That tip is not valid for most NA powertrains as no performance gains would come of using a higher MAF output to a PCM that only can compare to the lower max freq value in MAF table of PCM
If the MAF frequency tables in the PCM is looked at you find most GM newer cars like Camaro have a maximum value of 12,200 Hz ( NA engines) or 15,000 Hz for like boost, IE, new ZR1
If you look at a 2010 ZR1 at a drag strip recorded scanner data even at high boost the maximum MAF (air mass ) moved is about 9900 Hz.
No where near the maximum ability of the MAF output or MAF PCM table
In this case max airmass was about 75 lbs and about 1.4 grms/cyl
Stock 2010 ZR1 at drag strip in 90 degree weather
Code:
MAFLb MPH MAP BoostPSI MAFRQ MAFgrms grmcyc MapKpa 75 65 51 11 9720 569 1.389 173 75 65 51 11 9720 569 1.263 173 75 65 51 11 9720 569 1.263 173 75 65 51 11 9888 569 1.263 173 75 65 51 11 9888 569 1.263 173 70 88 47 9 9673 531 1.358 160 70 88 47 9 9673 531 1.281 160 70 88 47 9 9673 531 1.281 160 70 88 47 9 9768 531 1.281 160 70 88 47 9 9768 531 1.281 160 74 89 48 10 9673 558 1.392 162 74 89 48 10 9673 558 1.309 162 74 89 48 10 9673 558 1.309 162 74 89 48 10 9925 558 1.309 162 74 89 48 10 9925 558 1.309 162 74 92 48 10 9768 560 1.350 163 74 92 48 10 9768 560 1.257 163 74 92 48 10 9768 560 1.257 163 74 92 48 10 5298 560 1.257 163 74 92 48 10 5298 560 1.257 163 70 115 47 9 9626 531 1.343 160 70 115 47 9 9626 531 1.296 160 70 115 47 9 9626 531 1.296 160 70 115 47 9 9673 531 1.296 160 70 115 47 9 9673 531 1.296 160 71 117 48 10 9673 539 1.323 164 71 117 48 10 9673 539 1.294 164 71 117 48 10 9673 539 1.294 164 71 117 48 10 9720 539 1.294 164 71 117 48 10 9720 539 1.294 164 73 119 48 9 9673 550 1.341 161 73 119 48 9 9673 550 1.295 161 73 119 48 9 9673 550 1.295 161 73 119 48 9 9828 550 1.295 161 73 119 48 9 9828 550 1.295 161 71 121 49 10 9720 539 1.294 165 71 121 49 10 9720 539 1.262 165 71 121 49 10 9720 539 1.262 165 71 121 49 10 9876 539 1.262 165 71 121 49 10 9876 539 1.262 165 74 124 49 10 9876 560 1.310 166 74 124 49 10 9876 560 1.273 166 74 124 49 10 9876 560 1.273 166 74 124 49 10 9937 560 1.273 166 74 124 49 10 9937 560 1.273 166
If we compare that with the recorded scanner data of a 2010 LS3 Camaro
maximum MAF output is about 8,700 Hz ( no where near the 12,000 HZ MAF limit) and less then 50 lbs airmass peak
In neither case did 400 HP or 640 HP was limited by MAF and that is clear because you would rarely see anyone post having a DTC error of HIGH MAF value hit.
2010 LS3 Camaro
Code:
MAF MPH MAFRQ MAFgrms grmcyc 47 75 8686 355 0.834 47 75 8686 355 0.781 47 75 8686 355 0.781 47 75 8247 355 0.781 47 75 8247 355 0.781 47 75 8247 355 0.781 47 74 8492 355 0.840 47 74 8492 355 0.786 47 74 8492 355 0.786 47 74 8438 355 0.786 47 74 8438 355 0.786 47 106 8492 355 0.816 47 106 8492 355 0.795 47 106 8492 355 0.795 47 106 8583 355 0.795 47 106 8583 355 0.795 46 57 3511 351 0.780 46 57 3511 351 0.923 46 57 3511 351 0.923 46 57 8230 351 0.923 46 57 8230 351 0.923 46 91 8602 351 0.963 46 91 8602 351 0.919 46 91 8602 351 0.919 46 91 8385 351 0.919 46 91 8385 351 0.919 46 70 8501 350 0.882 46 70 8501 350 0.821 46 70 8501 350 0.821 46 70 8686 350 0.821 46 70 8686 350 0.821 46 70 8359 350 0.950 46 70 8359 350 0.827 46 70 8359 350 0.827 46 70 8492 350 0.827 46 70 8492 350 0.827 46 94 8385 350 0.916 46 94 8385 350 0.880 46 94 8385 350 0.880 46 94 8547 350 0.880 46 94 8547 350 0.880 46 94 8547 350 0.880 46 100 8547 350 0.880 46 100 8547 350 0.831 46 100 8547 350 0.831 46 100 8359 350 0.831 46 100 8359 350 0.831 46 104 8359 344 0.818 46 104 8359 344 0.791 46 104 8359 344 0.791 46 104 8492 344 0.791 46 104 8492 344 0.791 45 90 8528 340 0.943 45 90 8528 340 0.903 45 90 8528 340 0.903 45 90 8565 340 0.903 45 90 8565 340 0.903 45 48 8429 339 0.920 45 48 8429 339 0.801 45 48 8429 339 0.801 45 48 8447 339 0.801 45 48 8447 339 0.801 45 65 8510 339 0.872 45 65 8510 339 0.855 45 65 8510 339 0.855 45 65 8501 339 0.855
Since cars today have 20 or more electronic controllers, under sized unshielded wire and other functions can produce/output EMI and RFI so clipping the signal reduces chances of MAF output being effected by the above and also the PCM hardware quad drivers.
As the elevation increases the airmass decreases and the same cars above that were at sealevel would require or use less airmass and see lower MAP.
Being NA engines will never reach 12,200 Hz there would be zero reason or gain changing MAF and in fact the new MAF output would not match the MAF table such as if maximum MAF frequency your PCM is 12,000 Hz and the new MAF outputs 15,000 Hz the PCM would not understand any values above the 12,000 Hz and would require a PCM code segment from another PCM that did support 15,000 Hz