Thread: Super rich!
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mark houghton mark houghton is offline
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Join Date: Jul 2008
Location: Central Washington State
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Originally Posted by JFairman View Post
If only one fuel pump is running I really don't think it's going to make the car run richer.
If that was true the flowtech modified fuel heads wouldn't have their system fuel pressure regulators shimmed to raise fuel pressure and people would be lowering their system fuel pressure to get more fuel out of CIS.
Good point! Sometimes my logic is illogical. Here's another shot to consider, be it right or wrong:

Maybe the required two pumps has more to do with fuel volume delivery, vs. fuel pressure. Proper system pressure is needed to assure the right control pressures ultimately, which in turn controls how much the metering plate/arm deflects. One pump may provide adequate pressure...but maybe not enough volume? And thus the injectors wouldn't deliver enough fuel due to lower volume????

Just thinking aloud. The Question: Why two pumps in the first place?
Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification.
Old 10-13-2009, 02:27 PM
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