Dual Fuel Pump Injector Rales |
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Dual Fuel Pump Injector Rales |
lmcchesney |
Jan 20 2004, 08:45 AM
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#1
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Member Group: Members Posts: 488 Joined: 24-November 03 From: Ocala, Fl. Member No.: 1,381 Region Association: None |
Thinking about designing the dual pump fuel rales.I was thinking of keeping both pumps up front trunk, and run a second 3/8" fuel line through the center tunnel so each large fuel line feeds each fuel rale on each side of the engine. The return like would be a solitary one from the fuel pressure regulator. However, on arrival to the front trunk, can you connect the return to each pump in series as in the diagram or will it require parallel?
Also, trying to get everything done before the return of the engine, is there anything I should change in the MPS at this time? ie. inserting a space for shims in the spring? I do not think I have the resources for the replacement of the leaf springs, but is polishing helpful? For image see http://www.shoptalkforums.com/viewtopic.ph...=62928&start=15 Thanks L. McChesney[/url] |
lmcchesney |
Jan 20 2004, 12:31 PM
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#2
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Member Group: Members Posts: 488 Joined: 24-November 03 From: Ocala, Fl. Member No.: 1,381 Region Association: None |
Probably not explaining it well enough.
Most of this data is from Ray Green's experience with the adjustment of D-jet. The rapid increase to WOT, stock rales sees variation in fuel pressure (a decrease from a working 35psi to 20psi or lower). Since the injectors are effected by a reduction in working fuel pressure in the rales results in lean spots in the throttle range. In addition to Ray's theory, I plan to increase the holding volume of the rales, thus decreasing the change in pressure in the rales as a result of injector removing fuel from the rales. The reason is to eliminate the lean spots in the throttle range with an increased displacement engine combined with a D-jet FI system. I agree, the use of a high flow pump could be used. The stock pumps are capable of 45-55L/hr. Additionally, because I am changing from a 1.7 system to a 2.0 system, I have two stock fuel pumps readily available. L. McChesney |
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