just to show - its super simple, effective and works so I been using this since 08 and everyone still ****s on it and ****s on maf tuning so im just gonna post the text file to show the changes
i kept the stock maf file for a N* v8 truck given from a member here
I had "decent" trims but i was not getting my MPG that I was used to
one cruise , one file transfer into the program, loaded it back to my ecu and well im locking +/- 2 while cruising now and my MPGs are back into the 30s
This file was generated on 9/1/2016 at 10:22 PM
It is a good idea to turn off 'Word Wrap' to view this file if your screen resolution
is less than 1024 X 768 and your using notepad. Also, a fixed width font such as
Courier New will make it a lot easier to read the table at the bottom of this report
**The changes created by this program are only suggestions based upon the imported scan.
====== File information =====
The path to the scan file that was imported was:
C:\Users\Bob\Desktop\Tuning\scans\september 2016 mpg tune.csv
The path to the MAF table that was imported was:
C:\Users\Bob\Desktop\Tuning\scans\september 2016 TableData.txt
The suggested MAF table has been generated and was saved to:
C:\Users\Bob\Desktop\Tuning\scans\september 2016 NEW Table Data.txt
====== Applied Filters =====
No fuel cell filters were used, all fuel cells (0-5) were used in the calculations
Only the Long Term Fuel Trim (LTFT) was used to calculate fuel trim
No RPM filtering was used, all RPM ranges were included
No MAF frequency filtering was used, all MAF ranges were included
No TPS filtering was used
No Air/Fuel ratio filtering was used.
No ECT filtering was used
The Fuel Trim Modifier was set to 50%
Variable Fuel Trim Adjustments were made based on LTFT for each MAF cell - VTA_Value = 7
Correction = ((Average Fuel Trim / 100) * MAF Cell Value ) * ((Average Fuel Trim * VTA_Value) / 100)
The Hit Counter was set to 1. This means the fuel trims must
not have been 0 for at least 1 frames within the specified range.
For example, this keeps blips of +10 fuel trims from skewing the calculations.
====== Boost, TP %, and PE Information =====
RPM Cell: 2400 Average TPS: 28.6154 High TPS: 32 Low TPS: 27
Average MAF: 6542.385 Average RPM: 2406.385
RPM Cell: 2800 Average TPS: 31.4 High TPS: 33 Low TPS: 29
Average MAF: 6886 Average RPM: 2838.6
This is the AVERAGE TP % when the engine started making boost for each RPM cell
in the PE_Enable_TPS table.
This was figured by averaging the TP% in each row where the MAP kPa was
between 97 & 102, the TP% was the same or higher than the previous
scanned row, and the transmission was in 3rd gear.
Also, there must have been at least 3 rows in each RPM cell before
calculations would have been performed.
These values are averages, check your scan data before making changes to PE_Enable_TPS.
====== Change Table Description =====
The following table explains the suggested changes. It contains:
MAF cell - This corresponds to the cell in the MAF table
Old MAF Value - the value from the imported MAF table
Average FT - This is the average Fuel Trim calculated from the imported scan file
Adjustment Amount - the adjustment amount to be applied to the current MAF
Suggested Change - This is the calculated changes to be applied to the old MAF table
Hits - This is the number of times a non-zero fuel trim was logged in this cell
====== How adjustments were calculated =====
The Adjustment Amount is calculated by figuring the average Fuel Trim for
each cell in the MAF table, then applying it as a % to the MAF table value.
Any blank spaces indicate no change was to be applied Either the fuel trim
average was 0, a filter was applied, or the MAF cell affected was not in the scan
====== Possible problems in the MAF table =====
These are areas where the difference between 2 cells is greater than 15% or less than 2%
The only cells that were checked were cells that matched the imported scan data.
Because of the variations in MAF frequencies through out the table, this is something
that should be manually adjusted if needed. The suspect MAF cell is shown in ( )
You are estimating missing MAF cells, the variance may have been calculated using
the original MAF values. If you don't see a problem in the indicated cells, check
the original values to see if the variance was calculated from there. If so, no
problem is present - the variance was in the original MAF table.
