[Jlacour24]

I just recently logged a couple pulls to see how much boost pressure I am getting. Now I am worried about getting cylinder timing corrections and timing delta for knock adapt, as well as WGDC being close to or equal to 100%. I read up on it and people were saying switch to the 91 tune. So I switched to the 91 tune on 93 oct and am still getting some timing correction, but 0 timing delta for knock adapt. This is my first time really looking at this kind of stuff and it’s just worrying me because I’m not too sure what to make of uneven cylander timing. Can anyone inform me of some normal numbers to look for when looking at timing?

https://datazap.me/u/jlacour24/log-1...?log=0&data=16

[thejeremyman9]

You will never have perfect timing unless your fuel quality (octane) far exceeds what the map is demanding and/or you run a knock resistant fuel like ethanol. Generally speaking, small misc. timing corrections across multiple cylinders is normal when you are operating near the limit of fuel quality for how aggressive the map is with boost and timing targets. What is in that log looks reasonable. Trying to chase perfect timing will drive you crazy (been there, done that).

You dont have actual knock counts in the log but recurring knock at WOT = bad
Significant timing corrections recurring on one cylinder = bad = check that cylinder (coil, plug, etc)
Significant timing corrections recurring on all cylinders = bad = map probably too aggressive for your fuel.

But the small corrections are OK.

WGDC looks to be ~85% most of the time not close or equal to 100? You can check over B58 logs but that's probably normal for a S2 tune.

https://f30.bimmerpost.com/forums/sh....php?t=1732327

[Jlacour24]

These logs are from the 91 stage 2 tune. I was mainly just wondering if these numbers looked off because it was worrying me a little especially on the 93 tune. When I changed back to 91 they seemed a little more normal but not perfect. I’m looking to do spark plugs soon and will check other maitnence as well. Now I’m a less worried, Thank you for taking your time to help me feel sane!