Hi guys, trying to lose the opti on a stock 1996 LT1 and found that I can repin the harness to use the LS PCM. I downloaded a 2002 express van file from here with the 5.7, is that close enough to use on the LT1 as is? I will have to do a segment swap as I will be running a T56. If this file is not what I need does anyone have a start up and run file for the 96-97 F body LT1 using the 411 PCM? I can use either a bin file or HPT.
Thanks!
https://www.youtube.com/watch?v=nk3pvxJtYyU
I’m wondering if the video is the same as your conversion?
Similar but different, while he removed his opti completely the easierOriginally Posted by dave w
way is to use the opti for the cap and rotor and lose the opti sensor. The 4x
wheel and crank sensor is then used to fire the coil and injectors using the LS PCM.
common file to use to start is an early 5.7 express van file but I don’t know what
mods it needs for the LT1.
2002 L31 .bin files available on gearhead-efi: http://www.gearhead-efi.com/Fuel-Inj...rPro-Bin-Files
One of the challenges I see with the 96 LT1 vs. 2002 Express Van '0411 L31 are the spark tables. The 96 LT1 uses MAP Sensor tables for spark advance and the 2002 Express Van '0411 L31 uses MAF Sensor tables for spark advance.
The 2002 Express Van L31 Injectors are Sequential Fire.
Seems likely the LT1 would benefit using the 2002 Express Van '0411 MAF Sensor?
Seems likely the LT1 would benefit using the 2002 Express Van '0411 Ignition Module?
Seems likely the 2002 Express Van .bin file would require a VATS delete and possibly some Emission deletes also.
Correct, when this conversion is done it runs in batch fire mode. I can turn off VATS and any unneeded codes. As far as the MAF I can swap if needed, but I have to see if that is needed or not, same with the ICM. The 2001 express van tune has also been used, not sure if that is different than the 2002.
No guarantees on this file but it will start and run. Then you can begin the tuning process. The posted file uses a regular 5 wire 2000-2006 Truck MAF
Here is the Express transfer function for the stock 3 wire Express MAF.
Code:MAF Sensor Air Flow Vs. Output Frequency Hz gm/sec 1500 2.422 1625 2.805 1750 3.227 1875 3.695 2000 4.211 2125 4.789 2250 5.430 2375 6.133 2500 6.891 2625 7.703 2750 8.570 2875 9.484 3000 10.461 3125 11.516 3250 12.672 3375 13.945 3500 15.305 3625 16.742 3750 18.250 3875 19.836 4000 21.539 4125 23.359 4250 25.289 4375 27.352 4500 29.539 4625 31.875 4750 34.344 4875 36.938 5000 39.648 5125 42.398 5250 45.219 5375 48.133 5500 51.141 5625 54.273 5750 57.594 5875 61.102 6000 64.781 6125 68.641 6250 72.695 6375 76.953 6500 81.406 6625 86.055 6750 90.883 6875 95.906 7000 101.109 7125 106.500 7250 112.055 7375 117.805 7500 123.734 7625 129.844 7750 136.164 7875 142.672 8000 149.313 8125 156.188 8250 163.273 8375 170.570 8500 178.094 8625 185.859 8750 193.922 8875 202.250 9000 210.844 9125 219.719 9250 228.875 9375 238.320 9500 248.063 9625 258.102 9750 268.453 9875 279.102 10000 290.070 10125 301.352 10250 312.945 10375 324.867 10500 337.102 10625 349.672 10750 362.563 10875 375.781 11000 389.320 11125 403.188 11250 417.383 11375 431.906 11500 446.742 11625 461.906 11750 477.383 11875 493.180 12000 509.297
Last edited by In-Tech; 11-05-2023 at 04:17 AM.
-Carl
Thank you! I have found out that the stock LT1 MAF and ICM will work with the van tune file, so I will compare those MAF values as well. Much appreciated!
The X/Y isn't the same as the '0411 but this might help you extrapolate.
