Knock Sensor in a n/t?

[StreetSleeper34]

Someone put a bug in my ear that it is possible for a n/t to have a knock sensor and highly beneficial if your are running high compression with adjustable cam gears and plan on using nitrous (large shots). I was hoping someone on here could let me know how this is possible without using a turbo ECU and whether or not this would be a good measuring tool, or at least to tell if something was wrong internally.

This all came about when using a datalogger, a single knock came up on the screen. We were all very confused by this , but then wondered if it were possible to actually have a sensor that read knock in a n/t. After asking around, a few non-dsm racers had mentioned that they use a sensor to measure knock, because of the threat that bumping up your compression can cause severe knock, and in some cases very catistrophic damage. So I just thought I would mention this to see if this is worth pursuing or not. Obviously this is a technical question, so I am relying on the responses to be from people who actually understand this and can give some advice. Thanks.

 

[TooSlowGSX92]

the 4g63 noturbo motor does have a knock sensor

 

[TimG]

the 4g63 noturbo motor does have a knock sensor

No... no there really isn't.

Street Sleeper - If you really want, you can be a test pig. I'm not sure if the n/t ECU supports the knock feature or not, but I believe it does not. My reasoning is if the turbo ECU can't get a knock signal, it will automatically set the knock count to 7 and keep it at that figure. The n/t ECU keeps knock at zero. Yet who knows if a knock sensor can actually work?!

Try this, get a knock sensor used from a yard or a parts car. There is a spot already tapped in your n/t block for it. Cut the harness plug on the end of the knock sensor wires and expose the 2 wires. One can be grounded to the chassis and the other should run to pin 9 on the ECU. See what happens. It can't hurt the car nor will it hurt your wallet.

 

[StreetSleeper34]

That was what I was leaning toward doing, cause I know that 1g n/t's that have swtiched over to turbo simply screw in the sensor, since there is already a spot for it on our blocks, but then their new turbo ECU's have the correct pin to support it. I did notice however that pocketlogger.com carries a knock box that can simply mount on our dashes. This takes the reading from the sensor and displays it digitally. This could be a more effective way for me to get an accurate count. Do you think that it would be benefitial to try this route...is knock something that I should be concerned with?

 

[huafist]

N/T 1G ECUs are not equipped to handle the knock sensor input. The primary function of the knock sensor is to allow the ECU to pull timing if a certain knock count is detected. Unless you've rebuilt the motor with some insane high CR like 13:1 or something, a knock sensor on a N/T is useless.
As far as screwing one into a N/T block, there's a little more to it - you have to tap the hole. It's there but not tapped.