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Cadillac Powertrain Control Module (PCM) Tuning Discussion, Running a Northstar on a LS1 PCM. in Cadillac Engine Technical Discussion; This is a nice car. You may wonder why I spent so much time on this. I was not selling ...
  1. #91
    AJxtcman's Avatar
    AJxtcman is offline Cadillac Owners Connoisseur
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    Re: Running a Northstar on a LS1 PCM.

    This is a nice car.

    You may wonder why I spent so much time on this.
    • I was not selling enough Tuned PCM to the Caddy guy's
    • I was trying to look at the fuel and spark tables to turn my car up a notch.
    • I need to make some cash to support my tuning efforts.
    • The Northstar's in sand rails, street rods, Fiero's needed something better than the current sources of aftermarket PCM's. I worked on a $25K sand rail with a Northstar. Those guy's have $$ to spend.
    • The list goes on.

    I have not removed my Caddy computer yet, it looks like I can set the LS1 up for an auto. It is all in place just set to manual trans.

    Mark my word the was the 1 biggest step to getting a program built to program Northstar PCM's the correct way. Not screwing around and screwing up PCM's with GM's program.
















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    Source:www.wreckedexotics.com

  2. #92
    AJxtcman's Avatar
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    Re: Running a Northstar on a LS1 PCM.

    The stock 4.0L made 250 hp
    Shelby claimed 320hp with the VIN 9 cams and the LS1 PCM.
    Shelby claimed 370hp with a blower and a "dirty tune" (X-50 package)
    In 2001 a customer placed his Shelby Series 1 on a chassis dyno and found it delivered 270hp at the rear wheels.
    The numbers on the certificate accompanying the engine package promised 370hp. The normal loss on a manual trans drivetrain is about 10 to 15%. this would put the car at 320 rear wheel horse power.

  3. #93
    flyinlow is offline Cadillac Owners Member
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    Re: Running a Northstar on a LS1 PCM.

    Hi I just found this thread through google and am very interested in your progress on this project.
    I am building an Open Road Race unlimited class car. I will be building a twin turbo northstar hooked to a porsche 930 trans with the ring gear flipped to run mid engine so no tranny control would be needed .
    I will be using C4 Vette hubs and spindles so I can use an abs sensor for VSS input to the pcm.
    I was planning to use a megasquirt system but would rather have the reliability of a factory system if possible.
    Are you planing to sell the program when you are done?? and will it work on a 96 northstar engine?
    I was also born and raised in SW washington and a dealer tech since 1984.
    Here is a pic of the type car I am building



    and the rear suspension I will be building for it



    I am shooting for a 240 mph top speed (and can actually do it legally in Nevadas Open Road Racing)

    Kevin, Owner
    Adrenaline Junky Motorsports

  4. #94
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    Re: Running a Northstar on a LS1 PCM.

    Quote Originally Posted by flyinlow View Post
    Are you planing to sell the program when you are done?? and will it work on a 96 northstar engine?
    I was also born and raised in SW washington and a dealer tech since 1984.
    Here is a pic of the type car I am building



    Kevin, Owner
    Adrenaline Junky Motorsports
    Yes it is for sale and yes it is for a 96 to 99 Northstar Manual Trans

    What street is the picture above taken or the city?
    SW Washington correct.

    I will update my signature

  5. #95
    AJxtcman's Avatar
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    Re: Running a Northstar on a LS1 PCM.

    Quote Originally Posted by AJxtcman View Post

    Mark my word the was the 1 biggest step to getting a program built to program Northstar PCM's the correct way. Not screwing around and screwing up PCM's with GM's program.
    This Program has change the way I can work with Northstar PCM's.

    If I pull in some customers that have Northstars in non Cadillac's I can effort to spend money on the Cadillac Northstar PCM projects.

    If we or I can raise the outlook on the Northstar by allowing for a GOOD tunable PCM that will run correctly you will see them in more hot rods. Yes 2006+ have been tuned for a few years.

    This will raise the prestige of the Northstar, raise the value of a Cadillac, and may lead to people developing fixes for know issues.
    Examples: Norm's Head-bolt Inserts, TimeSert Big Inserts.

    Someone that is an engineer or machinist may have a project in his garage (33 Chevy or a 39 Cadillac Sixty Special or even a 1957 Eldorado Biarritz) and wants to update the chassis and drivetrain. This guy looks at a problem as a problem solver. He may design a new head gasket or intake manifold.

