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Nevada - external fuel pump and regulator

Discussion in 'Small Block' started by Martin boichat, Apr 23, 2020.

  1. Martin boichat

    Martin boichat Just got it firing!

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    Location:
    Sydney
    Hi all.
    We have looked through many Posts here and can’t quite get a definitive answer.
    I am looking to replace my Nevada fuel tank and need to have an external fuel pump.
    From what I can see the engine runs at 3 bar, fuel pump 3 bar or similar but the pressure To the injectors is regulated by the regulator. I have three options for setting this up.
    1) all items in line with the pressure regulator return at 5 bar to the tank. (Regulator needs and in,out and return)
    2) no return to the tank - could this blow the engine?
    3) Regulator in return line. Would this regulate the pressure to the injectors ok? (Regulator only needs an in and out)
    I have attached a drawing of these three configs (hopefully)

    upload_2020-4-24_9-26-5.jpeg

    If anyone Has any help on the configurations or parts I would be extremely grateful. This is my first guzzi and the first efi I have worked on.
     
  2. V700Steve

    V700Steve High Miler GT di Razza Pura

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    Location:
    Atlanta area, GA
    Bosch #0580464048 is the pump for external use on a bigblock. There is a FI manual Guzzi put out, very usefull. Todd here has it in resources.
    I would do a return to tank. I have seen a replacement pressure reg on an EV, so , they are out there.
     
  3. Martin boichat

    Martin boichat Just got it firing!

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    Location:
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    Thanks Steve.
    I think that pump may be a bit high flow at 3 bar for my small block. I have seen the Bosch 0580464070 which does 135lh at 3 bar. Stock I think is 95lh at 3 bar.

    My main issue now is finding a 3 bar regulator with return at 5 bar. Just can seem to find the part.
     

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