Thought about a loop of 78,15,8,805,5 which is about 74.3 miles per loop. 4 loops is 297.2 miles + a few local miles close to a charger.
4 Superchargers on (or just off) the loop, and 2 other charging opportunities with some easy diverts to cut it short.
Start at a supercharger, and aim to finish at the same place. (4 loops + some local loops). Last loop, set the destination as the end Supercharger, and car should tell me if I need to divert.
Will probably capture data on TeslaFI, and export that. Also capture route on Phone app as a backup.
Take picture of car, show got standard 20" wheels/tires, and tire pressure.
Aim to do it at a sensible speed (average approx 60mph over 5hrs). Will need to do it one evening, so the roads are clear.
Music will be on, HVAC will be on auto(but weather is mild, so probably not doing much), Lights will be on. Pick a day it's not raining.
Just need to plan the time.
This seems like a reasonable loop. If you go 60mph on the freeway, and do all freeway, I think it MIGHT be possible to get 290 miles. But it will be very, very tough! If you go 65mph (which I think you'd probably agree is the minimum reasonable speed on San Diego freeways) I think you'll have major problems. Maybe just do one loop and see how you're doing - however, it may be optimistic due to nonlinear SoC estimation - I think I detected some nonlinearity (drops faster at lower SoC) but you'd really have to do the same loop at a different SoC to see it, otherwise elevation change can confound the results. If you do one loop,
maybe I'll do a loop. Track your rated miles use! Unfortunately it is raining all this week apparently! I think you should not attempt to draft to make the experiment fair (following distance greater than 5).
Be sure to take pictures of the trip meter showing rated miles, and the detailed consumption numbers on the trip meter.
I think you need to do better than about 258Wh/mi to be able to get 290 miles.
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I finished my trip, here are the basic stats. I drove extremely efficiently, extremely rare use of brakes, used only slow acceleration. I doubt it would be possible to do significantly better in the same conditions & speeds. Generally minimized use of AP unless traffic was clear (so there wasn't a lot of slowing/speeding activity). Really did slightly better than expected:
265.5 mi roundtrip
45mph average speed
268Wh/mi
Rated Miles Used: 296rmi (implies there were effectively 240Wh/rmi, on average, as far as SoC estimation was concerned)
It was 4 main segments, and I've excluded my local back and forth at the destination from the above. Segment details:
Segment 1
93.3mi 271Wh/mi 63mph 109rmi Elevation: -750ft
Segment 2
36.7mi 273Wh/mi 28mph 34rmi Elevation: +625ft
Segment 3
39.8mi 193Wh/mi 29mph ~30rmi Elevation: -772ft
Segment 4
95.7mi 293Wh/mi 61mph 122rmi Elevation: +897ft
Vehicle Details:
P3D+, 235 width stock PS4S tires, odometer 4700 miles
45psi cold (48psi when driving)
Fair, dry conditions, minimal wind, ~70 degrees
HVAC On, set to "LO" temp,
AC off, fan speed 2-4. Sometimes HVAC was just off (notably segment 4).
Most (~85%) of the distance was covered on freeway (I-5, I-605, CA78, and I-15)
Freeway typical speed (when traffic was moderate) about 70-75mph. There was also significant traffic at times and spent perhaps 10-15 freeway miles at a crawl. I was always behind someone (4-5 following distance), so there was some small aero help.
Freeway max speed about 80mph
