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Thread: Need some help with understanding the DFCO.

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  1. #1
    Fuel Injected!
    Join Date
    Feb 2013
    Posts
    463

    Need some help with understanding the DFCO.

    Working on tuning the VE tables and one of the issues I have is that low map, 20-40 areas, upon deceleration, seems to be on the rich side.

    I read a little about how the potential issue could be wet walls from the intake.

    Would a spacer between the TBI and intake take care of this?

    In any case, I might have more adjustments to make across the table itself, albeit, it looks like I am probably close enough with the exception of the high vacuum/no load areas.

    It seems that after making adjustments, the BLM's get worse on the rich side.

    A good example is seen in the following log starting at time 19:40.

    ALSO, I am still curious about the spread sheet used for adjustments, specifically:

    1. Of the logs I have done, I have noticed at most, a 3 point difference between the history and the running averages. Why is the History average better to use?

    2. On the spreadsheet, specifically, what is the difference between the "new BLM with averaged tables" and "without"? Which is better to use?

    I ask this because if one is better than the other, then why have the options there? For people like me that like to over analyze things, it ends up being more of a distraction. (well, maybe just me....)

    here is the bin and log:
    Attached Files Attached Files

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