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Raceboy Raceboy is offline
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Join Date: Jun 2009
Location: Estonia, Europe
Posts: 1,197
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RagingBull, it is not fixed lol. Regular FPR will hold the fuel pressure at 3 bar over intake manifold pressure, that's why it has vacuum reference line to it. At idle with vacuum fuel pressure is less than 3 bar, with say 1 bar of boost fuel pressure is 4bar with regards to ambient air pressure. It is called linear fuel pressure regulator.

RRFPR adds more fuel pressure than linear, for example at 1bar boost fuel pressure is not 4 bar but 5 bar of whatever it is set to.
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Old 04-22-2020, 10:30 PM
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