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Oh boy, J&S. I personally won't trust it. Of course I don't have one. But there are so many noise that go on in the engine bay, you tell me a little microphone can pick up it all and the processor it has could tell the difference between knock and regular engine sound?
If it runs on the safe side, it would retard timing even when actual knock is not there.
If it runs to produce power, it may not pick up all the knock. To me that tunning is a little scary, like walking a fine line.
On a seperate note, I read some where professional race team put strain gauges on the cylinders of the race motor. That mean for our I-4 we will need 4 seperate strain gauge. By doing this, they can physically see knock based on reading from the gauge?
Can anyone confirm if this is indeed valid. From a mechanical point of view, it does make sense, as knock are mini explosion in the cylinder that happens out of sync with regular combustion process?
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