Ok question...

does anyone know how the base 1.70ms inj time is calculated?  It clearly seems that it never goes lower then that on my car...  There must be some reason the ECU thinks it needs to keep it at least that high.

Does anyone else know what their min inj time is?

I'm starting to wonder now if my TVUB is just simply too high (even though AFR's are good @ idle and cruise).

Simply because the following:

Warm/Hot start is out of whack (maybe cold start is too rich as well, but the car starts fine when stone cold), I have the issue with light cruise (21+ in. Hg) being too rich, etc.

I got to thinking yesterday that possibly my TVUB values are just too high.  Although I would hope that Bosch was smart enough and make other adjustments so that you could make the TVUB's as close to what the inj specs are.  It's clear we either haven't found them or know how/what exactly is in calculating the base injection time.

Generally in KFKHFM if you raise the values does that increase fueling (richer), and the opposite if lowering values (leaner)?

I thought they were air mass corrections, not lambda corrections, so it would be the opposite ... higher means adjust MAF reading up (adding fuel to a too lean area) and lower means adjust MAF reading down (remove fuel from a too rich area).

Do I have it backwards??

Also keep in mind that by adjusting KFKHM you are adjusting the load that ECU can read. For example in my car i was getting some severe ignition retard (cf) although i have lowered my basic ignition maps enough. When i adjusted the KFKHM i managed to scale up the load that ecu reads and so my ignition and fueling also restored. This map is related to hardware moddifications that can increase airflow to the engine such as front mound intercooler with custom metal pipes bigger or modyfied airbox bigger valves etc. It is a very smart map and you must play with it in order to fine tune your ecu. Sorry for my english i wish you got the point.

MLHFM - converts the MAF voltage to air mass.
KFKHFM - corrects the air mass based engine speed and load.
KFMLDMN - is the minimum air mass based on engine speed and throttle angle.

There is also a global minimum for air mass, and an offset for the air mass after it has been converted from voltage using MLHFM.

For injection time there is a constant that determines the minimum injection time. Even if you want to inject less than this the ECU never will. This minimum injection time is applied after the calculations for injector scale and injector latency offset.