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Northstar Engines and System Technical Discussion Discussion, Any Previously tuned 2000 to 2003 PCM have lifetime tune upgrade in Cadillac Engine Technical Discussion; I have NEVER posted or even speculated that a FWD 2000 - 2004 Northstar engine could not benefit from a ...
  1. #61
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
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    Re: Any Previously tuned 2000 to 2003 PCM have lifetime tune upgrade

    I have NEVER posted or even speculated that a FWD 2000 - 2004 Northstar engine could not benefit from a good PCM "tune". (My own experience with the STS says it would benefit from a few tweaks). I HAVE questioned anyone's ability to date to perform such a "tune". All of the accompanying gobbledygook on OBD-1, 128 mb, blah, blah is merely more smoke and mirrors.

    The title of this thread is the year group in question, not OBD-1 and not '96 - '99.

  2. #62
    codewize's Avatar
    codewize is offline Cadillac Owners Master
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    Re: Any Previously tuned 2000 to 2003 PCM have lifetime tune upgrade

    I'm just chilling out waiting to go faster. Lots of time, lots of cash, lost of trips to the track, no progress.

    I will say however my car looks damn good
    Ownership:
    91 Brougham d'Elegance 350
    02 Deville DTS
    01 Deville DTS:
    Custom installed Volant CAI
    Custom PCM
    Body color engine components
    Cruiser Alloy wheels
    EBC brakes and rotors
    Eibach springs
    Corsa exhaust
    Sportwing Spoiler
    Semi-custom interior
    Custom quad Hi-Beams
    Future Plans: More interior work.


    Memberships:
    National and regional Cadillac & LaSalle Club
    Proud Volunteer - Northstar Tuning Project
    Guinness World Records - Largest Cadillac Parade

    ----------------------------

  3. #63
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    Re: Any Previously tuned 2000 to 2003 PCM have lifetime tune upgrade

    Working on it Code. I just have too much going on.

  4. #64
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    Re: Any Previously tuned 2000 to 2003 PCM have lifetime tune upgrade

    I was able to post something in less than 30 seconds

  5. #65
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    Re: Any Previously tuned 2000 to 2003 PCM have lifetime tune upgrade

    Picture day today

    Edwin will have the first one out and we will see if he is happy. Then Code will get his.

    I still have my hair, but it was a stressful few weeks

  6. #66
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    Re: Any Previously tuned 2000 to 2003 PCM have lifetime tune upgrade

    OK sub
    This is what a 2005 Chevy Truck High Octane Table looks like. The reason I am posting it is for the reference to RPM, Cylider Volume, and spark timing in °


    This is a timing table that was in Edwin's OE calibration


    This is Edwin's new timing table I placed in Edwin's OE calibration

  7. #67
    codewize's Avatar
    codewize is offline Cadillac Owners Master
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    Re: Any Previously tuned 2000 to 2003 PCM have lifetime tune upgrade

    AJ, the best thing you could do for me right now is a new button with a longer wire and a micro toggle rather than a momentary contact push button.
    Ownership:
    91 Brougham d'Elegance 350
    02 Deville DTS
    01 Deville DTS:
    Custom installed Volant CAI
    Custom PCM
    Body color engine components
    Cruiser Alloy wheels
    EBC brakes and rotors
    Eibach springs
    Corsa exhaust
    Sportwing Spoiler
    Semi-custom interior
    Custom quad Hi-Beams
    Future Plans: More interior work.


    Memberships:
    National and regional Cadillac & LaSalle Club
    Proud Volunteer - Northstar Tuning Project
    Guinness World Records - Largest Cadillac Parade

    ----------------------------

  8. #68
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    Re: Any Previously tuned 2000 to 2003 PCM have lifetime tune upgrade

    I can send a new switch when I send out the PCM. 2 feet longer?

  9. #69
    codewize's Avatar
    codewize is offline Cadillac Owners Master
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    Re: Any Previously tuned 2000 to 2003 PCM have lifetime tune upgrade

    Quote Originally Posted by pcmcalibrators View Post
    I can send a new switch when I send out the PCM. 2 feet longer?
    At least 2 feet. The old one barely reached to the seatbelt buckle. I'd like to be up into the empty console space so maybe even 3 feet more?

    Drives me nuts. Every time I take the car to the shop, they move the seat back and the switch gets pulled back and under the seat.

    Thanks
    Ownership:
    91 Brougham d'Elegance 350
    02 Deville DTS
    01 Deville DTS:
    Custom installed Volant CAI
    Custom PCM
    Body color engine components
    Cruiser Alloy wheels
    EBC brakes and rotors
    Eibach springs
    Corsa exhaust
    Sportwing Spoiler
    Semi-custom interior
    Custom quad Hi-Beams
    Future Plans: More interior work.


    Memberships:
    National and regional Cadillac & LaSalle Club
    Proud Volunteer - Northstar Tuning Project
    Guinness World Records - Largest Cadillac Parade

    ----------------------------

  10. #70
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
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    Re: Any Previously tuned 2000 to 2003 PCM have lifetime tune upgrade

    Code, Which car did you install the brake switch bypass circuit into ?

    AJ, Code...........Will there be before and after dyno pulls and before and after timeslips (all runs done under the same conditions) ?

