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  1. #1
    Site Admin Green Hulk's Avatar
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    Nitroshark, i have a question

    Can you explain this screen for us? It is injection position.

    Franco Dettori made a comment about there being a lot of power to be gained from this screen, but it was all French to me

    Could you shed some light on this?

    Thanks!
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  2. #2
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    That screen shows the “point of injection”

    I call it on my system the injector end angle. Same deal.

    What the screen does is allow you to adjust the time you want your injectors to fire as it relates to a particular position (in degrees) of the camshaft. If you read this program I made it will explain the timing of it all..

    Injection end angle changes really dont do much unless you are running at 60% injector duty. Im having a hard time understanding why he feels that’s a big power adder. As you are most likely in the 80% + range,,

    Run the calc in the upper right hand corner to get your duty, (PS the injector Ms time will need to be known to do that ,from your data records)

    Anyway,, look at cam timing end angle and move stuff around in this VB .exe to understand “position of injection” < I call it injector end angle.

    Might have to call me if this don’t understand.

    shawn


    http://www.garrigans.com/topfuel/InjectRange2.zip






    .

  3. #3
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    Also to set this table correctly you need a engine dyno like I use, which I don’t think you have. Never fear there is a “ghetto method” that works pretty good . didn’t know if your interested in doing that for your customers or not?

    Let me know if you want to pursue it. I can explain further.

    shawn

  4. #4
    Site Admin Green Hulk's Avatar
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    Shawn, give me some time to look over this and "try" to make sense of it and then i'll give you a call one day and try to learn a bit more.

    Thanks!
    Jerry

  5. #5

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    I've been waiting to hear about what happened on this thread? I have a starting issue and really need to figure out what to do... GP knows less than nothing about this damn thing and what makes it start right up.

  6. #6
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    the starting issues, would not apply to this thread. you would want to look into Warm up calibrations for that.

    sg

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