[Keik E92 M3]

What exactly should i be looking at to make sure my car is running correctly? Just trying to under stand these logs .... I took some 3rd gear and 4th gear logs today...

[mycoupe]

+10000

[Ilma]

For starters.......

1) That your boost is hitting target and is stable throughout the rpm band with no dips or spikes other than at the shift point.

2) That your Drive by wire throttle plate is fully open and you do not have any significant DME induced closure of the throttle plate.

3) That your ignition timing rises in a gentle upward slope with no significant dropouts. The stock ignition curve goes from around 7 degrees of advance at around 4K rpm up to around 13 degrees by redline.
With a tune, this will vary by how much boost and ignition correction you run, but generally speaking you still should see a rising timing curve as rpm's increase.

4) Your air/fuel ratios should be somewhere in the low to mid 12:1 area when you are at WOT.


These are the fundamental things I watch for.

[Keik E92 M3]

Originally Posted by Ilma

For starters.......

1) That your boost is hitting target and is stable throughout the rpm band with no dips or spikes other than at the shift point.

2) That your Drive by wire throttle plate is fully open and you do not have any significant DME induced closure of the throttle plate.

3) That your ignition timing rises in a gentle upward slope with no significant dropouts. The stock ignition curve goes from around 7 degrees of advance at around 4K rpm up to around 13 degrees by redline.
With a tune, this will vary by how much boost and ignition correction you run, but generally speaking you still should see a rising timing curve as rpm's increase.

4) Your air/fuel ratios should be somewhere in the low to mid 12:1 area when you are at WOT.


These are the fundamental things I watch for.

Thank you.. Props

[Mr_PharmD]

i dont think i want it to low and mid 12 at wot.... 12-11.5 a/f would be best

[secretsquirrel]

Originally Posted by Mr_PharmD

i dont think i want it to low and mid 12 at wot.... 12-11.5 a/f would be best

There's been significant debate about this considering that the engine is DI