Announcement

Collapse
No announcement yet.

Finished! Have the new MAF calibration table to use all 85mm MAF's on LT1's!!!!

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Finished! Have the new MAF calibration table to use all 85mm MAF's on LT1's!!!!

    I have a table generated, and the math along with a spreadsheet and graph to show my findings, Applying my converted table will allow an LT1 along with the 5 to 3 pigtail adapter take use of the ZO6/truck stock MAF with screen with very accurate metering. I have my table within about .3 gps all the way through, very accurate at the lower end, but the higher end should put the blms at a good spot throughout the range.

    I know the screen capture cuts off the values, but the color coding is as follows;

    The RED is what the stock 1995 LT1 PCM uses to translate,
    The BLACK dotted line is what the Delphi 85mm MAF calibration table is on every car that uses it, but it's useless to us LT1'ers since our systems work off of 128 bit parsing while the LS guys have a 125 based system.
    The ORANGE is the correction for the LTx PCM to use without a translator.

    ANYWAYS

    the point is, all you guys worried about flow problems or something, the 85mm is a great way to do it (the 100mm is also out there someplace).
    Using the table I wrote up will lock in your blms as close as possible.

    PM me for the table or if you want me to mod your bin for you.

    Cheers
    -Al
    Attached Files
    -Alex
    1995 LT1 ECU (GREAT for flashing!)
    ZO6 wheels (clones)
    LED exterior and interior lighting
    With questionable guts:
    Forged bottom end
    free flowing 3 1/2" exhaust w/
    pacesetter longtubes
    T56 with a 6 puck ceramic copper heavy duty clutch
    Built T56, 3.5" 4130 driveshaft w/spicer HD's
    K&N RAM air from 96 ws6
    96? ws6 hood
    96? ws6 spoiler
    full emissions delete
    polished heads with oversize valve job
    Edelbrock IAS shocks
    Full tubular Chassis minus k member
    Daily Driver and love it that way
    Motor is not what you'd think.

  • #2
    I also have the excel worksheet for anyone to veiw and modify if you would like to check my work

    EDIT: X axis on graph is Hz, Y is Grams per second.
    -Alex
    1995 LT1 ECU (GREAT for flashing!)
    ZO6 wheels (clones)
    LED exterior and interior lighting
    With questionable guts:
    Forged bottom end
    free flowing 3 1/2" exhaust w/
    pacesetter longtubes
    T56 with a 6 puck ceramic copper heavy duty clutch
    Built T56, 3.5" 4130 driveshaft w/spicer HD's
    K&N RAM air from 96 ws6
    96? ws6 hood
    96? ws6 spoiler
    full emissions delete
    polished heads with oversize valve job
    Edelbrock IAS shocks
    Full tubular Chassis minus k member
    Daily Driver and love it that way
    Motor is not what you'd think.

    Comment


    • #3
      Just tested it with the Delphi 85mm that does not have the screen from factory, works just as well.
      -Alex
      1995 LT1 ECU (GREAT for flashing!)
      ZO6 wheels (clones)
      LED exterior and interior lighting
      With questionable guts:
      Forged bottom end
      free flowing 3 1/2" exhaust w/
      pacesetter longtubes
      T56 with a 6 puck ceramic copper heavy duty clutch
      Built T56, 3.5" 4130 driveshaft w/spicer HD's
      K&N RAM air from 96 ws6
      96? ws6 hood
      96? ws6 spoiler
      full emissions delete
      polished heads with oversize valve job
      Edelbrock IAS shocks
      Full tubular Chassis minus k member
      Daily Driver and love it that way
      Motor is not what you'd think.

      Comment


      • #4
        Here's the values, you can try these with the newer GM maf's and see how the work out if your having rich BLMs ( <128)
        Attached Files
        -Alex
        1995 LT1 ECU (GREAT for flashing!)
        ZO6 wheels (clones)
        LED exterior and interior lighting
        With questionable guts:
        Forged bottom end
        free flowing 3 1/2" exhaust w/
        pacesetter longtubes
        T56 with a 6 puck ceramic copper heavy duty clutch
        Built T56, 3.5" 4130 driveshaft w/spicer HD's
        K&N RAM air from 96 ws6
        96? ws6 hood
        96? ws6 spoiler
        full emissions delete
        polished heads with oversize valve job
        Edelbrock IAS shocks
        Full tubular Chassis minus k member
        Daily Driver and love it that way
        Motor is not what you'd think.

        Comment


        • #5
          The calibration of the MAF sensor is also a function of the path of the air leading to and from the sensor. How do you account for that? A system like the WS6, with a straight shot into and out of the MAF sensor will have a different calibration than the stadard system with a 90-degree bend after the MAF, and the irregular shaped duct leading into the MAF. The screen is there to minimize that effect, but it still matters.
          Fred

          381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motor

          Comment


          • #6
            To my knowledge I based my corrections off of my f car with ram air. After working on a tune, I was able to hit blms mostly at about 126-128 throughout rpm and load range . My guess is that I'd be getting blms >128 if I worked off of a standard intake program instead of a WS6 table with this setup. Also, these are calculated values, not guess and check. If you view the graph, you'll notice the calculated curve is slightly off of the Delphi 125 scale curve in certain areas. I did ask a buddy of mine who took forever to get back to me who used to work with me at chevy (he's a tech now) he did mention something similar to this about the 125 table i used to scale the 128 table. The scale was supposedly from a 2003-2007 GM truck (avalanche, suburban etc), which I believe would compensate for not having a straight through short distance plenum. I am confident with my numbers; they do correlate to the quadratic function of the original numbers from the 96 f car system at a scale. There is a possibility I am wrong, but so far, the BLM's are pointing to good results. I did swap it back into a 95 ss with the ram air and bone stock tune, completely untouched BIN (until I came along), read out the exact same BLM's as his well kept stock sensor at every rpm. I downloaded his tune, backed it up, changed the MAF tables, uploaded the new bin. How much consideration should be put into the velocity regulation of the bend? I know this works very well with my system and at least one stock 95 with ram air.

            Fred; I could send you my excel worksheet so that you can check it out if you want.
            -Alex
            1995 LT1 ECU (GREAT for flashing!)
            ZO6 wheels (clones)
            LED exterior and interior lighting
            With questionable guts:
            Forged bottom end
            free flowing 3 1/2" exhaust w/
            pacesetter longtubes
            T56 with a 6 puck ceramic copper heavy duty clutch
            Built T56, 3.5" 4130 driveshaft w/spicer HD's
            K&N RAM air from 96 ws6
            96? ws6 hood
            96? ws6 spoiler
            full emissions delete
            polished heads with oversize valve job
            Edelbrock IAS shocks
            Full tubular Chassis minus k member
            Daily Driver and love it that way
            Motor is not what you'd think.

            Comment

            Working...
            X