2016 VW Passat - Boost/Timing

[BruceBDowns30]

I am slowly learning on my 2016 Passat A6. The only physical mod thus far is a CTS intake and I am running 93 octane at sea level.
I have some questions on the logs and ECU files.

1) For boost - I am seeing around 160 kPa on the MAP reading at 5500rpm in second gear. Yet the Intake Manifold Absolute Pressure (SAE) = 23.2 psi. Should I trust the MAP kPa reading which 160 kPA translates to around 8.5 psi or the intake manifold absolute pressure as the accurate measurement of boost?

2) For timing - I have only removed some torque management settings (i.e., maxxing them out) and I discovered the IAT correction table under advance. I commanded to add 2 degrees of advance as I figured this was a global adder. Didn't go beyond 12.5 degrees of advance without hitting knock retard around 6100rpm as it was about to shift. I also noticed a global modifer setting which is still stock 0.000 - what is the most effective way to add/subtract timing

I have attached my latest log file and ECU. I appreciate any feedback; the last time I touched HP tuners was around 15 years ago when I had a 1998 supercharged Pontiac Grand Prix GTP. My head is not even close to wrapped around how many tables there are in the VW Passat.

passat_12222024_2_DRIVEmode_93.hpl
2016Passat_tqmgmnt_12222024_1.hpt

[alwaysbrokemk5]

For boost try logging with the attached channels file. Mixing SAE PID's with 0x22 PID's slows down overall logging. MQB.Channels.xml

The absolute pressure includes atmospheric pressure so thats probably the confusion there.

For timing, you would want to be editing the "Base Corrections" -> "Port Flap Low" tables. Specifically the ones for VVL 0 since that is the status when at WOT.

[BruceBDowns30]

Thank you for providing your channel's file and answering my other questions.

For boost - I have found a few modded files on this forum for other VW/Audi vehicles. Have you found simple ways to increase boost and fueling? When comparing those modded files, I have found MANY differences between my factory file and there's which is why I have only been attempting to increasing timing a few degrees and measure KR.

Edit - I did a quick google on Port Flap low tables and came across this: https://cobbtuning.atlassian.net/wik...B+Tuning+Guide

Looks like that Cobb MQB covers the basics.

[aaronc7]

Not HPT specific, but these guides and other docs may help you get started

https://drive.google.com/drive/u/0/f...uKlQXY-8MhmuQF

Ecutek has one also

https://ecutek.atlassian.net/wiki/sp...+Engine+Tuning

[BruceBDowns30]

Not HPT specific, but these guides and other docs may help you get started

https://drive.google.com/drive/u/0/f...uKlQXY-8MhmuQF

Thank you - I snagged those files. The basic document is what I have been reading through and doing trial/error for a few hours today. I am at the point where I am extremely happy with the tune. I honestly don't want to add any timing at this point with the increased boost through the Max PR and commanded torque tables. I lowered my lambda through power enrichment. Now my stock diverter valve is extremely loud (the annoying flute sound). I don't see any knock retard and my STFT lock in at ~-1% thru 1-2 and 2-3, and 3-4 shifts. I don't want to go any further until I get this to a shop to put on the GFB diverter valve and catted CTS downpipe. I cannot for the life of me replace the DV and the local euro shop that changed my ATF fluid said my passat requires the turbo to come off to change it - not a driveway job I am comfortable with.

Once I get those bolt ons done, I'll schedule an hour on the dyno to get AFR readings and go from there. I likely won't touch it beyond disabling P0420 because I have the 6 speed AT and 80k miles on it, mostly city driving. I am afraid I'll blow it up at this point. Skipping all that, thank you very much. This has woken up my daily driver big time.

[aaronc7]

Glad it was helpful!

Any logs on how it's running now? Never worked with this exact box code/OS, and they tend to all be a little bit different and need different tables "moved out of the way" to get desired results

No issues with stock DV on mine at 30+psi, maybe something is causing it to open or something? I can't remember if HPT can log DV position or not. But usually if TPS is opening and closing it's a good sign the DV is probably getting commanded to open as well.

You mention get it on the dyno for AFR readings-- the car does have a good wideband from the factory and if anything I'd be a lot more skeptical of wideband at a dyno shop, especially if it's downstream the cats and all.

[BruceBDowns30]

https://www.youtube.com/watch?v=hOvSYUdZ__w - this is the noise i have had since I installed the CTS intake; it is much more pronounced with the increased boost.

I will post a log and tuning file - likely on Christmas afternoon.

What should I be using to get lamba/AFR readings from VCM Scanner? My old school brain is thinking if the STFT lock in at 0 or damn near 0 at WOT, I am on the right path.

[aaronc7]

That is a strange noise, hmm.

The log list posted above has "Actual Lambda" which is the reading from the factory wideband

Since it's closed loop fueling all the time and relative stock nature of your car, you really don't have to worry about fueling at all, as long as the O2 and everything is working right etc. Much more set it and forget it compared to older cars where you really gotta dial in that MAF or VE table etc. STFT near 0 is good, but +/- 10 isn't a problem at all on these either. The VE model is complex and not worth the effort to correct it (IMO) unless you're doing some major like cams, etc. There's a few tables to fudge the VE a little bit, but I don't think HPT has them defined.

Will look for the logs in a few days

[alwaysbrokemk5]

I believe that sound is just an artifact of the intake, not the first one I've heard do it. Some sort of resonance in the intake pipe itself. Can kinda hear it in this dyno clip of another ea888.3 https://www.youtube.com/watch?v=Ijkv2wzCRAs