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  1. #1
    THE AVERAGE USER
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    Citazione Originally Written by megamind Visualizza Messaggio
    The table here on the forum to me is the whole offset
    does not keep the rows and columns

    TABLE 16x20 grommet:
    Injector Duration Table
    x=mm3/str
    y=bar
    z=µsec.
    Ah here...want to know how to calculate the times for a IQ different from the one that you find in the bp...well, look at it ? a speech a p? complicated...why? you must take into account the pressure of the rail...I advise you to keep as much as possible and the bp of the original, where you need to go up with the amount? IQ see some of the other ecu's similar to yours, and copy all of the time...but if you have to calculate them....I can go to the formula that I use...explained in another forum (I can do it without breaking the rules?)

  2. #2
    THE AVERAGE USER
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    But the formula does not think is covered by a copyright...if you're afraid there are always the pm

  3. #3
    THE AVERAGE USER
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    hello...here is the formula that I use...Tinj=(IQ*(K)/√Prail

    as you can see, the times are related both to the rail pressure that the K-factor....of course the K te the revenues with inverse formula...

  4. #4
    THE AVERAGE USER
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    Citazione Originally Written by mariodarkblue Visualizza Messaggio
    hello...here is the formula that I use...Tinj=(IQ*(K)/√Prail

    as you can see, the times are related both to the rail pressure that the K-factor....of course the K te the revenues with inverse formula...
    Good' but I don't know' what' the factor k, where I go to extrapolate?

  5. #5
    THE AVERAGE USER
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    the K-factor ? a constant that makes revenue through inverse formula...for example...you're on the curve of the 1,400 bar...you know that for 80mm3 you need 1200us...you calculate the K of the curve...and then you will be? easy to calculate the new tinj given k, the pressure and the iq

  6. #6
    THE AVERAGE USER
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    Jul 2012
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    I need an example prarico and real, I come back a little complex the explanation..
    maybe when you have the chance? to see the table I posted me a hand to recalculate the column.
    Thanks for the tips

  7. #7
    THE AVERAGE USER
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    Then..? simple and I don't need to see the table...
    For example, I have that:
    PRAIL 1400bar
    IQ 70mm3
    Tinj 1240us
    K= (√Prail * Tinj)/ IQ
    K=662.8
    I've calculated the K-factor for the curve ? 662.8...
    Now, to calculate the new tinj, user? that K...
    Suppose that you enter 80mm3 in bp
    Tinj=(IQ*(K)/√Prail = (80*662.8)/sqrt1400=53024/37.41=1417

    here

  8. #8
    BEGINNER
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    Citazione Originally Written by mariodarkblue Visualizza Messaggio
    Then..? simple and I don't need to see the table...
    For example, I have that:
    PRAIL 1400bar
    IQ 70mm3
    Tinj 1240us
    K= (√Prail * Tinj)/ IQ
    K=662.8
    I've calculated the K-factor for the curve ? 662.8...
    Now, to calculate the new tinj, user? that K...
    Suppose that you enter 80mm3 in bp
    Tinj=(IQ*(K)/√Prail = (80*662.8)/sqrt1400=53024/37.41=1417

    here

    Sorry mariodarkblue, are ignorant of rimappature but I know I can do a bit of accounts and I have made many first to tell you that with your formula if you increase the 10% of the IQ, the increase of the time will be? always 10 %

  9. #9
    THE AVERAGE USER
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    Jul 2012
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    Citazione Originally Written by CHIP TUNNING Visualizza Messaggio
    Sorry mariodarkblue, are ignorant of rimappature but I know I can do a bit of accounts and I have made many first to tell you that with your formula if you increase the 10% of the IQ, the increase of the time will be? always 10 %
    To me that doesn't add up. Practically you say that if you increase to a 10% IQ ricalcoleresti the whole column in the times by adding a 10%?
    But the column if you see the increases in data from the house does not correspond to a fixed percentage, but variable.

  10. #10
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    Citazione Originally Written by megamind Visualizza Messaggio
    To me that doesn't add up. Practically you say that if you increase to a 10% IQ ricalcoleresti the whole column in the times by adding a 10%?
    But the column if you see the increases in data from the house does not correspond to a fixed percentage, but variable.
    I know that the increments the data from the home are not a fixed percentage, but the formula above gives us always the same percentage

    why? prediamo of the case values just to make an example

    For example, I have that:
    PRAIL 1400bar
    IQ 70mm3
    Tinj 1000us
    K= (√Prail * Tinj)/ IQ
    K=534,42
    the calculated K-factor for that curve ? 534,42
    Now, to calculate the new tinj, we use the formula of mario
    Suppose that you insert 70 + 10%= 77mm3 in bp
    Tinj=(IQ*(K)/√Prail = (77*534,42)/sqrt1000=37352/37,41= 1100 cio? 1000+ 10%= 1100

    ANOTHER EXAMPLE example I:
    PRAIL 2000bar
    IQ 90mm3
    Tinj 1000us
    K= (√Prail * Tinj)/ IQ
    K=496,90
    the calculated K-factor for that curve ? 496,90
    Now, to calculate the new tinj, we use the formula of mario
    Suppose that you insert 90 + 20%= 108mm3 in bp
    Tinj=(IQ*(K)/√Prail = (108*496,90)/sqrt2000=53665,62/44,72= 1200 to cio? 1000+ 20%= 1200



    If you then changed the rail pressure then the thing remains the same, but with rail unchanged, the formula gives you a result that is always the same percentage that increased Your IQ

    Check a little bit with different values? But I think I have reason.
    Hello to all

    Citazione Originally Written by franco75 Visualizza Messaggio
    I think that if we talk about IQ, we increase in percentage, the formula I think is valid for the rail pressure
    If you increase the rail pressure then, but apressione rail invarita not need

    If you can be useful in annex I place a tiny little program to calculate the time of injection, I don't know if when andrette to ziparlo there will still be the formulas. Let me know?
    Hello to all

    Give us a look and let me know, why? if all goes well as soon as I have time I improved it better.
    Hello
    File Allegati File Attachments
    Last edited by msport (exil77grande); 24-02-2014 to 13:43

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