Jump to content

Knock Level Limit?


INSW20

Recommended Posts

I have been looking at logs recently, and noticed that even when Knock Global increases, Knock Level is capped at exactly 1000*Knk Level Gain.  In this case, the gain is at 0.53, 4cyl using a distributor.  Is this normal?

The car is currently running 100 octane race gas, with what should be fairly reasonable ignition timing for 91 pump gas.

 

image.thumb.png.c6a7d23d59f778006f87c76c55f92a57.png

Link to comment
Share on other sites

Knock level global is the raw noise level from the knock sensor, this is multiplied by the cyl gain when the specific cyl window is active.  A knock level global of 1000 means the input is saturated, it cant measure a higher voltage.  If your cyl 1 knock level is showing a flat line at 530, this means the knock level global was pegged at 1000 everytime the cyl 1 window was captured.  

Im assuming you are using the stock sensor?, this saturation is common with the Toyota resonant frequency sensors, they usually arent useful with a modified engine.  Swap is for a flat response sensor.  If you already have a flat response, then just turn the main gain down.   

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...