PJBecker
Member
Did you see my experiment for freeway speeds? I tested 10th gear and found an equation:
55mph is where I can "run up the scoreboard" at 28MPG but it is also a very annoying speed unless you are on a 2 lane highway. And I lose about 1/2MPG for every MPH above that. I haven't done further testing below 55mpg or where it switches to 8th or 9th.
In town I can "run up the scoreboard" on fairly smooth surface streets where 25-40mph is normal and there aren't too many full stops. The alternating between electric and hybrid really optimizes gas on these things in that speed range. 40mph in 8th gear seemed pretty efficient but I didn't do official tests, things kept knocking me out of 40mph by getting in my way.
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I haven't done any testing, so to speak. However, I have noticed some differences in the shift scheduling between this new PB and my previous truck. Which was an 18 3.5l eco with a 10 speed. I've noticed that my new truck doesn't "skip shift" anymore and that the new truck also seems to try and get to 10th gear as soon as it can. I've also noticed what appears to be a "sweet spot" in the rpm range. It seems to stay at about 1400 rpm a lot. Like it will put the engine at that rpm and add or subtract electric motor to keep the desired speed. Maybe a coincidence, I don't know. I do like the truck a lot. I can't wait to see how it tows my travel trailer. I pretty much purchased the truck for the 7.2 KW generator alone as there are a couple of places each year where I use the trailer with no electric hookup. No more loud a$$ generators! Lol!
Pete
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