At what voltage does the stock computer start to pull timing?
Are any other computers more sensative?
Just to clarify, it produces up to 5 volts? I'm not totally sure.
At what voltage does the stock computer start to pull timing?
Are any other computers more sensative?
Just to clarify, it produces up to 5 volts? I'm not totally sure.
The voltage that the computer responds to changes with rpm.
To expand on what was just said, the knock sensor produces between 0-5 volts. The more noise/knock, the higher the voltage. But your engine in general gets louder as the RPM's go up, so your computer has the knock sensor perimeters set up via rpm. So for example at 2000 rpms it could be 1.28 volts before it will pull back timing, and 3000 rpm's the threshold may be 2.10 volts, at 4000 2.60 etc.....
The good thing is those perameters can be adjusted if needed.
The best way to see if your car is really pulling boost or timing because of knock is to put it on a scan tool and see what it does.
later,
Cindy
I would recomment getting a scan tool as well. I have an OTC 4000E and it will show you whether or not knock is present (yes/no), knock voltage, and how much knock retard is occuring on each cylinder while you drive.
Not a problem with a drb2 readily available. I was just asking for curiosity reasons, Thank you.
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