Update:
Final results!
P85: 111.3 miles, 35.0 kWh, 315 Wh/mi
P85D: 112.3 miles, 35.4 kWh, 316 Wh/mi
For comparison, the results of the previous test (pre-torque sleep) were:
P85: 111.3 miles, 34.1 kWh, 306 Wh/mi
P85D: 112.2 miles, 39.5 kWh, 352 Wh/mi
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So, I did a preliminary test of the new firmware received this evening (v6.1 2.2.140) immediately and the results are very promising. Enough that I'm going to make sure that I talk my fiance into doing an updated side-by-side test with her P85 tomorrow like in my previous thread and video. She is returning early from a short trip, so, could work out!
Should be about the same conditions and route as last time.
Differences being:
Hoping to try this tomorrow afternoon, heading to the same Japanese restaurant for lunch.
If I'm right in my estimates based on my ~35 mile drive tonight the P85D will use less energy than the P85 this time...
So, for the first fun part, here are the details of the test trip I did alone that have convinced me a new side-by-side is needed:
First, I've never seen a Wh/mi in the 200s on the P85D... ever. Not even on short stretches. Second, this same trip (just about) I did in the car a few days ago at ~430 Wh/mi.
I'm impressed so far. Regen/coasting seems to work much more efficiently than previously. I noted a few times during the first side-by-side test that at some points the P85 would be in regen while the P85D was either still using power or barely breaking even on power. The P85D seems to so better with this now. I was seeing slight regen even on small downward inclines with cruise set. Pretty cool.
Additionally, I did note three independent instances of hiccups in the new firmware, all at < 10 MPH and while turning sharply and decelerating. (I'll be sending a note to Tesla after I finish this post.) Into my driveway, a U turn, and a left turn on to the highway on ramp. For anyone who has driven a manual ICE car, it felt like a sloppy downshift. Like if I had let the clutch out too fast when downshifting. I'm guessing this may relate to one of the motors engaging or disengaging it's regen at the time and not being smooth about it. Was exactly the same all three times. Probably pretty repeatable. In the final instance when I was turning right to prepare to back into my driveway I felt what I believe were the front wheels skip as it happened, as if they had locked or slowed substantially for a moment (split second).
Overall... seems like a very promising update. Can't wait until tomorrow! *puts GoPros on charge*
Edit: It is worth noting: At 277 Wh/mi that is roughly 270 miles @ 65 MPH (using the highest usage I've seen out of my P85's battery at ~75kWh). Consider the elevation changes in my @ 65 MPH test legs and factoring for the efficiency of regen... I think the original quoted 285 miles @ 65 MPH number may be completely doable on flat terrain.
It is also worth noting that I beat the P85D rated miles on this trip by several %. Usage was closer to (P)85 rated miles...
Final results!
P85: 111.3 miles, 35.0 kWh, 315 Wh/mi
P85D: 112.3 miles, 35.4 kWh, 316 Wh/mi
For comparison, the results of the previous test (pre-torque sleep) were:
P85: 111.3 miles, 34.1 kWh, 306 Wh/mi
P85D: 112.2 miles, 39.5 kWh, 352 Wh/mi
----------------
So, I did a preliminary test of the new firmware received this evening (v6.1 2.2.140) immediately and the results are very promising. Enough that I'm going to make sure that I talk my fiance into doing an updated side-by-side test with her P85 tomorrow like in my previous thread and video. She is returning early from a short trip, so, could work out!
Should be about the same conditions and route as last time.
Differences being:
- that this time I will use TACC to pace the P85 instead of setting cruise to the same value and then having the P85 slowly pull away over the miles like it did last time (some reason the cars couldn't maintain perfect cruise sync)
- No way to disable TACC or fall back to the old style cruise.
- the P85D having torque sleep now
- 1000+ miles more on both cars/tires than last time
Hoping to try this tomorrow afternoon, heading to the same Japanese restaurant for lunch.
If I'm right in my estimates based on my ~35 mile drive tonight the P85D will use less energy than the P85 this time...
So, for the first fun part, here are the details of the test trip I did alone that have convinced me a new side-by-side is needed:
- Total trip was 34.8 miles, 11.1 kWh, 318 Wh/mi
- Battery was a little cold for the first part with regen limited around 35kW.
- Trip included a single 0-60 insane/non-range mode launch
- According to timing from my video, no improvement on this front yet and same power consumption as before according to the dash
- That's not what I was going for tonight anyway. Just tested for completeness
- According to timing from my video, no improvement on this front yet and same power consumption as before according to the dash
- Rest of trip was Sport/Range Mode
- ~6 miles of rural and in-town driving.
- This leg is somewhat uphill
- Last several trips on this stretch were 500+ Wh/mi in the P85D.
- I reset trip B after the 0-60 launch (1.5 miles into this stretch) and the remaining 4.5 miles yielded a respectable 369Wh/mi, roughly on par with the P85.
- Jumped on the interstate and set cruise at 65 MPH (minor interuptions due to TACC slowing as people moved around)
- First 14 miles were a slight net uphill yeilding 319Wh/mi.
- The first 3 miles of this part of the trip were < 180 Wh/mi!
- Turned around, reset trip B
- Return 13 miles were a slight net downhill yielding 233 Wh/mi.
- Average for the round trip on the highway at 65 MPH: 277 Wh/mi.
- First 14 miles were a slight net uphill yeilding 319Wh/mi.
First, I've never seen a Wh/mi in the 200s on the P85D... ever. Not even on short stretches. Second, this same trip (just about) I did in the car a few days ago at ~430 Wh/mi.
I'm impressed so far. Regen/coasting seems to work much more efficiently than previously. I noted a few times during the first side-by-side test that at some points the P85 would be in regen while the P85D was either still using power or barely breaking even on power. The P85D seems to so better with this now. I was seeing slight regen even on small downward inclines with cruise set. Pretty cool.
Additionally, I did note three independent instances of hiccups in the new firmware, all at < 10 MPH and while turning sharply and decelerating. (I'll be sending a note to Tesla after I finish this post.) Into my driveway, a U turn, and a left turn on to the highway on ramp. For anyone who has driven a manual ICE car, it felt like a sloppy downshift. Like if I had let the clutch out too fast when downshifting. I'm guessing this may relate to one of the motors engaging or disengaging it's regen at the time and not being smooth about it. Was exactly the same all three times. Probably pretty repeatable. In the final instance when I was turning right to prepare to back into my driveway I felt what I believe were the front wheels skip as it happened, as if they had locked or slowed substantially for a moment (split second).
Overall... seems like a very promising update. Can't wait until tomorrow! *puts GoPros on charge*
Edit: It is worth noting: At 277 Wh/mi that is roughly 270 miles @ 65 MPH (using the highest usage I've seen out of my P85's battery at ~75kWh). Consider the elevation changes in my @ 65 MPH test legs and factoring for the efficiency of regen... I think the original quoted 285 miles @ 65 MPH number may be completely doable on flat terrain.
It is also worth noting that I beat the P85D rated miles on this trip by several %. Usage was closer to (P)85 rated miles...
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