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Old 08-31-2005, 11:17 AM   #13
serendipity
Scooby Specialist
 
Member#: 54597
Join Date: Feb 2004
Chapter/Region: MAIC
Location: Gaithersburg, MD
Vehicle:
08 'Busa, 08 ML63
10 Multistrada, 996 Targa

Default

You can set the shift point by holding the button down till the light comes on green, then revving to 1/2 the desired shift point, and pushing the button again.

Shift is indicated with a Green light. Moderate knock with Amber (Red + Green together), and Heavy knock with Red.

It's not possible to hook it up without the tach signal - it needs to know the RPM so that it can "filter" background engine noise. Otherwise it would just be lighting up constantly at higher RPMs like a KnockLink. The light is calibrated by letting it record engine noise by reving to idle, half of redline, and near redline in turn - the sensor then interpolates the points to come up with an engine noise "curve" that it uses to distinguish between background noise and knock events (a knock sensor is just a microphone, after all). The sensitivity can then be adjusted up or down from there.

It's a pretty trick unit. If you have a DTEC, it'll supply Tach and Knock level inputs to be logged or displayed as well.
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