New to E39. How's this look so far?

[FetzerValve]

Hey gang,

First time tuning on this platform and was hoping somebody could take a quick look at my log/tune. I'm currently just trying to work on the MAF curve of a 2012 Regal GS (LHU). Only mods are a ZZP hot air intake and a hollowed out secondary cat. I'm using some strategies that I learned while tuning my turbo LS. MAF error charts have responded nicely to the first two revisions.

Not MAF tuning related but one thing I noticed is the car is dropping boost from a peak of about 20 down to around 13. Delivered engine torque is less than last row of Driver Demand table so I'm not sure why it's pulling back boost. This can be seen in the log beginning at 8:37. Based on my research, I know this is a common question with this platform. I've read a ton about overboost limits, pressure delta, knock airmass, etc. I'm just having trouble putting together all the pieces.

Anybody got any advice on how the MAF curve is looking and how to keep this thing commanding 19-20 psi?

Thanks!

Buick 1.2-MAF tuning.hpt
Buick 1.1.hpl

[Azrael91966669]

double check its actually losing boost and not just closing the throttle ive read multiple times about throttle closing issue the fix in the knock mass and air mass tables along with driver demand

i am also tuning for a zzp intake and downpipe for giggles i used your maf table but got sensor out of range dtc so went back to my ats one