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Thread: Os 04073005

  1. #1
    Lifetime Member SS2win's Avatar
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    Default Os 04073005

    I've been collecting CAX files 12587603 and noticed the COS 5 is mentioned in the files but it's not on my machine and I can't find anything else on it. Does it exist by special order or are 12225074 and 12212156 the only ones available?
    2001 Camaro SS #2020
    Stock LS1 w/InconTT | REV Springs | Ti retainers | M6 | McLeod Twin Clutch
    UMI RR K Member | SLP Subframe Connectors | Global West TA | BMR PHB | Metco LCA
    996 Brake Kit| 17" CCW Classics | 17x11 ZR1 Replicas on all four corners

    425@6lbs | ???@12lbs | EFILive Custom OS3 | !MAF | SD
    11.73@12x/1.7 on worn out nittos... yaaawn!

  2. #2
    Forum tyhee Site Admin GMPX's Avatar
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    It does not exist sorry, I'm not sure why there would be a reference to it.
    Need official EFILive help, please go here.
    For tuning support please post your questions on this forum (or other auto forums).
    Sorry if I don't respond to your PM, don't take it personal.


  3. #3
    Lifetime Member SS2win's Avatar
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    I've been searching to see if COS5 and flex fuel are at thing but I only see two OS's supported. Am I missing anything?
    2001 Camaro SS #2020
    Stock LS1 w/InconTT | REV Springs | Ti retainers | M6 | McLeod Twin Clutch
    UMI RR K Member | SLP Subframe Connectors | Global West TA | BMR PHB | Metco LCA
    996 Brake Kit| 17" CCW Classics | 17x11 ZR1 Replicas on all four corners

    425@6lbs | ???@12lbs | EFILive Custom OS3 | !MAF | SD
    11.73@12x/1.7 on worn out nittos... yaaawn!

  4. #4
    Forum tyhee Site Admin GMPX's Avatar
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    If there is only two COS5's on OS's that support FlexFuel then that is what you need to choose from.
    Need official EFILive help, please go here.
    For tuning support please post your questions on this forum (or other auto forums).
    Sorry if I don't respond to your PM, don't take it personal.


  5. #5
    Lifetime Member SS2win's Avatar
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    I only see support for 12225074 and 1221215 in 'C:\Users\New Owner\Documents\EFILIVE\V7.5\Bins\Custom OS" neither of which have flex fuel.
    2001 Camaro SS #2020
    Stock LS1 w/InconTT | REV Springs | Ti retainers | M6 | McLeod Twin Clutch
    UMI RR K Member | SLP Subframe Connectors | Global West TA | BMR PHB | Metco LCA
    996 Brake Kit| 17" CCW Classics | 17x11 ZR1 Replicas on all four corners

    425@6lbs | ???@12lbs | EFILive Custom OS3 | !MAF | SD
    11.73@12x/1.7 on worn out nittos... yaaawn!

  6. #6
    Lifetime Member SS2win's Avatar
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    Oops! Nevermind... I found some posts that explain the situation and I'm only 10 years or so behind the curve. SNAFU!

    The reason I was asking is I picked up a 95 Z/28 LT1 Torqhead conversion that has flex fuel and it got me thinking I'd like to update my SS to match. The problem is I don't want to loose my RoadRunner and the only 512M OS that supports flex fuel, 12216125, does not have a COS written for it. So I started looking at 1M PCM's and saw there's no COS5 for them... not the end of the world but between the two features, a pretty big loss to get flex fuel. I can use COS3 but saying bye to my Roadrunner is just sad...

    Back when the COS was being developed, I never though twice about it because E85 was rare and the sensors were expensive! I guess there just wasn't enough available room in 12216125 to do it? (not that I expect you to start now but it would be nice lol)
    2001 Camaro SS #2020
    Stock LS1 w/InconTT | REV Springs | Ti retainers | M6 | McLeod Twin Clutch
    UMI RR K Member | SLP Subframe Connectors | Global West TA | BMR PHB | Metco LCA
    996 Brake Kit| 17" CCW Classics | 17x11 ZR1 Replicas on all four corners

    425@6lbs | ???@12lbs | EFILive Custom OS3 | !MAF | SD
    11.73@12x/1.7 on worn out nittos... yaaawn!

  7. #7
    Forum tyhee Site Admin GMPX's Avatar
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    Yes I remember the sensors were very expensive back then.
    However for my own curiosity I had a look at 12216125 and yes indeed that binary is full! Approx 1000 bytes spare in the whole 512K so not enough to do what we need for a COS. Probably why GM started rolling out the 1Mb PCM in 2003.
    Need official EFILive help, please go here.
    For tuning support please post your questions on this forum (or other auto forums).
    Sorry if I don't respond to your PM, don't take it personal.


  8. #8
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    This is probably why custom OS wasn't done (of course Ross is correct)... you are looking to do Nitrous with E85? I know it has been done on the 1mb ecms.
    "All that is needed for the triumph of evil is that good men do nothing..."

  9. #9
    Lifetime Member SS2win's Avatar
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    No just trying to decide on staying with P01 or P59...
    2001 Camaro SS #2020
    Stock LS1 w/InconTT | REV Springs | Ti retainers | M6 | McLeod Twin Clutch
    UMI RR K Member | SLP Subframe Connectors | Global West TA | BMR PHB | Metco LCA
    996 Brake Kit| 17" CCW Classics | 17x11 ZR1 Replicas on all four corners

    425@6lbs | ???@12lbs | EFILive Custom OS3 | !MAF | SD
    11.73@12x/1.7 on worn out nittos... yaaawn!

  10. #10
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    P59>>>>>>>>>>p01
    "All that is needed for the triumph of evil is that good men do nothing..."

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