Note: This does not indicate a problem. These are simply areas that may need to be
looked at a little closer.
Varience between MAF cell 2500 and (2625) is 22.01216%
MAF Cell | Old MAF Value | Average FT | Adjustment Amount | New MAF Value | Hits | Cell Variance | Adjustment Percent
================================================== ================================================== =================================
Hertz 1500 0.20978 0.20978 0 0% 0%
Hertz 1625 0.24802 Estimated 0.25060 0 18.22862% 0%
Hertz 1750 0.29142 Estimated 0.29453 0 17.4986% 0%
Hertz 1875 0.34103 Estimated 0.34361 0 17.02353% 0%
Hertz 2000 0.39580 Estimated 0.39839 0 16.06017% 0%
Hertz 2125 0.45574 Estimated 0.45936 0 15.14401% 0%
Hertz 2250 0.52291 Estimated 0.52550 0 14.73867% 0%
Hertz 2375 0.59525 Estimated 0.59887 0 13.83412% 0%
Hertz 2500 0.67482 Estimated 0.70931 0 13.36749% 0%
Hertz 2625 0.76163 16.21061 0.06173245 0.82336 66 22.01216% 50%
Hertz 2750 0.85464 16.07647 0.06869796 0.92334 17 12.14234% 50%
Hertz 2875 0.95694 10.27021 0.04913989 1.00608 47 8.96118% 50%
Hertz 3000 1.06649 8.444216 0.04502836 1.11152 597 10.48013% 50%
Hertz 3125 1.18430 6.110394 0.03111712 1.21542 491 9.34746% 43%
Hertz 3250 1.30934 7.197682 0.04712106 1.35646 258 11.60457% 50%
Hertz 3375 1.44265 5.490355 0.03009851 1.47275 197 8.57286% 38%
Hertz 3500 1.58423 3.658383 0.01506887 1.59930 161 8.5928% 26%
Hertz 3625 1.73821 2.171425 0.00566159 1.74387 196 9.03976% 15%
Hertz 3750 1.90355 2.890862 0.0110058 1.91456 208 9.78766% 20%
Hertz 3875 2.08233 3.155487 0.01445568 2.09679 164 9.51814% 22%
Hertz 4000 2.27352 2.203506 0.007514574 2.28103 171 8.7872% 15%
Hertz 4125 2.47917 1.610501 0.004391976 2.48356 219 8.87876% 11%
Hertz 4250 2.69722 0.9639582 0.001820005 2.69904 283 8.67617% 7%
Hertz 4375 2.92870 0.7481055 0.001095488 2.92980 343 8.54954% 5%
Hertz 4500 3.17362 0.7338235 0.001164438 3.17478 340 8.36198% 5%
Hertz 4625 3.43198 0.0689716 0 3.43198 506 8.1012% 0%
Hertz 4750 3.70273 -0.1560049 -5.776442E-05 3.70267 666 7.88735% 1%
Hertz 4875 3.98692 -0.4868164 -0.0005822694 3.98634 402 7.6611% 3%
Hertz 5000 4.28248 -0.9471145 -0.002839199 4.27964 503 7.35771% 7%
Hertz 5125 4.59147 -1.105701 -0.004061433 4.58741 421 7.19144% 8%
Hertz 5250 4.91596 -2.830258 -0.02782687 4.88813 347 6.55543% 20%
Hertz 5375 5.25596 -4.182144 -0.06374543 5.19221 308 6.22081% 29%
Hertz 5500 5.62179 -4.506938 -0.08107857 5.54071 274 6.71191% 32%
Hertz 5625 6.00725 -5.324996 -0.1183578 5.88889 300 6.28405% 37%
Hertz 5750 6.41132 -4.925745 -0.1073738 6.30395 101 7.04808% 34%
