MAF calibration adjustments from LTFT histogram
11-02-2005, 06:08 PM
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MAF calibration adjustments from LTFT histogram Man Ive had a hard day at work and having major brain delays in calculations.
If Im looking at the MAF Table and LTFT+STFT histogram, if I see say a 5% value in 5000hz, do I want to go to the Calibration table for the MAF and add 5% to the value of say 32g/sec? Like do I multiply 32 by 1.05 ? Or should I be subtracting it? Like 32 x .95 ? Damn my brain is fried, system malfunction going on.
Dixit
If Im looking at the MAF Table and LTFT+STFT histogram, if I see say a 5% value in 5000hz, do I want to go to the Calibration table for the MAF and add 5% to the value of say 32g/sec? Like do I multiply 32 by 1.05 ? Or should I be subtracting it? Like 32 x .95 ? Damn my brain is fried, system malfunction going on.
Dixit
11-02-2005, 08:45 PM
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I calibrated it that way and its worked well for me. Below is a link to a write up I did tuning the maf table according to trims
http://www.performancetrucks.net/for...d.php?t=346549
http://www.performancetrucks.net/for...d.php?t=346549
11-02-2005, 08:53 PM
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After thinking about it you were right as I suspected after a few hours. So if my value shows up as +5% I want to add 1.05 to the value to get it almost to 0. Or I can add 1.07 to get it to -2.
Dixit
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11-02-2005, 08:56 PM
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Yes, if positive ltfts multiply the value at the given hertz column by 1.xx, with xx being the ltft value. I just eyball the ltfts while watching a playback of a log run, works well for me.
11-02-2005, 09:15 PM
#5
using the 2.0 histograms that I built
www.audiohelix.com/file
Logging LTFT+STFT and MAF HZ
you can do a Copy/Paste Special/Multiply by %
as you get it real close you can start to do a Multiply by %-half so you dont overshoot...
when its where you want...just add another 1% or 2% to the table to make it richer
www.audiohelix.com/file
Logging LTFT+STFT and MAF HZ
you can do a Copy/Paste Special/Multiply by %
as you get it real close you can start to do a Multiply by %-half so you dont overshoot...
when its where you want...just add another 1% or 2% to the table to make it richer
11-03-2005, 07:28 AM
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In HPT, do you read an average of the cell values or can you switch between peak, average and low values in the LTFT histogram? If so, what values do you use to update your VE table.
I know in Live, we can display high, low, average and cell count in the histogram . I usually adjust my VE table using the average value.
I know in Live, we can display high, low, average and cell count in the histogram . I usually adjust my VE table using the average value.
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11-03-2005, 07:56 AM
#8
Originally Posted by jub jub
In HPT, do you read an average of the cell values or can you switch between peak, average and low values in the LTFT histogram? If so, what values do you use to update your VE table.
I know in Live, we can display high, low, average and cell count in the histogram . I usually adjust my VE table using the average value.
I know in Live, we can display high, low, average and cell count in the histogram . I usually adjust my VE table using the average value.
