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Thread: Is Trimalyzer for SD tunes only

  1. #16
    Fuel Injected! A95Y's Avatar
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    Quote Originally Posted by LeMarky Dissod View Post
    Oh Yes indeed.
    The nonmetallic valvecovers and the hard-to-find overpriced 16214681 knock module were specifically for the LT4's noisiER valvetrain.
    Those components are installed.

  2. #17
    Fuel Injected! A95Y's Avatar
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    Just for the heck of it

    I installed a set of tall aluminum valve covers to see if there was any difference. There was not. My small alternator was not charging, so I was in a hurry and stayed in third most of the time. I still need to address the 95 kpa knock.
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  4. #19
    Fuel Injected! A95Y's Avatar
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    Quote Originally Posted by steveo View Post
    the lt4 had lighter valves too
    try the original knock module to see if its better
    I don't have sodium filled. Lingenfelter built the LT4 heads with Ferrea stainless steel valves

    I am going to have to dig deep to find that. If I can't find it in a fair amount of time, I will buy one.


    Thanks

  5. #20
    Fuel Injected! A95Y's Avatar
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    I couldn't find the knock module. So if anyone has one for 1995 Corvette they can sell me or loan me, I'm all for that. Nonetheless, I had a couple knock sensors I ordered a week or two ago and installed them. That seemed to change some. I am also thinking of changing the knock sensor connectors, since the replacement wires are so much thicker and not 25 years old. I went for a 28 minute drive, mostly in third.

    Thanks again
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  6. #21
    LT1 specialist steveo's Avatar
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    wait
    you have dual knock sensors
    and a y body
    and an lt4 knock module
    will that even work? i thought that module was for single sensor
    that knock is still crazy. its definitely not real.

  7. #22
    Fuel Injected! A95Y's Avatar
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    I'm not sure what you are getting at. My car was built with dual knock sensors.

  8. #23
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    Quote Originally Posted by steveo View Post
    wait
    you have dual knock sensors
    and a y body
    and an lt4 knock module
    will that even work? i thought that module was for single sensor
    that knock is still crazy. its definitely not real.
    All LT1/LT4 Corvettes had dual knock sensors. On the 92-95 they were wired in series and went to a single input on the PCM. On the 96 they were each given a separate input to the PCM.

    The knock modules for all the C4 Corvettes were incredibly similar and used nearly identical circuitry (according to one of the engineers), which I can also confirm by looking at one of my spares and then looking at photos of the knock modules from, for example, the MEMCAL-equipped cars. However, when pressed about pinouts, said engineer was not quite as forthcoming with information. So unfortunately as of yet I still do not have accurate information as to exactly what each of the 8 pins actually do.

    A95Y, you can try the band-aid fix of adding teflon tape to the threads of the knock sensors to "desensitize" them, but unfortunately without the ability to fine-tune the frequencies the knock module is filtering out, you may be out of luck for getting accurate knock feedback on your OEM setup.
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  9. #24
    Fuel Injected! A95Y's Avatar
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    Member 69427 on the CorvetteForum knows about electronic timing control. He designed some of the systems. He seems very generous with information.

  10. #25
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    Quote Originally Posted by A95Y View Post
    Member 69427 on the CorvetteForum knows about electronic timing control. He designed some of the systems. He seems very generous with information.
    That’s exactly who I was talking about. I provided photos and data and asked for a pinout of the older knock module since he admitted to having documentation of it, and afterwards he went silent. It seems he’s willing to discuss the theory behind its operation but is mum about certain specific details.

    I would love to be proven wrong, though!
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  11. #26
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    Quote Originally Posted by NomakeWan View Post
    That’s exactly who I was talking about. I provided photos and data and asked for a pinout of the older knock module since he admitted to having documentation of it, and afterwards he went silent. It seems he’s willing to discuss the theory behind its operation but is mum about certain specific details.

    I would love to be proven wrong, though!
    Perhaps he is bound by an NDA signed long ago...

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  13. #28
    Fuel Injected! A95Y's Avatar
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    Quote Originally Posted by NomakeWan View Post
    That’s exactly who I was talking about. I provided photos and data and asked for a pinout of the older knock module since he admitted to having documentation of it, and afterwards he went silent. It seems he’s willing to discuss the theory behind its operation but is mum about certain specific details.

    I would love to be proven wrong, though!
    Out of curiosity, did you ask him in a post or PM?

  14. #29
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    Quote Originally Posted by A95Y View Post
    Out of curiosity, did you ask him in a post or PM?
    https://www.corvetteforum.com/forums...-fequency.html
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  15. #30
    Fuel Injected! spfautsch's Avatar
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    Quote Originally Posted by A95Y View Post
    I have CTS-V lifters, Scorpion non-aligning aluminum rockers with guideplates. Are these inherently noisy?
    I've run numerous guideplate setups with two different non-aligning roller rockers (one chromoly steel and one stainless bodied) and had all sort of false knock issues ('95 Y-body LT-1).

    After switching to the Scorpion shaft mount setup referenced in my signature, and Morel solid roller lifters (only needed due to very high spring load) I can finally drive an hour or two with zero knock events. Had I gone the shaft mount rocker setup from the start I would have had $500 more to spend on other fun stuff. You live and you learn.

    FWIW - just speaking from experience. Not everyone has false knock problems with roller rockers. My suspicion is it's more prevalent with aluminum head engines and first-gen ODBII ecu programming (and dual knock sensors).

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