I finally got some new readouts from my logger (after a long time of not having it). I'd like some help figuring out the knock that I'm getting.
Things to consider:
I have 9:1 pistons. I'm using 91 octane. It is currently 87 degrees outside with a humidity of about 8% (mostly cloudy, feels hotter than 87). Elevation roughly 3000 feet. Also, Peak PSI is only .66 bar (9.5psi). With 9:1 pistons, the Final Compression Ratio is just over 15.0:1 @ 9.5psi. 8:1 piston final compression ratio is just very close to 13.5:1. I also have 75A poly mounts. The fuel system is entirely stock except that the pump is hotwired, nothing has been replaced regarding fuel since I bought the car. I have not tried running the same setup with 100 octane. I'm going to try it when I run out of the 91 that's in my tank. My wideband does not read any extreme conditions when doing test pulls (or ever)
I don't know if this might cause phantom knock but my carrier bearings are shot and I feel vibration from the drive shaft almost all the time, accelerating and decelerating.
I'm looking to figure out what might be causing the knock and if the knock is from a legitimate source. Attached is the primary log that I'm working with.
Datalog_9_23_2010_12_30_9.PDB.xls.zip
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