Dual Fuel Pump Injector Rales Options

[lmcchesney]

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]

[ArtechnikA]

The rapid increase to WOT, stock rales sees variation in fuel pressure (a decrease from a working 35psi to 20psi or lower). ... The reason is to eliminate the lean spots in the throttle range with an increased displacement engine combined with a D-jet FI system.

okayfine, it's your car, do what you want...

IMO you're chasing a non-problem. have you verified that there actually -is- a lean spot commensurate with the reduced fuel pressure ? (due to the effect of the TPS throttle enrichment "acellerator pump" more fuel is injected during transients...) what is the duration of leanness, if it does occur ? if it's less than a revolution, i don't think it's hurting you.

maybe you're planning a HUGE displacement increase (doubling to 4,0-l or more...) maybe this is a sand drag engine and instantaneous transition to WOT is a major factor. that kind of operating environment would make a difference...

i think i'd just use a CIS fuel accumulator to tide the fuel RAIL over its potential low-pressure transient and be done with it...