1996 Impala LT1 MAF Transfer function
1996 Vette MAF Transfer functionCode:MAF Sensor Calibration Table Hz gm/sec 1488 1.89 1616 2.20 1744 2.55 1872 2.96 2000 3.40 2128 3.89 2256 4.44 2384 5.03 2512 5.69 2640 6.40 2768 7.15 2896 7.95 3024 8.80 3152 9.73 3280 10.73 3408 11.80 3536 12.95 3664 14.17 3792 15.49 3920 16.91 4048 18.44 4176 20.05 4304 21.74 4432 23.51 4560 25.36 4688 27.30 4816 29.32 4944 31.43 5072 33.62 5200 35.90 5328 38.30 5456 40.83 5584 43.49 5712 46.29 5840 49.23 5968 52.34 6096 55.61 6224 59.09 6352 62.72 6480 66.52 6608 70.48 6736 74.59 6864 78.85 6992 83.27 7120 87.85 7248 92.58 7376 97.45 7504 102.48 7632 107.66 7760 112.97 7888 118.44 8016 124.07 8144 129.86 8272 135.82 8400 141.95 8528 148.26 8656 154.73 8784 161.42 8912 168.33 9040 175.40 9168 182.82 9296 190.52 9424 198.49 9552 206.75 9680 215.30 9808 224.16 9936 233.34 10064 242.82 10192 252.63 10320 262.77 10448 273.23 10576 284.04 10704 295.18 10832 306.66 10960 318.48 11088 330.64 11216 343.14
Code:MAF Sensor Calibration Table Hz gm/sec 1488 2.44 1616 2.86 1744 3.30 1872 3.80 2000 4.36 2128 4.99 2256 5.70 2384 6.47 2512 7.30 2640 8.20 2768 9.16 2896 10.19 3024 11.30 3152 12.48 3280 13.73 3408 15.09 3536 16.54 3664 18.11 3792 19.80 3920 21.59 4048 23.52 4176 25.55 4304 27.69 4432 29.94 4560 32.28 4688 34.69 4816 37.25 4944 39.91 5072 42.69 5200 45.58 5328 48.63 5456 51.83 5584 55.20 5712 58.77 5840 62.52 5968 66.47 6096 70.62 6224 74.96 6352 79.52 6480 84.27 6608 89.23 6736 94.41 6864 99.80 6992 105.41 7120 111.23 7248 117.27 7376 123.52 7504 129.98 7632 136.66 7760 143.54 7888 150.60 8016 157.89 8144 165.39 8272 173.11 8400 181.01 8528 189.24 8656 197.90 8784 206.75 8912 215.86 9040 225.23 9168 234.88 9296 244.77 9424 254.94 9552 265.36 9680 276.05 9808 286.99 9936 298.20 10064 309.66 10192 321.39 10320 333.38 10448 345.63 10576 358.13 10704 370.89 10832 383.91 10960 397.19 11088 410.73 11216 424.52
Last edited by In-Tech; 11-05-2023 at 05:31 PM.
-Carl
Thanks, my engine is from an F body but I would think the numbers would be the same as the vette. The B body uses a different smaller MAF sensor than the F body, at least it does on the 94/95s that I have had.
I wonder about '0411 injector parameters LT1 vs. L31?
1997 LT1 Camaro MAF Transfer funcion
Code:MAF Sensor Calibration Table Hz gm/sec 1488 2.45 1616 2.88 1744 3.34 1872 3.87 2000 4.45 2128 5.12 2256 5.85 2384 6.64 2512 7.49 2640 8.41 2768 9.40 2896 10.46 3024 11.60 3152 12.82 3280 14.11 3408 15.48 3536 16.98 3664 18.60 3792 20.34 3920 22.22 4048 24.23 4176 26.35 4304 28.60 4432 30.97 4560 33.43 4688 35.99 4816 38.69 4944 41.54 5072 44.52 5200 47.66 5328 50.97 5456 54.42 5584 58.04 5712 61.81 5840 65.77 5968 69.92 6096 74.27 6224 78.82 6352 83.59 6480 88.58 6608 93.80 6736 99.25 6864 104.93 6992 110.88 7120 117.04 7248 123.42 7376 130.03 7504 136.87 7632 143.92 7760 151.14 7888 158.63 8016 166.31 8144 174.03 8272 182.36 8400 191.01 8528 200.07 8656 209.43 8784 219.12 8912 229.15 9040 239.52 9168 250.23 9296 261.30 9424 272.71 9552 284.48 9680 296.61 9808 309.10 9936 321.96 10064 335.20 10192 348.80 10320 362.77 10448 377.14 10576 391.88 10704 407.02 10832 422.55 10960 438.46 11088 454.78 11216 471.51
Last edited by In-Tech; 11-05-2023 at 09:35 PM. Reason: Added file
-Carl
The LT1 ran 24 pound injectors stock, I have never looked at an LS PCM tune running at vortec (yet, still have to get this one loaded onto a PCM), if the tables are set up the same I will adjust if needed.
Thank you again!
Hiya,
You're welcome.
Those early MAF's aren't so good, especially with a non stock inlet air tract. Just trying to get you a decent starting point for your tuning process.
-Carl
corvette and f body maf calibrations are quite different even though they use the same sensors. this is likely due to plumbing differences and also different afr goals in the upper ranges and gm using it for fine tuning there rather than targeting perfect calibration
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