Increasing fuel pressure on the SHO
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From Nick Chrimes, BaySHO Performance:
Stock fuel pumps are 112 Liters Per Hour for the MTX and ATX Gen 1s and 2s, although many ATXs have the standard Taurus 65LPH, barely adequate for the application.
Pumps are obsolete from Ford. A popular alternative is the Walbro 155 LPH pump. Although this pump delivers more fuel to the rails than is required, the return line can handle the excess fuel.
However, a 255 LPH Walbro pump should not be used unless you have forced induction. The return line won't be able to handle the excess fuel.
