Hello Henrik,
I set the baud rate to 38400, that helped a bit.
Then tried set the LCD_COMMANDUS to 1500 that gained hardly anything but made the LCD a bit unreliable.
The count time is down to 75, 50 is loo little, i get no signal when cranking,100 slows the routine cycle down to 8Hz.
Now I got the frequency of a complete routine up to 11.5 Hz.
I guess that should do.
Now I´m back into hardware, soldering and juggling tools, after that testing with real electric motors.
Noise suppression is a real challenge in car electric.

I appreciate your help and the help of all of you folks.