Barry Gardner wrote:

Dave & Paul,

You asked about which fuel pressure transducer to buy. I don't
know if Tracy uses something special but typically fuel injection
runs at those higher pressure levels. On the stock Mazda, the
fuel rail runs pressure of about 26-28 psi under light load
conditions but boosts it up (by changing the voltage to the fuel
pump) to between 34 and 40 psi under high load.

The stock fuel pump is supposed to be capable of pressures from
64 to 85 psi on the normally aspirated car and 71 to 92 psi on
the turbo model (according to the Haynes repair manual, which is
my usual bedside reading).

Barry Gardner
Wheaton, IL

 
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