NefMoto

Setup:
2.7t AGB
630cc EV14 Bosch injectors
4bar FPR
95mm MAF (with new RS4 B5 MAF Sensor)

I scaled the MAF (MLHFM) with the program mafadjust.exe from the forum (from 81.5mm OEM RS4 B5 to 95mm)

I use the data for the injector from the manufacturer (similar to https://www.finjector.com/documents/6450c9f86cb90/0280158123_Data.pdf)

When idling at 840 rpm, the system achieves an STFT of +25%.

When idling at 1440 rpm, the system achieves an STFT of +-4%.

I don't know why the STFT is so high at 840 rpm.

At 840 rpm, approx. 4g/s air mass is measured and the injection time is approx. 1.9 milliseconds.

At 1440 rpm, approx. 5.8g/s air mass is measured and the injection time is approx. 1.65 milliseconds.

I don't know why the mixture is richer with more air mass and less injection time. I would have expected exactly the opposite.

I don't know if I should correct the data for the injectors next or if I should correct the data for the mass air flow sensor.

How would you proceed?

(https://i.postimg.cc/MTXr0g2G/KFKHFM.png) (https://postimages.org/)

(https://i.postimg.cc/x868rkp5/KFLF.png) (https://postimages.org/)

(https://i.postimg.cc/RhShb1dq/KRKTE.png) (https://postimages.org/)

(https://i.postimg.cc/T3LwS3Vj/TVUB.png) (https://postimages.org/)

(https://i.postimg.cc/QMcM8YnH/FKKVS.png) (https://postimg.cc/mc24Vj4s)

(https://i.postimg.cc/DZgysJhh/TEMIN.png) (https://postimages.org/)

I have calculated TEMIN according to http://nefariousmotorsports.com/forum/index.php?topic=1531.msg14587#msg14587:

349cc / 705cc @ 3.5 Bar = 0.49504
TEMIN = 0.49504 * 0.8400ms = 0.41582ms

You're struggling with tuning for two things at once.

You should tune idle/partial throttle for one of the two first

a) stock injectors, modified intake
b) modified fueling, stock intake

If you don't you're in for a world of hurt.

when you've got idle/partial nailed, then you can go on to bigger and better things.

Why is your TVUB not matching the finjector specs you linked to  ???

plug in stock maf and tune fueling first...