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Old 12-13-2012, 07:38 PM   #1724
reid-o
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Member#: 103631
Join Date: Dec 2005
Location: Mililani, Hawaii
Vehicle:
2004 STI
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Quote:
Originally Posted by Maxwell Power View Post
Knock detection is more than just a voltage threshold on advanced systems.
Knock detection is about the frequency range, the amplitude, the window, detection duration etc etc. Knowing the proper settings for this helps to eliminate false knock detection as well as more precise light knock detection on par with OEM systems. Basic systems like those found in the hydra use a generic logic applied to a simple voltage threshold for overall engine noise.

I understand this part. I'm just wondering what this external device brings to the table to warrant its price. I downloaded the manual and understand what it does but don't understand how the logic differs from the el cheapo units like I have. I'm sure that it's much more advanced.
If I'm reading it correctly, the major benefit is the conversion of the signal (assuming all of the settings are calibrated as you mention) from analog to digital allows the unit to apply multiple algorithms simultaneously (signal processing) sort of like how MRIs have taken big leaps with new DSP strategies. It seems like something I'd have to see in action or hear other experiences.

I really like how the directions state the best way to callibrate the unit for knock is to get the car to knock. I understand what this means but it just made me laugh. I think they should put their disclaimer in bold right before this statement (with super huge font).
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