Running a Northstar on a LS1 PCM. - Page 13
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Cadillac Powertrain Control Module (PCM) Tuning Discussion, Running a Northstar on a LS1 PCM. in Cadillac Engine Technical Discussion; Originally Posted by wait4me simtec sounds kinda fun.. Yeah im just finally getting some free time to start checking out ...
  1. #181
    AJxtcman's Avatar
    AJxtcman is offline Cadillac Owners Connoisseur
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    Re: Running a Northstar on a LS1 PCM.

    Quote Originally Posted by wait4me View Post
    simtec sounds kinda fun..

    Yeah im just finally getting some free time to start checking out other cool forums. This one is pretty good.


    An explination of what i meant by using someones code is, with a hex editor, go to location 6310A in your file. IF you have a RAW bin pulled from the ecm, goto location 7Ed0a.

    The gm osid is not a gm id released to i dont think. That is why i never put it in for the efilive guys to use.
    I have seen that EFILive stuff
    VIN 12345678XL000055
    Engine ____________ N/A
    Transmission _______ N/A
    PCM flash _________ 512Kb
    Operating System __ 0936114X
    Calibration _______ 2147483647
    OS ID ___________ AL
    Cal ID
    BCC ____________ CYCB
    OS Level
    Cal Level
    Cal file name _____ 0936114X.cal
    Cal file version ____ N/A
    Cal file date ______ N/A
    Operating System _______ 0936114X _ $6790
    Engine Calibration _______ 9360697___ $8EE1
    Engine Diagnostics ______ _9390351 ___ $6091
    Transmission Calibration ___ 9360702 ___ $A77C
    Transmission Diagnostics __ 9360704 ___ $B61B
    Fuel System _____________ 9360705 ___ $ACAA
    System__________________ 9386828 ___ $82F4
    Speedometer ____________ 9360708 ___ $A6F5

  2. #182
    AJxtcman's Avatar
    AJxtcman is offline Cadillac Owners Connoisseur
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    Re: Running a Northstar on a LS1 PCM.

    Well I got the riped out spindle arm mount on the frame fixed on my truck and put the new PCM in and it does seem to be a good bit faster. Its sounds a little different and seems to have more torque all through the power range.
    I have a 2800 stall converter coming within a week or so. I hope that is going to help me come off the line a little better. Im hoping by the time I come off the line the turbo will be spooled up and I can feather foot it if it wants to spin. Right now it has a hesitation and lag or bog comming from a dead stand still . Its not noticable at all just driving normal. When I try to bring it off the line it bogs pretty bad and then when it gets to about 20 or 30mph the turbo spools up and it starts to spin the tires, even though its spinning its still pulling pretty hard. Sometimes the truck will want to torque off to the left. This thing has an awsome amount of torque with the turbo. Its unbelievable!!!! I cranked the boost up to 9lbs with my new home built boost controler. I wonder how much boost this stock engine will take before I start scattering parts?
    I beleive the truck will be in the middle elevens at the drag strip. We marked of a 1/4 mile in front of the shop (1320 ft) and with a stop watch it was well below 12seconds several times. This was with the old PCM so Im sure the one you just wrote will be even faster especially if I can get the lag out.
    Lookin good

  3. #183
    mazda1949 is offline Cadillac Owners Member
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    Talking Re: Running a Northstar on a LS1 PCM.

    Hey guys , I got my 2800 stall torque converter today. I'm hoping to get it in the truck sometime by the middle of the week. I would try to do it tomorrow but I've got to go to Atlanta and see my two grandboys this weekend. A couple of weeks ago I had to go to my oldest grandsons daycare to pick him up, this is the 5yr old and he looked up at his teacher and said, Miss Janie this is my Popa and he's got a hotrod truck!!!!!!! I beleive he's gonna be a chip off the old block. He likes Popa's truck!!!!
    Guys , for a stock Northstar engine with a turbo I've never set my butt down in anything this fast. Old AJ has got his stuff together on this one. He's been awful nice to work with me on my little project so far. If any of you are thinking of going with the LS1 ECM tune AJ is the man that can get you to laying some rubber down. Their is no comparison to the first tune I had on my LS1 PCM that was done by someone else. AJ's tune is awsome!!!!!!!!!!!!!
    I turned 60yrs old last weekend and when I sit down in my little Mazda rear engine pickup I feel like Im in my
    20's again. This is the most fun I've had since I used to drive Late model (round D round) dirt cars. I think Im going through my second childhood.
    Well boys I gotta go for now . Me or AJ will keep you posted on what happens next.