Hertz 5875 6.83502 -4.595653 -0.1005164 6.73450 69 6.82997% 32%
Hertz 6000 7.27732 -4.285049 -0.09355102 7.18377 107 6.67109% 30%
Hertz 6125 7.73616 -2.935134 -0.04768401 7.68848 37 7.02566% 21%
Hertz 6250 8.21463 -2.194118 -0.0270358 8.18759 17 6.49177% 15%
Hertz 6375 8.71170 -1.11 -0.00773599 8.70396 20 6.30673% 8%
Hertz 6500 9.22841 0.5216215 0.001925495 9.23034 37 6.04749% 4%
Hertz 6625 9.76476 -0.2363635 -0.0004616066 9.76430 11 5.78487% 2%
Hertz 6750 10.32590 -1.42 -0.01466278 10.31124 10 5.60142% 10%
Hertz 6875 10.91082 -0.3571429 -0.001169017 10.90965 7 5.80351% 3%
Hertz 7000 11.51743 -0.8 -0.005528366 11.51190 6 5.52035% 6%
Hertz 7125 12.14575 Estimated 12.15435 0 5.50603% 0%
Hertz 7250 12.79680 Estimated 12.80713 0 5.36031% 0%
Hertz 7375 13.46852 Estimated 13.48040 0 5.24913% 0%
Hertz 7500 14.16401 Estimated 14.17383 0 5.16382% 0%
Hertz 7625 14.87914 Estimated 14.89102 0 5.04892% 0%
Hertz 7750 15.61803 Estimated 15.62940 0 4.96594% 0%
Hertz 7875 16.37966 Estimated 16.39103 0 4.87661% 0%
Hertz 8000 17.16402 Estimated 17.17591 0 4.78863% 0%
Hertz 8125 17.97215 Estimated 17.98507 0 4.70828% 0%
Hertz 8250 18.80612 Estimated 18.81491 0 4.64034% 0%
Hertz 8375 19.65766 Estimated 19.67160 0 4.52799% 0%
Hertz 8500 20.53709 Estimated 20.55053 0 4.47373% 0%
Hertz 8625 21.44340 Estimated 21.45735 0 4.41304% 0%
Hertz 8750 22.37761 Estimated 22.39104 0 4.35663% 0%
Hertz 8875 23.33869 Estimated 23.35419 0 4.29483% 0%
Hertz 9000 24.33077 Estimated 24.34937 0 4.2508% 0%
Hertz 9125 25.36005 Estimated 25.38021 0 4.23036% 0%
Hertz 9250 26.42964 Estimated 26.44101 0 4.21762% 0%
Hertz 9375 27.52196 Estimated 27.54160 0 4.13293% 0%
Hertz 9500 28.65355 Estimated 28.67112 0 4.11159% 0%
Hertz 9625 29.82028 Estimated 29.83784 0 4.07186% 0%
Hertz 9750 31.02214 Estimated 31.04074 0 4.03035% 0%
Hertz 9875 32.26121 Estimated 32.27412 0 3.99415% 0%
Hertz 10000 33.52611 Estimated 33.53903 0 3.92081% 0%
Hertz 10125 34.81685 Estimated 34.83442 0 3.84995% 0%
Hertz 10250 36.14272 Estimated 36.16184 0 3.80813% 0%
Hertz 10375 37.50683 Estimated 37.52595 0 3.77423% 0%
Hertz 10500 38.90918 Estimated 38.92984 0 3.73892% 0%
Hertz 10625 40.35286 Estimated 40.37560 0 3.71038% 0%
Hertz 10750 41.84201 Estimated 41.86526 0 3.69032% 0%
Hertz 10875 43.37767 Estimated 43.40299 0 3.67014% 0%
Hertz 11000 44.96397 Estimated 44.99084 0 3.65695% 0%
Hertz 11125 46.60400 Estimated 46.63293 0 3.64743% 0%
Hertz 11250 48.30190 Estimated 48.33343 0 3.64325% 0%
Hertz 11375 50.06285 Estimated 50.09695 0 3.64572% 0%
Hertz 11500 51.89199 Estimated 51.89199 0 0% 0%
