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Well with the 1/4" return the lowest I could get my fuel pressure was about 42psi.
Now I've finished running my new 3/8" return line from the SFMU to the tank and I can go as low as about 14psi.
Currently have it set at 18psi, we'll see how this goes. 18psi with 450ccs, Walbro 255HP, and about 15psi of boost. (I've heard some say to set the idle at around 16psi, elsewhere I've heard 20psi... I went in the middle of the two. Idles great, nice an smooth, no almost dying when I first start it. Picks up at lower RPM and pulls in boost better than before when it was super rich.
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Chris Manzione
2.2L Turbo 420a
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