The big turbo project Octavia was running slightly rich everywhere except and big loads at high RPM. This article shows how I did the MAF tuning to get the fuelling/AFRs where the ECU wanted them.
MAF Placement
Before I started tuning the MAF sensor signal I wanted to improve the MAF sensor signal. You can read about the changes I made to the MAF sensor placement and why I made the changes here.
MAF Tuning
The video below details the process I went through to tune the MAF sensor signal on the 1.8T engine after I changed the layout of the intake.