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Thread: Dreaded knock.... cant seem to get my tune right

  1. #1
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    Default Dreaded knock.... cant seem to get my tune right

    Hey Guys,
    Kudos to the great forum and masses of information it holds

    I have been lurking on here for ages trying to learn as much as I can to get my tune right, but I feel that it is above my head at the moment... The more I play some things become spot on, but then I start having other problems.. lol.

    Any way, I have been messing around with my tune (attached) which was tuned by someone else but has always been problematic, knock and afr's jump all over the place. I feel that I have got the VE pretty much bang on, however I have been very cautiously playing with the 02 Dynamics to try and get rid of the spikes and knock on throttle stabs.

    I have attached my tune and a decent sized log where you can see there is knock all over the place, yet when I compare my timing to others and even stock it seems very conservative?

    *Note* please ignore the AFR spikes to 10 and >16 ever since I changed my PLX TTL to 232 circuit from my external MAX232 board to the small board off ebay featured in one of the stickies it has started spiking... I think the regulator on the board hasnt got enough puff to power the ttl converter and the PLX unit.

    Any tips or help would be greatly appreciated

    Car:
    Holden VX SS M6

    Alloy OTR
    85mm ported throttle body
    LS6 manifold with ported neck to suit TB
    Magnecore 8mm leads
    Tri-y headers
    2x 3" High flow metal cats
    Twin 2.5" Xforce cat back
    4.11 Diff
    PCV vents via a filter (ditched the catch can setup)
    Copper NGK plugs
    Attached Files Attached Files

  2. #2
    R.I.P Shawn, 1956-2011 WeathermanShawn's Avatar
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    If you can re-post your tune (as a tune file), I could look it over.
    2002 Black Camaro Z-28 M6 Hardtop 11.0:1CR 425HP/410TQ SAE (400TQ@3500RPM)
    200cc Heads, 228/232 110+2 Cam, 1 3/4" LT's w/catts, GMMG, Koni Shocks, Hotchkis Springs, 35/21 Sways, 17" ZR1's, 3.90 Gears Roadrunner PCM LM-2 Serial Wideband
    EFILive Closed-Loop MAF/SD Hybrid Tune..


  3. #3
    Lifetime Member Chevy366's Avatar
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    Can't we view .ctd files ? .ctd is what is used by EFILive now for the BBF (black box flashing) file extension .
    2005 1500 HD , Custom OS3 SD tune .
    2006 Trailblazer
    Dinosaurs and Plants gave their lives so that we may drive , long live fossil fuel .

  4. #4
    R.I.P Shawn, 1956-2011 WeathermanShawn's Avatar
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    Hey Chevy:

    Maybe I am the 'Dopey', but I can not do it on my end. I have the latest EFILive Scan & Tune, and BBL downloaded..but I still utilize laptop and Scan & Tune as my tool of choice.

    It is up to the OP. Its hard enough to get people to look at your Tune and Logs..so it up to him.

    I can see some legitimate KR issues at WOT (I can read log). I assume he is running SD Open-Loop..but since he is logging his O2's also (one bank is bad)..I am just guessing.

    OP, up to you..
    2002 Black Camaro Z-28 M6 Hardtop 11.0:1CR 425HP/410TQ SAE (400TQ@3500RPM)
    200cc Heads, 228/232 110+2 Cam, 1 3/4" LT's w/catts, GMMG, Koni Shocks, Hotchkis Springs, 35/21 Sways, 17" ZR1's, 3.90 Gears Roadrunner PCM LM-2 Serial Wideband
    EFILive Closed-Loop MAF/SD Hybrid Tune..


  5. #5
    Lifetime Member Chevy366's Avatar
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    Quote Originally Posted by WeathermanShawn View Post
    Hey Chevy:

    Maybe I am the 'Dopey', but I can not do it on my end. I have the latest EFILive Scan & Tune, and BBL downloaded..but I still utilize laptop and Scan & Tune as my tool of choice.

    It is up to the OP. Its hard enough to get people to look at your Tune and Logs..so it up to him.

    I can see some legitimate KR issues at WOT (I can read log). I assume he is running SD Open-Loop..but since he is logging his O2's also (one bank is bad)..I am just guessing.

    OP, up to you..
    Open and save as .tun file , then it is as was .
    I am on my Linux OS so can't try downloaded .ctd file , will have to boot into Winders and see , maybe you can't ?
    2005 1500 HD , Custom OS3 SD tune .
    2006 Trailblazer
    Dinosaurs and Plants gave their lives so that we may drive , long live fossil fuel .

  6. #6
    Joe (Moderator) joecar's Avatar
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    I can open his .ctd...

    Change the Windows file association for .ctd to be the tunetool instead of S&T...

  7. #7
    R.I.P Shawn, 1956-2011 WeathermanShawn's Avatar
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    Thanks Chevy & Joecar..that did it. Took a few more steps, but now I can open it.

    Always good to learn. I'll look it over along with you guys..

    Thanks for the tip..

    EDIT: Looks like he is running Open-Loop..but MAF enabled? C2901-C2904..
    2002 Black Camaro Z-28 M6 Hardtop 11.0:1CR 425HP/410TQ SAE (400TQ@3500RPM)
    200cc Heads, 228/232 110+2 Cam, 1 3/4" LT's w/catts, GMMG, Koni Shocks, Hotchkis Springs, 35/21 Sways, 17" ZR1's, 3.90 Gears Roadrunner PCM LM-2 Serial Wideband
    EFILive Closed-Loop MAF/SD Hybrid Tune..


  8. #8
    Joe (Moderator) joecar's Avatar
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    I can directly open his .ctd without converting it to .tun.

  9. #9
    Joe (Moderator) joecar's Avatar
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    See image...
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  10. #10
    Lifetime Member Chevy366's Avatar
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    Quote Originally Posted by joecar View Post
    I can directly open his .ctd without converting it to .tun.
    +1 on no conversion .
    Right click on Icon , choose "open with" > "EFILive Tuning Tool" .
    2005 1500 HD , Custom OS3 SD tune .
    2006 Trailblazer
    Dinosaurs and Plants gave their lives so that we may drive , long live fossil fuel .

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