Datalog from my tuned VW wagon - summer blend fuel is here in the mid-Atlantic

TiGeo

TiGeo

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Not sure how many folks here are/may be interested in this kind of thing, but I datalog my wagon frequently and here's one today that I was checking to see if we have been switched over to summer-blend fuel...and we have been! Zero feedback on the knock sensors on this tune support better summer blend fuel; winter blend will see a lot more activity on the sensors. This is 1.8L EA888.3 with a larger OE turbo and a bunch of other goodies and of course ECU/TCU tuning to make, according to the data the tuner provides, about ~390/350 crank hp/ft lb which would be closer to ~350 all wheel hp. Factory power was 170 crank hp and 199 lb-ft. This is a second thorough just into 4th pull. Looks good. I note peak boost is down about 1 psi in the warmer weather and a "hole" that was present in the hpfp pressure in third gear is also gone in warmer weather. You can toggle on/off whatever parameters you want here.

https://datazap.me/u/karstgeo72/gsw-19?log=0&data=5-11
 
Looks pretty good to me. These engines seem to be pretty well instrumented compared the Subarus I'm used to. Do the OEM turbos have speed sensors on these engines? The boost curve seems well tuned to keep turbo speeds in check at high rpm, so the turbo shouldn't be too stressed.

The only thing that stands out to me is the STFT above 5600 rpm. It goes from 0 to 9%, there's a dip in mass airflow, and the AFR leans from the target 12.0 to 12.5. It seems like the MAF could be scaled better there.
 
twX said:
Looks pretty good to me. These engines seem to be pretty well instrumented compared the Subarus I'm used to. Do the OEM turbos have speed sensors on these engines? The boost curve seems well tuned to keep turbo speeds in check at high rpm, so the turbo shouldn't be too stressed.

The only thing that stands out to me is the STFT above 5600 rpm. It goes from 0 to 9%, there's a dip in mass airflow, and the AFR leans from the target 12.0 to 12.5. It seems like the MAF could be scaled better there.
Click to expand...
Wastegate duty cycle tuning is critical to overall turbo speed on these things. You get a big, slow IS38 and it kinda loafs vs. the zingy IS20 though. EA888 uses a MAP sensor and not a MAF. Thats why reading can look wonky.
 
twX said:
Looks pretty good to me. These engines seem to be pretty well instrumented compared the Subarus I'm used to. Do the OEM turbos have speed sensors on these engines? The boost curve seems well tuned to keep turbo speeds in check at high rpm, so the turbo shouldn't be too stressed.

The only thing that stands out to me is the STFT above 5600 rpm. It goes from 0 to 9%, there's a dip in mass airflow, and the AFR leans from the target 12.0 to 12.5. It seems like the MAF could be scaled better there.
Click to expand...
No drama like Subis. No turbo speed sensors on these. No MAF sensors ok these.
 
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