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Old 11-11-2010   #9
Matt D.
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Join Date: Oct 2003
Location: Shoreview, MN
Drives: 2003 Evolution VIII
Posts: 7,752
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Re: Fuel Pump Upgrade

The way I've always understood it is as you start using more fuel the injectors are open more, which in turn causes there to be less pressure in the fuel system. That is why a bigger pump is needed, to help keep the pressure up, as well as simply flowing more fuel when even larger injectors are used.
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03 Mitsubishi Lancer Evolution VIII
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Every minute you spend in your Evo, not in boost, is a minute of your life you'll never get back.
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