Hymotion and engine temp

I am new to ScanGauge II so I am just finding some of the interesting things to monitor and how the Prius behaves.

I have always been aware of the warm-up phase before stealth mode is easy to drop into. But until recently, I wasn't sure exactly when that happened. Another thread mentioned 157 F water temp is the mark. So I started monitoring the water temp today. Sure enough, as soon as it reached 157 F then the Prius slipped into stealth mode easy.

What makes this interesting with a Hymotion battery is what happens after reaching 157 F. I assume that once I get to 157 F and I am in stealth mode, then I am in S4. (correct me if I am wrong)

Since with the Hymotion battery you can maintain EV mode for a long time (25 miles) at 32 mph or less, that gives the temp a long time to cool down.

So even when the temp is 30 degrees F below the 157 F area, the Prius is still in S4 and slips into EV mode easily whenever the speed is 32 mph or less.

I am just now experimenting with this to see the limits. Has anyone else noticed any tips on how Hymotion affects the typical Prius limits?

 

I think I entered 1.5 L for the engine and 12 gallons for the fuel tank.
I recall that I looked up those figures at the time I first configured the SGII.

 

When the engine is warmed up, I notice that I can get 42 mph in EV mode and maintain it with cruise control for the duration that the Hymotion battery lasts. Although 42 mph is the limit and being on the edge can trigger the ICE. So my rule of thumb is to set the cruise control at 40 mph.

I have not yet done a full EV test to determine my range in this mode. But I think it would be around 25 miles. The roads are too messy with snow/slush for me to do a worthwhile test right now.