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  1. #1
    superkarl's Avatar
    MAN OF STEEL

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    Injectors - dead time - voltage - pressure

    just trying to interpret this data:
    https://docs.google.com/file/d/0B-z7...it?usp=sharing
    supplied by USRT.
    i like to understand things you see.

    now from what i know injectors have a 12v feed. so why the data for other voltages?
    the differences in dead times seems quite big between say 12v and 14v.
    but they dont alter a great deal with differences in fuel pressure (3bar - 7bar)
    if you run at standard 3bar, with 12v feed, the dead time will be 1.12ms. rising to 1.17 if running say 2bar boost.

    just trying to understand this a whole lot more basically, i like to be a nerd. If someone has good knowledge of this sort of thing please share.

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  3. #2
    beachbuggy's Avatar
    6th Gear

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    Quote Originally Posted by superkarl View Post
    just trying to interpret this data:
    https://docs.google.com/file/d/0B-z7...it?usp=sharing
    supplied by USRT.
    i like to understand things you see.

    now from what i know injectors have a 12v feed. so why the data for other voltages?
    the differences in dead times seems quite big between say 12v and 14v.
    but they dont alter a great deal with differences in fuel pressure (3bar - 7bar)
    if you run at standard 3bar, with 12v feed, the dead time will be 1.12ms. rising to 1.17 if running say 2bar boost.

    just trying to understand this a whole lot more basically, i like to be a nerd. If someone has good knowledge of this sort of thing please share.
    The graph is used when tuning TVUB map which is the voltage compensation map. Injectors don't get a pure 12 volts all the time and this map is used to compensate for that.

  4. #3
    superkarl's Avatar
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    do they use it to try and keep the dead time the same all the time?

  5. #4
    <tuffty/>'s Avatar
    Badger 5 Edition

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    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  6. #5
    RIP S3dave

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    13.8v is more normal running voltage... cranking will be less of course..
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