R33 GTSt Knock Indicators

[djb23_gtst]

Hi Guys,

Im wondering if anyone has done this b4:

Parallel some indicators lights/leds off the knock sensor inputs into the R33 ECU to warn when the engine is knocking?

Could be a useful tuning aid, and some free insurance for engine damage.

Anyone done this b4?

Thanks

Dan

[JimX]

I think Jaycar has a kit which does exactly this.

[Roy13]

This is good thinking if any one could find out the voltage spectrum they work on this could be easily done!

[djb23_gtst]

I suppose I could hook up a voltmeter and just watch to see what voltage is comning through.

Does anyone have any idea what it should be?

[Roy13]

I had a look in the jaycar site and couldn't find anything!

Trouble it you have to get it to knock before it puts out a voltage, maybe a small ball pain hammer near the sensor.

[predator]

jaycar has a "air fuel" guage thing which is basically a series of LED's which indicate rich or lean.. there is an article on autospeed somewhere. Other alternative is just an aftermarket guage - very useful if u want to tune yourself.

Pro tuners usually just use a "microphone" (or close to), attached to the block to listen directly.

[Cool Hand Luke]

If its pinging, you can hear it anyway....

[djb23_gtst]

OK, found some info:

Sensor output is 0-1 V, so forget putting a globe in parallel as it might cause enough voltage drop to prevent the correct sensor signal reaching the ecu.

I have been told that a VU meter type kit, similar to that used to display the output from a tape player can be adapted to do this job. Jaycar does have a kit for doing this apparently.

Could always get a multimeter set to a low scale and use that too.

[Roy13]

You could also use the Air fuel ratio kit from jaycar as an oxygen sensor also outputs 0 > 1 volt. And just invert the output so that the green end of the scale becomes the low knock end as it is now working in the oposite!

Might have a chat to microtech as there tuning software has this display on the screen, i'd just read it in reverse!

How sure are you that they ouput only 1volt.