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Thread: Fuel pressure rise question

  1. #1
    Junior SCH Member
    Join Date
    Mar 2005
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    27

    Fuel pressure rise question

    With 10psi of boost do you see 10 psi increase of fuel pressure?

    I know FPR are suppose to but does it really happen or just come close?

    Before my fuel system upgrade I wasn't. With 10 psi boost I was getting a 5-7psi fuel increase. Just wondering what to expect now with the new fuel system.

  2. #2
    Junior SCH Member
    Join Date
    Feb 2006
    Posts
    21
    yes, you should see 1:1

    If not, relace rubber boost ref lines with plastic, aluminum, braided, or get a new FPR!

  3. #3
    SCH Moderator "SN Guru" speedytang's Avatar
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    Dec 2002
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    Marengo, Ohio
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    If your using Autometer Gauge who knows what you will see. I have had my gauge replaced 4 times in 2 years and it now reads incorrect and needs replaced again. If it is Autometer they have become junk parts. I have a service gauge and it reads really accurate and it is real sensitive and shows every 1/2lb. I think this time when I return the unit I am getting a digital because others in my area have them and they are easy to read when at WOT and they seem to be very accurate.

  4. #4
    Junior SCH Member
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    Mar 2005
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    Which Autometer are you talking about. The electric? That's what I was dataloging from. Maybe that's the problem.

    What digital are you talking about?

  5. #5
    SCH Moderator "SN Guru" speedytang's Avatar
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    Dec 2002
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    2- electric and the senders are good and 3- Mechanical and the last one reads 5psi off with the pressure released. I tried earlier to today and when showing 43lbs I am really at 38lb and when it shows 62lbs I am at 55lbs. It is not even off the same amount each time.

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