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Thread: extended ve table

  1. #1
    Fuel Injected!
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    extended ve table

    Is there an 8D bin available that has the extended ve tables in it already? I confess I know nothing about how to add them in, but I do know I won't be able to get a good tune without them.

  2. #2
    Super Moderator Six_Shooter's Avatar
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    Why do you think you will not get a good tune without an extended VE table?

    S_AUJP has an extended table. It's split, as in the extended table portion is a secondary table.
    The man who says something is impossible, is usually interrupted by the man doing it.

  3. #3
    Fuel Injected!
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    It seems to me that with a 3.64 gear I spend a lot of time in the 2100 to 2300 rpm range. Adjusting the blm's at 1600,2000 and 2400, leaves a lot of holes in the tables. Am I doing something wrong that you would ask why I need extended tables to tune?

  4. #4
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    My mistake, I thought the extended tables filled the gaps in the upper table. So- how do I tune the gaps between 16-1800, etc?

  5. #5
    LT1 specialist steveo's Avatar
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    there's no holes. one thing that you have to realize is that a VE table (and most tables) are taken not as a set of values, but as a vector. you're just plotting points along a line to define a wide range of values. it doesn't just step through the table, increasing fuel every 400 rpm just because that's what the table resolution is. it interpolates between the points.

    lets say you have table that goes 1600=80 and 1800=90. if you're running 1700, it'll be around 85. this is because the smoothing is usually linear in between points (there might be some exceptions)

    the same goes in reverse, lets say you want to tune fuel at 1700rpm. you have to change 1600, 1800, or both to affect 1700rpm.

    this amount of resolution should be enough for almost any application.

    it's when you have major curvature between those points that it becomes limiting (lets say there's a dip in VE at exactly 1690-1725rpm). in the real world, this doesn't happen often.

    and if it does you just follow the old rule.... err on the side of more fuel, not less.

  6. #6
    Fuel Injected!
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    Thank you, that makes sense. I'll keep plugging along.

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