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Siemens indirect electronic injection

Discussion in 'Scrambler How-To's and Guides' started by Bryan Nash, May 17, 2017.

  1. Bryan Nash

    Bryan Nash New Member

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    Hi does any scrambler owners know what PSI the fuel system operates at cheers Bryan U.K.
     
  2. Derek

    Derek Active Member

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    I can't say for definite but most other Ducati FI systems run at 3 Bars.
     
  3. Bryan Nash

    Bryan Nash New Member

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    Cheers for the info Derek I'm going to be running my 20k miles scrambler on twin 39.5mm flat slides dellortos and a straight through exhuast by sc .i can buy a malpassi fuel pressure regulator to carb conversion gizmo which reduces the pump pressure down to 1.5 psi and sends the rest of the fuel back to the tank cheers Bryan.
     
  4. pfmtrumpy

    pfmtrumpy Member

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    Now you're talking...keep us informed please.
     
  5. Hui

    Hui Well-Known Member

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    Would gravity feed not be an option or are the carbs going to be too high ?
     
  6. Bryan Nash

    Bryan Nash New Member

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    I would like to keep the stock tank with the built in fuel pump so that the fuel warning light and trip counter still work and the fuel pump will also act as a stop cock when its not running
     
  7. Derek

    Derek Active Member

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    I wondered why you wanted to know what pressure the injection ran at when you are switching to carbs!
    The pressure regulator is on the return side. If you bypass the regulator inside the tank you will have a similar setup to the old carbed 900ss, where the pump provides a flow but little pressure.
     
  8. Jackson

    Jackson Member

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    Interesting
    I'm thinking of doing same but for opposite reason, I want to get rid of dash and all the lectric wizzardry, manual taps with reserve position for this black duck, can make reserve any amount. On my Guzzi I have different amounts R&L, on Duc that'd be H&V. Kind of 2 warning system.
    But I need bigger tank first & foremost, reserve light or switch two hours run time is ridiculous in Australia (or anywhere as far as I'm concerned)
    Do post up pics etc please
    Where do the flat slide dell ortos come from ? 40mm round slide PHM commonplace
     
  9. Derek

    Derek Active Member

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    How are you going to make the sparks?
    It would be easy to leave the ECU in place but not use the injection part of it but that would require the dash to enable the immobiliser function.
     
  10. Bryan Nash

    Bryan Nash New Member

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    I did not know that but I don't want to get too involved in what goes on in the tank I still have to find out what pressure the curbs run best at and I think a manual adjustable relieve valve hidine under the tank is easyer plus I might need to swop back to injection for MOTs
     
  11. Derek

    Derek Active Member

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    Will your Malossi regulator cope with 3 bar of pump pressure?
     
  12. Bryan Nash

    Bryan Nash New Member

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    It will cope with up too 5bar and it looks like a old diaframed fuel pump from the 60s 70s and about the same size
     

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