[JMG9350]

Does anyone have any MAF transfer data for an older 75mm Pro-Flow meter calibrated for 36lb injectors? Even something relatively close so I can datalog and tune it from there?

[JuiceSC]

36/19=1.894
Multiply your stock maf transfer by 1.9.
Start tuning.

[JMG9350]

Do I leave the volts alone and only multiply kg/hr data?

[JuiceSC]

Do I leave the volts alone and only multiply kg/hr data?

Yes

[Mustang_Mike]

Heres the transfer numbers from my Pro M 36 75mm Unflanged Bullet and the voltage values that look odd are adjusted by BE..

These values are in lb/min as when calculating the throttlebody flow it states to MAP in KG/hr then convert to LB/Min and then enter the info...

15.9998 68.697
5.0000 68.697
4.8000 61.560
4.6001 54.936
4.3999 48.848
4.2000 43.248
4.1001 40.641
3.8999 35.740
3.7000 31.258
3.5000 27.218
3.3000 23.551
3.2000 21.828
3.0000 18.731
2.8000 15.891
2.6001 13.411
2.5000 12.061
2.3000 10.000
2.1001 8.231
1.8999 6.694
1.7000 5.367
1.6001 4.796
1.3999 3.749
1.2000 2.887
1.0000 2.165
0.8000 1.583
0.7000 1.327
0.5000 0.943
0.3000 0.629
0.1001 0.396
0.0000 0.000

Heres how its written exactly on the sheet ...........

16.000 68.024
5.000 68.024
4.800 60.946
4.600 54.408
4.400 48.382
4.200 42.832
4.100 40.252
3.900 35.390
3.700 30.966
3.500 26.952
3.300 23.302
3.200 21.625
3.000 18.533
2.800 15.749
2.600 13.281
2.500 12.163
2.300 10.105
2.100 8.317
1.900 6.771
1.700 5.430
1.600 4.834
1.400 3.781
1.200 2.915
1.000 2.189
.800 1.611
.700 1.350
.500 .941
.300 .633
.100 .400
.000 .307


Just know though that my Pro M meter didnt last too long due to the brains being cheap crap from china with the sensing wire burning out... When I took it out of the tube I realized the fitment issue between the tube body and the spot where the O-ring seals and realized the o-ring was barely sealing due it being too high plus it had an extra feature added which was an Air intake temp sensor built in that wasnt even utilized....



Im sure I can replace the unit from a Cobra but I just switched back to my 70mm MAF from a 94 T-Bird with aluminum housing.



I too was running Holley 36lb injectors with my MAF so heres my injector info I used..

AHISL Fuel - Injector High Slope 35.9995 LBS/HR
ALOSL Fuel - Injector Low Slope 44.1003 LBS/HR

Screenshot 2024-07-08 225350.jpg (60.73 KiB) Viewed 68393 times

Screenshot 2024-07-08 225535.jpg (81.79 KiB) Viewed 68393 times

In order to make my tuning quicker I raised the learning to 24% +/-...

Screenshot 2024-07-08 225432.jpg (20.55 KiB) Viewed 68392 times

Good Luck

[JuiceSC]

That maf data just looks wrong. If thats KG/hr. Your top values should be near 1500

[Mustang_Mike]

That would be how its supposed to look when in LB/Min as when calculating throttlebody flow rate it states to datalog in kg/hr then enter the info in lb/min so I figure it should work the same with displaying the MAF settings....

Screenshot 2024-07-08 233742.jpg (46.68 KiB) Viewed 68384 times

Heres the conversion in kg/hr



15.9998 1869.617
5.0000 1869.617
4.8000 1675.400
4.6001 1495.123
4.3999 1329.421
4.2000 1177.026
4.1001 1106.056
3.8999 972.670
3.7000 850.690
3.5000 740.750
3.3000 640.948
3.2000 594.057
3.0000 509.780
2.8000 432.474
2.6001 364.989
2.5000 328.236
2.3000 272.157
2.1001 223.999
1.8999 182.178
1.7000 146.059
1.6001 130.534
1.3999 102.019
1.2000 78.574
1.0000 58.930
0.8000 43.089
0.7000 36.119
0.5000 25.663
0.3000 17.109
0.1001 10.772
0.0000 0.000




16.000 1851.304
5.000 1851.304
4.800 1658.671
4.600 1480.739
4.400 1316.748
4.200 1165.683
4.100 1095.473
3.900 963.165
3.700 842.769
3.500 733.526
3.300 634.168
3.200 588.544
3.000 504.394
2.800 428.608
2.600 361.440
2.500 331.025
2.300 275.009
2.100 226.344
1.900 184.269
1.700 147.770
1.600 131.548
1.400 102.907
1.200 79.334
1.000 59.564
.800 43.849
.700 36.752
.500 25.600
.300 17.236
.100 10.899
.000 8.364

[JMG9350]

I'll try the injector and MAF data. I also have both 70mm 94-95 Mustang and 70mm 94-95 TBird MAF's. The Mustang MAF is installed right now, and I'm still using the stock A9L MAF transfer data (30pt). I lost the data for the TBird MAF transferring to a new laptop. Is one better than the other? Or preferable?

Thanks for providing some data. I have an appointment with a tuner that is familiar with Foxbody's and QH/BE on the 18th. Hopefully I have a good base for him by then, and he can get it all squared away.

I have been trying to log data while driving the 10 miles to work and back. Lean tip in is an issue, stalling coming to a stop, I don't trust the AFR enough to go WOT. Slight bucking down low.

[JMG9350]

I can't figure out how to upload pictures. It keeps saying the file is too large.

[JMG9350]

Which injector offset did you use? There are 2 in your chart.

[JMG9350]

The tuning session went well. The new engine made 306hp, 346tq to the wheels on a Land and Sea dyno. He said I was very close with the changes I made to the tune, and he made some minor tweaks to MAF transfer, injectors, transient enrichment, and manifold filling.

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