    ...........and, has anyone done the four wheel speed sensor bypass modification ??

  11. #71
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    Re: Any Previously tuned 2000 to 2003 PCM have lifetime tune upgrade

    Considering I have repeatedly said that I am working on MPG by increasing HP at cruise speed I can't see how a WOT Dyno pull will show the increase of HP at cruise.

    If Edwin would like to waste his money and find a high dollar dyno that will measure HP and torque at a steady state I am all for it, but I wouldn't waste my money.

    If you look at the spark tables you can see that I have increased the timing at cruise.

  12. #72
    Submariner409's Avatar
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    Re: Any Previously tuned 2000 to 2003 PCM have lifetime tune upgrade

    OK - my misunderstanding. From your post this tuning work is not for performance (overall horsepower/torque gain), it's for highway economy. It will be interesting to see the fuel savings realized.

    It takes the exact same horsepower applied to the road to move a given vehicle at a given steady speed on a flat road surface, regardless of the engine, tune, whatever. If you "increase horsepower at cruise" by advancing timing, then in order to maintain the same cruise speed the throttle blade should not be open as far as before the "tune", resulting in a fuel savings, but that could all be measured dynamically.........and this begs the question: If an economy savings is achievable with a relatively simple cruise ignition timing trim, why didn't Cadillac do it from the start ? Rhetorical question: AJ - why didn't the engineers do it in the first place, especially when, in the late 90's and 2000's every automaker was scratching for CAFE ratings ?

    No way around it: In order to extract more "performance" power from a given engine you need to intake, burn and exhaust more fuel.

  13. #73
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    Re: Any Previously tuned 2000 to 2003 PCM have lifetime tune upgrade

    Quote Originally Posted by submariner409 View Post
    OK - my misunderstanding. From your post this tuning work is not for performance (overall horsepower/torque gain), it's for highway economy. It will be interesting to see the fuel savings realized.

    It takes the exact same horsepower applied to the road to move a given vehicle at a given steady speed on a flat road surface, regardless of the engine, tune, whatever. If you "increase horsepower at cruise" by advancing timing, then in order to maintain the same cruise speed the throttle blade should not be open as far as before the "tune", resulting in a fuel savings, but that could all be measured dynamically.........and this begs the question: If an economy savings is achievable with a relatively simple cruise ignition timing trim, why didn't Cadillac do it from the start ? Rhetorical question: AJ - why didn't the engineers do it in the first place, especially when, in the late 90's and 2000's every automaker was scratching for CAFE ratings ?

    No way around it: In order to extract more "performance" power from a given engine you need to intake, burn and exhaust more fuel.
    Thats funny

    GM take in consideration for bad gas and good gas. Most GM calibrations have a Good Gas aka High Octane spark timing table and a Bad Gas aka Low Octane table. The Northstar has a few Base spark tables and adder tables like other calibrations have also, but the Northstar's others also

    Back to the funny part
    Are all of the Main/Important spark tables the same in all of the 2000 to 2003? NO!
    I can tell you that all of the 275hp Y engines use the exact same main spark tables and all of the 300hp 9's except 1 of the spark tables in 1 special calibration run the exact same tables. So all of the Y's match and all of the 9's match with the exception of the 1. The Y's and the 9's don't match each other

    Well we know the 275hp have more torque below 5000. If I look at the the max amount in both the 9's and the Y's at 1000 to 2000 RPM's at 200 to 400mg/cyl. Then transfer that over to use in a new table and then smooth out the new tables. Then I would say the tune will be safe

  14. #74
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    Re: Any Previously tuned 2000 to 2003 PCM have lifetime tune upgrade

    This goes to the LS1 table I posted


    These are portions of the timing tables for an OE Northstar Calibration. They come from the same calibration and they are not the high and low octane tables


  15. #75
    codewize's Avatar
    codewize is offline Cadillac Owners Master
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    Re: Any Previously tuned 2000 to 2003 PCM have lifetime tune upgrade

    Quote Originally Posted by submariner409 View Post
    Code, Which car did you install the brake switch bypass circuit into ?

    AJ, Code...........Will there be before and after dyno pulls and before and after timeslips (all runs done under the same conditions) ?

    ...........and, has anyone done the four wheel speed sensor bypass modification ??
    This is in the 01. Been installed for a while. It works. I never made it back to the dyno because of the 4 wheel speed thing. I believe I'll still have trouble on the dyno and I don't want to waste my money.

    My runs without using the button are usually .1 to .2 slower. I do get some wheel spin but not enough to loose time. Shes still digging in pretty hard. Without the button the engine just rolls over until it gains traction costing a few tenths.
    Ownership:
    91 Brougham d'Elegance 350
    02 Deville DTS
    01 Deville DTS:
    Custom installed Volant CAI
    Custom PCM
    Body color engine components
    Cruiser Alloy wheels
    EBC brakes and rotors
    Eibach springs
    Corsa exhaust
    Sportwing Spoiler
    Semi-custom interior
    Custom quad Hi-Beams
    Future Plans: More interior work.


    Memberships:
    National and regional Cadillac & LaSalle Club
    Proud Volunteer - Northstar Tuning Project
    Guinness World Records - Largest Cadillac Parade

    ----------------------------

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