    Steve (aka mazda1949)

  4. #184
    mazda1949 is offline Cadillac Owners Member
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    Re: Running a Northstar on a LS1 PCM.

    Here is a video of my truck.

  5. #185
    mazda1949 is offline Cadillac Owners Member
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    Re: Running a Northstar on a LS1 PCM.


  6. #186
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    Re: Running a Northstar on a LS1 PCM.


  7. #187
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    Re: Running a Northstar on a LS1 PCM.

    Hey recheck that Fuel Pressure.
    With the ignition ON, and engine OFF (zero vacuum), system fuel pressure at the pressure test connection should be 333-376 kPa (48-55 psi).

    Start the engine. You should have a (3-10 psi) drop

    Say your target is 55 psi WOT. Then you want about 50 psi running.

    If that doesn't take care of the black smoke and the flutter drop the pressure to 50 psi WOT or 0" vacuum. This may take you down to about 45 psi running. Recheck to see if that gets rid of the flutter/black smoke/lag.

  8. #188
    AJxtcman's Avatar
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    Re: Running a Northstar on a LS1 PCM.

    [YOUTUBE]ZX7mEQPQfkY[/YOUTUBE]

  9. #189
    mazda1949 is offline Cadillac Owners Member
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    Re: Running a Northstar on a LS1 PCM.

    Thanks AJ for embeding that video for me . I've got to figure out how to do that. I must be missing something but I'll figure it out sooner or later.

    Old truck sounds pretty good doesn't it? Not only does it sound good it is fast as H#%*$L to.
    I'll try the fuel pressure stuff and see if that helps .

    Steve

  10. #190
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    Re: Running a Northstar on a LS1 PCM.

    Quote Originally Posted by mazda1949 View Post
    Thanks AJ for embeding that video for me . I've got to figure out how to do that. I must be missing something but I'll figure it out sooner or later.

    Old truck sounds pretty good doesn't it? Not only does it sound good it is fast as H#%* to.
    I'll try the fuel pressure stuff and see if that helps .

    Steve
    Nice video. Keep up the good work.

  11. #191
    AJxtcman's Avatar
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    Re: Running a Northstar on a LS1 PCM.

    Quote Originally Posted by mazda1949 View Post
    Thanks AJ for embeding that video for me . I've got to figure out how to do that. I must be missing something but I'll figure it out sooner or later.

    Old truck sounds pretty good doesn't it? Not only does it sound good it is fast as H#%* to.
    I'll try the fuel pressure stuff and see if that helps .

    Steve
    Any time you want to learn something like that. Hit Quote and it will show you what I did.

    I only inserted the vid #

  12. #192
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    Re: Running a Northstar on a LS1 PCM.

    How am I just now noticing this thread?

    Awesome work by AJ, and awesome truck!!
    Rest in Peace, J.D. (aka Dirt_Cheap_Fleetwood)

  13. #193
    cbulen is offline Cadillac Owners Member
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    Re: Running a Northstar on a LS1 PCM.

    AJxtcman,

    I attempted to PM you, but as I am too new of a member to this forum, I cannot sent PM's yet. Would you contact me, or provide your contact info, as I would like to talk to you about buying one of your LS1 PCM solutions and wiring harness for my 1996 Northstar. I am using a Manual transaxle, so no tranny management is needed in my case. Basically, I need a stand-alone ECM solution. I am considering the CHRFab Holley system, but I would like to look into the LS1 solution you have, first.

    Chris

    cbulen at sbcglobal dot net

  14. #194
    AJxtcman's Avatar
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    Re: Running a Northstar on a LS1 PCM.


  15. #195
    Starfire88 is offline Cadillac Owners Member
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    Re: Running a Northstar on a LS1 PCM.

    For 100% clarity which transmission are you able to run with the LS1 PCM?

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