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2JZ Knock Target


racerxve
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Hi Everyone,

What sort of values are you using as knock targets for 2JZ standard knock sensors?  I am currently using the below values, my sensors read up to 900 sometimes at 7000 rpm. No audible knock on the dyno but then again, vented wastegate etc, the car is very loud and hard to hear. running GTX3582R at 18psi.

setup at 6khz frequency (narrow band)

RPM 3000 3500  4000  4500  5000 5500  6000 6500 7000

           420    515    605    700    700    700    800    800    800
           420    515    605    700    700    700    800    800    800
           420    515    605    700    700    700    800    800    800
           420    515    605    700    700    700    800    800    800
           420    515    605    700    700    700    800    800    800
           420    515    605    700    700    700    800    800    800

 

 

 

 

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You cant really compare to anyone else's engine.  The amount of noise an engine makes will vary with bore clearance, valve lash, ignition timing, boost pressure, etc.  On top of that the knock gain settings will scale the volume up or down too.

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My sensors also pick up a lot of noise above 6500rpm (2jz) The way I like to set it up is to log knock level on all cylinders during a pull with overly conservative timing, you’ll have a good baseline for normal engine noise. You can also use the high rpm lockout function.

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