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Dyno Talk: For all the DSM dyno queens. Discuss dyno results here. For tuning discussions, use the Tuning Forum.

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Old 07-26-2010, 11:22 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #1 (permalink)
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Registered: Jun 2010
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fuel pressure regulator psi? super afc?


anyone know what psi i need to set it at on my fuel pressure regulator? my car is a 97 eclipse gst. i also have a 1st generation super afc..i dont know what i should adjust all the knobs. help? thanks!

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Old 07-26-2010, 11:35 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #2 (permalink)
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Car: Hyundai Elantra GLS
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fuel pressure should be around 43psi

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Old 07-26-2010, 11:39 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #3 (permalink)
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idk y but it jumps up and down sometimes between 33-43 but it mostly stays at 33 psi
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Old 07-26-2010, 11:48 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #4 (permalink)
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You set the base fuel with the vacuum line off and plugged to 43.5 psi. Once you reattach the vacuum line the fuel pressure will drop about 7-8 psi, assuming you have normal engine vacuum at idle. The fuel pressure with the line attached should change 1:1 with intake manifold pressure. Dropping when there is vacuum in the manifold and rising as there is boost.
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