| and the fuel filter. According to Ash at Ashspec for the fuel pressure: (The "base" fuel pressure is 43.5psi (3bar). This is the fuel pressure required at 0psi of manifold pressure. For each psi increase or decrease in manifold pressure from 0psi, the fuel pressure must also rise or fall by that same amount. Example: At idle, the manifold vacuum is about ~-6psi. Your fuel pressure at idle should be ~38psi. At 10psi of boost, your fuel pressure should be at least 53.5psi. (add 10psi to the base fuel pressure) At 20psi of boost, your fuel pressure should be at least 63.5psi.)
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