Stage 2 Typical Knock Sensor Activity

[Venumous]

Hey guys,

Curious as to what is normal knock values for the 3.0T on a Stage 2 tune on 93 octane. I finally got a chance to log with VCDS and Lambda looks great but the knock values ranged from 4 to 7.5 degrees from 4500RPM up in all 3 logged cylinders. I have new coils and plugs gapped at 0.028 (OEM plugs) and the log was taken on 93 octane with no E85. I typically run E22 to E25 but for the log below it is almost pure 93 Sunoco.

https://datazap.me/u/venumous/s4-sta...8&zoom=290-407

I'm new to this platform but that much knock is not typical or safe on the other platforms I have been on in the past.

[AudBoost]

I would recommend gapping the plugs to 0.024. This seems to help with high rpm knock.
As far as what values are within limits that will probably vary based on who you ask but at 3 to 4 degrees I would say you are ok. 7.5 might be of some concern.

[Venumous]

That is at least a little reassuring as I intend to run E20 plus almost at all times. I will log to see if that brings the values more in line with what you're saying.

[Tony@EPL]

Over all the logs dont look bad... I saw you noted on facebook the facebook group that you mentioned the car is still misfiring on 4,5,6. Misfires can cause higher then normal knock correction, Id address this before taking ANY logs at face value.

I agree about trying to gap the plugs down a bit!

Let me know how I can help.

[Venumous]

That's incorrect. I mentioned the car was misfiring after the cat took a dump and his not since it was replaced. I replied to that post to clarify that.

Sent from my SM-G950U using Audizine mobile app

[Venumous]

I can regap to 0.024 and will be going back to e22 or so as a normal fuel mix. As long as the knock isn't disturbing I'm fine with it. On the EJ25 and supercharged 5.0 platforms people would shit bricks over 7 degrees of knock.

Sent from my SM-G950U using Audizine mobile app

[xxdunnxx]

I can regap to 0.024 and will be going back to e22 or so as a normal fuel mix. As long as the knock isn't disturbing I'm fine with it. On the EJ25 and supercharged 5.0 platforms people would shit bricks over 7 degrees of knock.

Sent from my SM-G950U using Audizine mobile app

The typical answer is that Audi's ECU is insanely more smart and deals with knock more efficiently. It's possible it's bad gas or plug gaps are too large and you're getting blowout.