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Thread: LT1 Information

  1. #1
    Join Date
    Aug 2004
    Location
    Oshawa ON
    Posts
    58
    Country Flag: Canada

    LT1 Information

    I have been bitten by the pro-touring bug. I sold my old carburated 350 and bought a 96 LT1 with a 4L60E.

    I now need to find a complete schematic for the set-up. I need to set up the ignition as well as figure out something to do for a speedo.



    If anyone has info it would be greatly appreciated.


  2. #2
    Join Date
    Aug 2004
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    583

  3. #3
    Join Date
    Nov 2001
    Location
    St. Cloud, MN
    Posts
    376
    Country Flag: United States
    The 95 & 96 are different, ODB1 and ODB2. I would recommend you get the manuals for a 96.

    I would suggest getting an aftermarket harness. I used a Painless harness and it worked GREAT!
    Jon
    71 Nova LT1/4L60E

  4. #4
    Join Date
    Aug 2004
    Location
    Oshawa ON
    Posts
    58
    Country Flag: Canada
    I think I have the wireing part figured out. I bought a Haynes manual. It has a good schematic in it. Being an electrician I just cant bring myself to paying that much money for a wiring harness, when I have most of it already.

    What do I do with the pollution control systems on the motor? Do I keep them and be green friendly, or will I gain much HP by removing it? How much can I remove of it without getting trouble codes?

  5. #5
    Join Date
    Nov 2001
    Location
    St. Cloud, MN
    Posts
    376
    Country Flag: United States
    If you get a program like LT1 Edit or TunerCat (i have) you can eliminate the lights from emissions things. Yours probably has 4 o2 sensors and I am pretty sure you can delete the rear two with programing. I am not sure if TC works with OBD2. You can also correct for tire/gear changes.

    Obvliously you will not want to remove any smog stuff if it is required where you live. You will not gain much power. I do not have any smog stuff. Air pump, egr, etc.

    I would recommend the programming message board over at cz28.com.
    Jon
    71 Nova LT1/4L60E

  6. #6
    Join Date
    Nov 2004
    Posts
    37
    You can run your motor on an OBD-1 unit. In fact OBD-1 is more user friendly and performance tuneable than OBD-2. There are a lot of people that convert '96 LT-1's to OBD-1 on the ImpalaSS forum. I would suggest calling or emailing Bryan Herter at www.pcmforless.com and he can help you with all the information you'll need to do it, as well as re-program the brain and delete whatever you don't want. Such as the VAT system, top end limiter, etc... , etc..

  7. #7
    Join Date
    Aug 2004
    Location
    Oshawa ON
    Posts
    58
    Country Flag: Canada
    I have most of it complete now. I found out that the VATS needed to removed from the PCM. When I had the computer flashed I had the polution controls removed, some more performance into it, and the fans to turn on at a lower temp.

    The harness has not been to bad to modify.I removed all the polution stuff as well the a/c.

    I am trying to fit the computer under my dash but it is tight.