vtraudt

I took the car out today and logged some data. I would be interested in comments and explanations as to what can be concluded from the information.
Car: 1998 Audi A4 1.8T quattro manual, AEB, dbc car.
K03/K04 hybrid, FMIC, downpipe, Miltek exhaust, Carbonio Intake, "+50hp" chip (T.A.P.), stock injectors.

Outside temp was around 40 deg F
Max boost was around 16 psi at 4000 RPM (18.5 deg when warmer), tapering down to 10 psi at 6500 rpm

vtraudt

The stock injectors are 210 cc/min at 3 bar, 242.5 cc/min at stock 4 bar pressure.
The 16.32 ms injector timing (seems to be the max):
What flow does that represent?
What duty cycle (80%?)?

vtraudt

Is it coincidence?
- As soon as injector timing is maxed out, the N75 goes to max boost dump.
- N75 dump goes down after 4000 rpm when turbo is tapering off

Are these assumptions allowed?
- turbo could flow more if N75 would not continue to dump boost all the way to red line?
- injectors maxed out at 2600 rpm already (at 90 g/s air flow?)
- N75 dumps boost and limits air flow to prevent lean condition?