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Type: Posts; User: dave w

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    The injector parameters $42 vs. $31 is not a...

    The injector parameters $42 vs. $31 is not a direct crossover. Maybe the early 93 $31 7.4 liter injector parameters will get you close enough to tune, just use the 5235231 injector flow in the $31...
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    The link below has .bin file AFTK which should...

    The link below has .bin file AFTK which should have the 5235231 Injector Offsets. The link below also has the TunerPro $42 .xdf definition for the AFTK .bin file.
    ...
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    Adding .zip Excel file. dave w

    Adding .zip Excel file.

    dave w
  4. In the link listed below shows a factory TH400...

    In the link listed below shows a factory TH400 Kickdown switch. The kickdown switch can be wired through a 5 pin relay to interrupt TCC power at WOT.
    ...
  5. Bluecat Transmission Table Software could be...

    Bluecat Transmission Table Software could be helpful with TCC Tuning: https://forum.hptuners.com/showthread.php?44953-Bluecat-Transmission-Table-Software

    dave w
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    Some early TBI 454, mostly 1987, did not use...

    Some early TBI 454, mostly 1987, did not use Knock Sensors.

    The wiring schematics for the 1993 - 95 454 / 4l80E show Knock Sensor wiring. Note: 1993 - 95 TBI 454's have the Knock Sensor module...
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    I watched the transmission video posted above. ...

    I watched the transmission video posted above. Awesome information on the mechanical differences of the 4L80E. :thumbsup:

    I'm wondering what internal electrical / electronic differences there...
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    I like the option of re-pinning the 91 TBI...

    I like the option of re-pinning the 91 TBI computer connectors so you can use a 95 454 computer. Here is a link to how I did the conversion:...
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    According to Michelle's Manuals schematics, the...

    According to Michelle's Manuals schematics, the 2002 Express Van with the L31 uses One Knock Sensor, with OS '156 Flash.

    Thoughts about the Pro's / Con's for importing the '02 Express Van KNK...
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    I custom build new 454 TBI Harnesses for the...

    I custom build new 454 TBI Harnesses for the 16197427 second generation TBI computer (Vehicle Speed Sensor wiring included). The 16197427 TBI computer speed is rated at 8192 Baud Rate, the first...
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    What Knock Sensor '0411 LT1

    I'm helping out with rewiring a 1994 LT1 for an '0411 PCM PCM conversion.

    I'm wondering what Knock Sensor to use on the LT1?

    dave w
  12. :welcome: Link to gearhead-efi LT1...

    :welcome:

    Link to gearhead-efi LT1 information: http://www.gearhead-efi.com/Fuel-Injection/showthread.php?335-16188051-and-16181333-PCM-Information-EE-EEB

    dave w
  13. This gearhead-efi link: ...

    This gearhead-efi link: http://www.gearhead-efi.com/Fuel-Injection/showthread.php?303-16197427-PCM-Information-0D has only one 5.0 liter $OD .bin file BHMD.

    This gearhead-efi link: ...
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    The Injector Offset Tables are parameters that...

    The Injector Offset Tables are parameters that are important for tuning.

    The screen shot below shows injector offset tables from 94 Pickup with a 4.3 $OD and a 94 Pickup with a 7.4 $OE. There is...
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    The Injector Flow parameter is one of the most...

    The Injector Flow parameter is one of the most import parameters to determine in the tuning process.

    What an injector is rated to flow vs. what an injector is actually flowing vs. the injector...
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    $OD is for the 4L60E, $OE is for the 4L80E The...

    $OD is for the 4L60E, $OE is for the 4L80E

    The factory did not use the 4L60E with the 7.4 liter.

    Using two instances of TunerPro (side by side) is required to compare a $OD .bin file vs. $OE...
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    Attached is the PE Active AFR's for a 16197427...

    Attached is the PE Active AFR's for a 16197427 Daily Driver.

    It would be awesome to compare AFR's screen shots from other tuner members. I think posts with data are the most helpful for everyone...
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    The link to gearhead-efi TBI injector flow rates:...

    The link to gearhead-efi TBI injector flow rates: http://www.gearhead-efi.com/Fuel-Injection/showthread.php?81-GM-TBI-Injector-size-color-and-part-numbers

    17104288 - Pink / Purple - 46pph @13psi...
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    I tune a daily driver 16197427 with two Oxygen...

    I tune a daily driver 16197427 with two Oxygen Sensors, the factory O2 sensor and the WBO2. I do not use simulated NBO2 data.

    I tune a daily driver 16197427 with factory default AFR fuel ratios....
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    Attached are more spreadsheet screen shots from...

    Attached are more spreadsheet screen shots from the same combined data logs previously posted.

    Injector Duty Cycle should increase with engine load / engine rpm.

    BLM's and WBO2 data are not...
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    Based on the information in this link:...

    Based on the information in this link: http://www.gearhead-efi.com/Fuel-Injection/showthread.php?81-GM-TBI-Injector-size-color-and-part-numbers ... the 17084327 injector has a factory rated flow of...
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    I tune with closed loop for 16197427 daily...

    I tune with closed loop for 16197427 daily drivers. The attached screen shots show closed loop WBO2 tuning data that has multiple data logs combined, using the same .bin file. The combined total of...
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    I tried using my WBO2 spreadsheet for the...

    I tried using my WBO2 spreadsheet for the newplugs-run.xdl file posted above.

    Most of the data was open loop, so the spreadsheet was not helpful.

    dave w
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    There are two connector plugs to the TBI Coil: ...

    There are two connector plugs to the TBI Coil:

    Usually one of the TBI coil connectors is a 12 AWG pink wire with a 16 AWG white wire. The 12 AWG pink wire needs 20 amp power from the ignition...
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    Timing tables can be challenging. Most of the...

    Timing tables can be challenging. Most of the time, I start tuning with a factory timing table, like the Vortec L31 table I posted a link to and tune from there. Once the stock timing table has...
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