    Corvette Guy's are installing modern Chassis and Drivtrains under older C2 and C3 cars

    Fiero Guy are goofy. I am not a big fan of the car, but the guy's on the Fiero site build and design very nice stuff

    Example: Russ544 has put together a Multi (8) throttle body Northstar!

    [YOUTUBE]nhoAR3UfLRo[/YOUTUBE]








    and the bad news




    Lots of talent on other forums also

  6. #96
    flyinlow is offline Cadillac Owners Member
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    Re: Running a Northstar on a LS1 PCM.

    Quote Originally Posted by AJxtcman View Post
    Yes it is for sale and yes it is for a 96 to 99 Northstar Manual Trans

    What street is the picture above taken or the city?
    SW Washington correct.

    I will update my signature
    That pic. is in upstate New York. it is not my car but the same model that I am building
    I see you were from Washougal, I lived just west (upwind fortunately) from Camas for a while

    I will Pm you as I am definately interested in the PCM

  7. #97
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    Re: Running a Northstar on a LS1 PCM.

    Quote Originally Posted by AJxtcman View Post
    I could set it up to run on a stock STS, but it would be like how mark has his in his STS turbo. You would set DTC's like he does, but if you wait a short time I will be able to use nice tuning software on your PCM.
    Yes I said a short time.
    Mark99 has claimed it so dont shoot the messenger
    but the reason why we revel at his STS so much (i mean more so then for simply the reason its turboed) is that his OBD-1 PCM is spidered into the stock harness and programming so well it DOES NOT throw any codes...

  8. #98
    flyinlow is offline Cadillac Owners Member
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    Re: Running a Northstar on a LS1 PCM.

    I assume that the PCM will still be tuneable with normal LS1 tuners since I will be twin turbocharging it and building it for Open Road Racing, so I will need to dyno tune it when done
    Plus of course eliminate all emissions sensors, rear O2 sensors and Vats.

  9. #99
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    Re: Running a Northstar on a LS1 PCM.

    Quote Originally Posted by flyinlow View Post
    I assume that the PCM will still be tuneable with normal LS1 tuners since I will be twin turbocharging it and building it for Open Road Racing, so I will need to dyno tune it when done
    Plus of course eliminate all emissions sensors, rear O2 sensors and Vats.
    Yes you should have a Dyno, but I think you can run this without a dyno tune. I think a dyno tune may give you 100 to 200 more horse power

  10. #100
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    Re: Running a Northstar on a LS1 PCM.

    Quote Originally Posted by CadillacSTS2003 View Post
    Mark99 has claimed it so dont shoot the messenger
    but the reason why we revel at his STS so much (i mean more so then for simply the reason its turboed) is that his OBD-1 PCM is spidered into the stock harness and programming so well it DOES NOT throw any codes...
    Hmmmmmmmmm I see that you have not kepted in touch with Mark.
    He is running a CHRFab holley engine management setup and a PCS Trans conrtoller.
    He has more warning messages and warning light on then I can list or remember.

    Just ask him. How did you come up with no codes being set?

  11. #101
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    Re: Running a Northstar on a LS1 PCM.

    no worries man i believe you
    before he ran the holley, with the stock injector set up he didnt have any warning issues at least i could of sworn he didnt
    i didnt realize he switched to a different fuel management set up now

  12. #102
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    Re: Running a Northstar on a LS1 PCM.

    Maybe I chatted about this in a PM or on another forum, but I thought he posted it in the Seville section here

  13. #103
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    Re: Running a Northstar on a LS1 PCM.

    egh i could of missed it
    way too many posts here to even begin to remember lol

  14. #104
    flyinlow is offline Cadillac Owners Member
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    Re: Running a Northstar on a LS1 PCM.

    Quote Originally Posted by AJxtcman View Post
    Yes you should have a Dyno, but I think you can run this without a dyno tune. I think a dyno tune may give you 100 to 200 more horse power
    If you can PM me your phone # I will give you a call
    I dont have quite enough posts to pm you yet

  15. #105
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    Re: Running a Northstar on a LS1 PCM.

    Lyndon sent me a PCM and cable today. I don't need any more PCM's, but he set this one up. OMFG does it have some power. More grunt, but less RPM's per second at WOT

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