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Thread: LS1 PCM Controlled Gen 1 SBC, Coil per Cylinder, and Electronic Throttle Control

  1. #1
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    Default LS1 PCM Controlled Gen 1 SBC, Coil per Cylinder, and Electronic Throttle Control

    Yesterday we got our prototype engine running with the following (see video):
    • 12200411 LS1 PCM with a true, coil per cylinder, LS1 calibration
    • LS1 Corvette Electronic Throttle Body "Drive by Wire"
    • 8 LS1 Coils
    • 1989 5.7L TPI long block
    • Ram Jet 350 Intake Manifold Kit
    • Ram Jet 350 Camshaft
    • GM 1.6 Rocker Arms




    About the Vortec (Distributor) System
    The 96-99 Vortec Truck engines and 01-02 Vortec Express Van engines use a 4x crank signal from within the timing cover and a 1x cam signal from within the distributor. All of these engines are equipped with the necessary sensors and hardware to use the 12200411 PCM with the 01-02 Express Van calibration. This offers the use of cable throttle only. The PCM can be loaded with either a 4L60E or 4L80E calibration.

    About the LS1 (Distributor-less) System
    The LS style engines use a 24x crank signal from within the block. The crank reluctor is pressed on the crankshaft and a sensor is mounted in the side of the block to pick up the signal. The 1x cam signal is generated from a sensor dropped in the top/rear of the engine. This system offers use the use of a 4L60E, 4L80E, and Skip Shift and Reverse Lockout for the T56. Neither the crank or cam components are swappable on the early small block engines as they're LS style specific. The engine pictured is receiving a 24x crank signal from within the timing cover and a 1x cam signal from a Vortec distributor. A custom harness was built to work with the system. A 2002 Corvette LS1/T56 calibration was loaded into the PCM. Basically, the PCM thinks this engine is an LS1 with electronic throttle.

    Availability of Components
    This engine is the result of a lot of research and development. Some of the pieces that went into making this possible are prototype, "one-off", pieces. This engine is planned for a 1991 Trans Am Convertible project. Any bugs will be identified and get worked out. As the engine sits it is equipped with the first prototype pieces. Knock sensors will move to the sides of the block, coil brackets will be revised, air filter will change, etc.
    24x LS1 PCM on Early Small-Block Chevy and LT1/LT4
    http://www.eficonnection.com

  2. #2
    Lifetime Member ChipsByAl's Avatar
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    Very Cool!
    I would think your custom 24x wheel could work on an LT1 as well. If so, perhaps the opti-crap could be adapted similar to your vortec distributor to produce the 1x signal.
    Al
    "Trash that carb and get Injected!"

  3. #3
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    Quote Originally Posted by ChipsByAl View Post
    Very Cool!
    I would think your custom 24x wheel could work on an LT1 as well. If so, perhaps the opti-crap could be adapted similar to your vortec distributor to produce the 1x signal.
    Al
    My thoughts exactly. One step at a time.
    24x LS1 PCM on Early Small-Block Chevy and LT1/LT4
    http://www.eficonnection.com

  4. #4
    Joe (Moderator) joecar's Avatar
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    S10W,
    Very nice work... cool...

    Did you fab your own external crank reluctor wheel (do you have pics of it) or did you get it from where...?

    Cheers
    Joe

  5. #5
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    The ring is inside the timing cover. It's a modified big block ring to fit the small block crank. No pics yet.
    24x LS1 PCM on Early Small-Block Chevy and LT1/LT4
    http://www.eficonnection.com

  6. #6
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    Great work S10!
    Ron

  7. #7
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    That is pretty damn cool. Nice work.
    01 C5 'vert A4
    EFILive, PLX, & TNT are all we got at the moment.

  8. #8
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    now that is cool

    Ryan

  9. #9
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    Here's where all this started if you guys are really interested.
    Some really good info in all those pages.
    http://www.thirdgen.org/techboard/tp...-opinions.html

  10. #10
    Lifetime Member Aloicious's Avatar
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    NICE! I'd love to get my L31 modified for a distributorless system. keep us updated on how it works and everything.
    1996 c1500 gen1e 5.7L - the "LS31", 24x CNP, LS2 coils, modified T56, 12200411PCM running COS3, zz4 cam, custom MPFI, etc. coming soon: Twin Turbos

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