I'm having some trouble (maybe) with knock. I'm not sure if the knock readings I'm getting are actually knock, or if it's just noise at higher rpm... at what voltage levels do you consider the knock sensor to be detecting actual knock?

I logged a recent run and attached the AEMLog stf file, as well as a screenshot. Can someone let me know if this is knock? Also, I'm not sure the knock sensor is still detecting the right sounds, now that i have the AMS 2.3L stroker kit in there.

Thanks!!!

 

1.2V @ 5krpm is not knock. Especially not at 9psi with only 10* of timing.

2+ volts would probably be knock.

 

Cool. Should I be looking for an average of 2V to consider it to be knock, or should I be looking at the peaks?

 

I am by no means an expert but what you see there is just noise from your engine(other engines will differ). 9psi and only 10 degrees of timing shouldn't have any knock. What you have done is a great example to find the normal noise from your engine.

yes with your motor to keep it safe start looking for peaks over 2 volts. I personally have mine knock control set at 2.5 volts and i also have a motor that is much quiter than yours to start with. Some people run 3 volts if you want to push it.

 

Just keep in mind all motors are different but you can identify knock on the log when you see a spike or spikes that are usually .50-1.00+ volts higher than the normal noise trend, they will usually stand out if it is very bad. Just be sure when you log to log at the fastest sample rate to get the best results.

 

Good point! try internal logging not PC logging for faster sampling rates.

 

Calibrate your knock threshold. Log Knock#1 Fuel or Knock#1 Retard to see when the computer is actually pulling timing or adding fuel. It may read knock above your threshold and take action, but you wont be able to see it because of the slow sampling rates.