhere from 35 to 69% of the fuel back back to tank. The 040HP, 050HP, 060HP and 075HP valves will have different size outlet holes to match the fuel system mods and pressures desired. The valve will not have a seat, spring and ball as they are totally unnecessary. You simply turn your ignition key on for 2 seconds and start the engine. In all our tests, pressure rose to 30 PSI in less than 2 seconds. These valves will be in the 35 to 55 PSI range.
OFV040HP This valve is for lightly modified fuel systems that use the FASS or Air Dog fuel pump. Fuel pressure will be in the 30 to 37 PSI range.
OFV050HP Use the OFV050HP with moderately modified engines. Fuel pressure will be in the 37 to 45 PSI range.
OFV060HP This valve is for highly modified, maximum street performance Cummins engines. Fuel pressure will be in the range of 43 to 50 PSI.
OFV075HP The 075HP is for Racing ONLY, whether your Cummins 12V is a sled puller or drag racer. Depending on the pump you use and the modifications made to your P7100 injection pump, you will see fuel pressure in the 50 to 55 PSI range.