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data log questions

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Old 06-21-2015, 06:42 PM
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Originally Posted by raceredf150
So a postive knock count is a good thing? Also just did a stock tune log and same thing is happening...Showed battery voltage 220+volts cat temps upper 7000f. I only selected a few different pdi 's to log this time too. So i dono if im just dumb and doing something wrong or i need money for a new laptop or tuner lol
A knock sensor these days don't just listen for a knock. They also are used to sense the advancement of the crank. A positive knock reading means it's going to retard the timing to either make it quit or prevent pingin. A negative knock reading will advance the timing because the engine can handle more power. That's basically how it works in a nutshell.
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