Increasing fuel pressure

[Steve Spiers]

Hi

I want to install an adjustable rising rate fuel pressure regulator. There are a
few different brands, Malpassi, FSE etc. They all look the same and I think they
are just branded differently. I have access to a Malpassi.

Anyway, I have not been able to find any information of how adjustable or how
much of an incresing rate they have. Ive calculated (guessed) that I need around
5 bar fuel pressure at 30psi absolute manifold pressure. If it was set up like
this (if at can be) what does this give me at idle (20in/hg) and say 1 bar
absolute? I would assume the pressure at idle has to be increased somewhat, lets
say 10psi? At +10psi, there should be enough adjustment to achieve a correct
idle mixture, but if the fuel pressure has too much higher than that I think I
will run out of adjustment. Im not really a fan of adjusting the AFM spring
tention. Thoughts?

Steve


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