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Thread: How do I use the 3rd order polynomial excel spreadsheet for MAF curve?

  1. #1
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    How do I use the 3rd order polynomial excel spreadsheet for MAF curve?

    I don't remember who I got it from, but I assume this is what everyone is using to make a nice smooth best fit curve for their MAF tune?

    I am enclosing my latest scan, and editor file prior to modification of MAF tune. Maybe someone can plug in the numbers and better explain what they did to arrive at the correction? I understand basic excel, but the explanation given on the sheet is too much for me to absorbe and correctly understand, ugh. Lol!

    Thanks for any help !
    2002 BSM T/A WS6 #3371 (Sept 12, 2002) "LOB"
    TSP Tqr II (232/234 113lsa +2), ETP Heads, FAST 90/NW 90, 42#SVO, 25% Powerbond Pulley, FLP catted LT's, B&B Tri-Flo, QTEC, Smooth bellows, Fast Toys 85mm lid & Grn Filter, Lou's SS, LG SFC's + X Braces, LG LCA's, LG PHB, LG DSSL, LG TA, Koni SA's lowered, Z06 Front brakes, Earl's SS lines, IForged Classics (18x9.5" F, 18x10.5" R) & very big and expensive stereo... (Eclipse, Zapco, Focal, Lotus)

  2. #2
    Senior Tuner Russ K's Avatar
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    No need for Excel, just use the histogram for the Maf Afr% Error. Then just copy the table & paste into the Maf table in the editor.
    You can use this config file, just set up your wideband pid into the table display. The #7 histogram is the AFR vs Maf Hz, and the
    #8 histogram is the AFR % Error vs Maf Hz.

    Russ Kemp

  3. #3
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    I guess there is different methods for different people? I know EC likes to have a nice smooth exponential curve. I remember some mention that it is okay to have bumps in the curve.

    If I do the copy paste multiply, which is what I have been doing, it looks like the rocky mountain to no end.
    2002 BSM T/A WS6 #3371 (Sept 12, 2002) "LOB"
    TSP Tqr II (232/234 113lsa +2), ETP Heads, FAST 90/NW 90, 42#SVO, 25% Powerbond Pulley, FLP catted LT's, B&B Tri-Flo, QTEC, Smooth bellows, Fast Toys 85mm lid & Grn Filter, Lou's SS, LG SFC's + X Braces, LG LCA's, LG PHB, LG DSSL, LG TA, Koni SA's lowered, Z06 Front brakes, Earl's SS lines, IForged Classics (18x9.5" F, 18x10.5" R) & very big and expensive stereo... (Eclipse, Zapco, Focal, Lotus)

  4. #4
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    Quote Originally Posted by WS6Fury
    I guess there is different methods for different people? I know EC likes to have a nice smooth exponential curve. I remember some mention that it is okay to have bumps in the curve.

    If I do the copy paste multiply, which is what I have been doing, it looks like the rocky mountain to no end.
    You can smooth out the bumps and peaks after each calibration......using the little red circle. You can also smooth the whole curve using the smoothing icons.


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  5. #5
    Senior Tuner Russ K's Avatar
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    Like Howard said.

    Russ Kemp

  6. #6
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    Has anyone created a spreadsheet like that to handle LS2's?
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  7. #7
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    Quote Originally Posted by PurplePiss
    Has anyone created a spreadsheet like that to handle LS2's?
    Here you go, I downloaded both when I found them.
    2002 BSM T/A WS6 #3371 (Sept 12, 2002) "LOB"
    TSP Tqr II (232/234 113lsa +2), ETP Heads, FAST 90/NW 90, 42#SVO, 25% Powerbond Pulley, FLP catted LT's, B&B Tri-Flo, QTEC, Smooth bellows, Fast Toys 85mm lid & Grn Filter, Lou's SS, LG SFC's + X Braces, LG LCA's, LG PHB, LG DSSL, LG TA, Koni SA's lowered, Z06 Front brakes, Earl's SS lines, IForged Classics (18x9.5" F, 18x10.5" R) & very big and expensive stereo... (Eclipse, Zapco, Focal, Lotus)