Can you show me in FR where it in diagram shows that KFSZT isn't used? unless szout_w isn't used at all by some magic that isn't showed in diagram..
See the attached file for translated ZUESZ. Here is the snippet describing calculation of dwell time.
Calculation of angle output
The basic closing time for a selected voltage (eg 12 volts) is available in KFTSRL = f (nmot, rl).
The characteristic of the voltage increases FSWTM offer in the cold start and warm-up.
With dynamic load (B_swdy = 1), the closing time is multiplied by the factor ftsdrl until the time of TZSUDYN has expired. As long B_swdy is active, which has been triggered by B_swdy maximum occurred tsdrlmx the source for the factor of FTSDRLW. B_swdy is reset as long as drlsolf_w> DTSDRL is (re-triggering).
Calculated by then closing time is limited by TSMx upwards.
The correction of the influence of Ubatt is by the factor in the characteristic field KFSZDUB. A voltage offset between the measured and the voltage at Ubatt ignition module can be taken into account with DUBZS.
A positive speed gradient is corrected in the map KFTSDYN. The minimum open time limit applies separately to each ignition output.
I have only changed KFTSRL, FSWTM, KFSZDUB, and FTSDRLW and my tsrldyn values were indeed lower. I have not touched KFSZT.