How Do I Log Both Knock Sensors With Datalogit ?

[-wj-]

Hi guys, I've got an S13 with an RB25 engine in it, and I'm remapping it myself.

I've got some mild knocking numbers close to the redline (it's got a power-fc pro, so ignition cut on revlimiter), and I'd like to know if there is any difference between the front and back knock sensor...

And for the record, what a/f ratio should I be aiming for at what load level ?

William

[paulr33]

the knock sensor signal in the powerfc is presented as a single value, that is, you can't see both

the only way to log both would be to have a multimeter on both signal wires

[Guilt-Toy]

you sure about that ?

Have you played with the raw logging data that you can save out of the datalogit software and then import it into excel?

It has 2 knock values. they are different values on my engine, the rear of the engine is nosier then the front on mine. which showed up on the stock power fc datalogit knock sensors & on my Gizzmo KMON.

the knock sensor signal in the powerfc is presented as a single value, that is, you can't see both

the only way to log both would be to have a multimeter on both signal wires

[Guilt-Toy]

Your such a help mate.. lol

Sorry. Start logging with datalogit and when you wish to see what you have run, save the log file or when you disconnect it will ask if you wish to save, open the log file with notepad press controll A. edit copy.

Open microsloth excel and paste into there. Drag down the sticky cells to the cell information and the first knock sensor is there, scroll across to see the second knock sensor.

I delete all the crap i dont need and have a excel file with all the usefull information i need.

one tip, Knock with a power fc.. = BBAAAA BUMMMMMMM totally useless information with anything more then 200 to 240rwkw and above.

you sure about that ?

Have you played with the raw logging data that you can save out of the datalogit software and then import it into excel?

It has 2 knock values. they are different values on my engine, the rear of the engine is nosier then the front on mine. which showed up on the stock power fc datalogit knock sensors & on my Gizzmo KMON.

[paulr33]

there u go , sweet

[-wj-]

thanks for the tips !

But that part about the knock sensors on pwer fc being useless above 240 rwkw ?

Why is that ?

[bnr#@]

I'm wondering the same thing here as to why the reading is useless?

[Guilt-Toy]

because engine noise can occur and send the knock sensors nuts. remember the knock sensors were made to be effective at a80kw at engine.

[bnr#@]

So whats the best solution to monitor actual knock then?

My knock sensors randomly have a spack (into mid 60's) and taking out timing does nothing, fuel is fine to