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Tesla power limiting may also occur on extreme G-forces

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Streets of Willow 2

New racetrack discovery indicates Tesla power limiting may go beyond just temperature sensing.

We recently set out to conquer (once more) the Streets of Willow Springs racetrack, a technical, 1.6 miles long, with 13 turns, located approximately an hour north of Los Angeles. Being a short track with a lot of turns (most tracks are 2 to 3 miles long), it’s considered  a relatively low speed track. There’s opportunity to briefly reach 100+ mph on straightaways, but most of the time is spent within the 40mph to 80mph range.

Streets of Willow Springs is an excellent track for practicing turns at lower speeds. Unlike our race at Laguna Seca which proved to be one of the more difficult and dangerous tracks we’ve driven, this track had no retaining walls, smooth shoulders and overall a much less dangerous track to race on.

sow_map    _Streets of Willow

Tesla Model S Configuration

Tesla’s infamous power limiting feature to prevent overheating was not nearly as pronounced this time around because of the short bursty nature of the track. We could easily achieve a full five timed-laps without the dotted power limit line dropping below 160kw mark.

We used a set of new Toyo R888 racing tires (19″, 265 width) this time around as opposed to our usual BFGs. The Toyo’s held up exceptionally well in terms of wear and durability while also providing great traction. It was a cold day (temperature in the 50s) so we kept tire pressure higher than usual, aiming for 36 psi hot.

The Model S experienced a bit of  steering wheel lockup through turn 1 (known issue), but it was very short lived.

New Tesla Power Limiting Feature?

A new phenomenon was discovered on the Model S where the vehicle appears to cut power when experiencing high lateral G-forces along, and when the car is angled from flat level ground.

Case in point is the track’s #8 bowl turn which sports a 20 degree bank. This is where we experienced losing power for a brief second or two as we into the bank pushing nearly 1.2 Gs. The behavior can be seen in the video (2:20 min mark) where we were unable to accelerate past 40mph. We speculate that the combination of G-forces and angle from level ground (measured by the vehicle’s internal gyro) might be simulating an accident scenario, hence Tesla’s onboard system disables any additional use of power.

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Performance

Best lap time was 1:31, which was a nice improvement over last year’s 1:39. Our Teslarati 48 ran within the Green (Advanced) group with Speed Ventures. The fastest time in the class came in at 1:26 (Formula Mazda) while the slowest was 1:36. We felt that there was still a lot of room for improvement and with a little more practice, we should easily break below 1:30 next time. If not for the power limiting features of the Model S our lap times could be at minimum five seconds faster.

The max lateral G came in at 1.2 G which is on par with what we experienced in the past (using G-Force Rival tires).

Green Group Entering Skidpad CDE_2786-110114 Green Group Exiting Skidpad CDE_2867-110114 Green Group Skidpad CDE_2893-110114 Green Group Skidpad CDE_2923-110114 Green Group Turn 2 CDE_4632-110114 Green Group Turn 4 CDE_4571-110114

Charging and Power Consumption

Track Avg Energy

Power consumption came in at 1.2 kw / mile which translates to approximately 4 rated miles used per 1 actual mile of distance travelled.

There is a set of RV stalls within a 5 minute walk from the Streets. Unfortunately, there was only one stall with a 50 amp outlet which happened to be taken. We ended up pitting one mile away by the garage at Big Willow which had a couple of 240v 50amp outlets.

Travel

There are several possibilities of getting to and from the track.

ALSO SEE: Interactive Tesla Supercharger Map

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Superchargers WSFrom the South / East

  • Hawthorne Supercharger has been the charger of choice for us thus far. It’s 95 miles away, but because of significant elevation changes, coming to Willow Springs will consume over 110 miles of range, even when driving super conservatively. Coming back it will take only 90 rated miles.
  • Oxnard Supercharger just opened which is a little closer to the track at 87 miles away. Coming back will require only 66 rated miles making it a very attractive option.
  • Barstow Supercharger is 103 miles away from the track (EV Trip Planner estimated 105). The shortest route seems to be through Victorville, however it used 120 miles of range even while driving very conservatively likely due to the strong winds and elevation changes.
  • The Rancho Cucamonga Supercharger that’s currently under construction, appears to be a good option at 93 miles away.

From the North or West

And traveling from the North or West, Tejon Ranch Supercharger is the best option. 60 miles away, requiring 73 rated miles to get there but only 55 back.

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Tesla Cybercab and Robotaxi’s real advantage won’t be the ride service

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Concept art of a Tesla Cybercab in Las Vegas Strip as rendered via Grok

For a century, the car has asked the same thing of its owner, which is basically to pay attention. Even the best ride-hailing app like Uber or Lyft only moved the problem into someone else’s hands. You stopped driving, but you still sat in a stranger’s car, while half listening, and wondering whether to take a phone call in the car without being rude. The Cybercab has no wheel, no pedals and no driver. With Grok @bot now live inside it, it becomes something else entirely, and I think that matters more than the fleet count that everyone is tracking.

Grok @bot is an agent, not a voice assistant. A rider signs in once, and from then on can say what they need and watch it happen. Order dinner from a favorite restaurant. Fill the grocery cart. Move money, answer email, adjust a calendar, push a work project forward. Tesla engineer Yun-Ta Tsai confirmed it is enabled across every Cybercab and the rest of the Model Y fleet, and Tesla’s own pitch is that Full Self-Driving handles the commute while Grok handles the errands.

Think about what that does to a thirty minute ride. Uber sells you a trip, while Waymo sells you the same trip in a more private setting. Tesla is selling the thirty minutes themselves, returned to you with an assistant attached. Errands that used to eat a Saturday get done between pickup and drop off. The ride stops being dead time between two places and becomes a place of its own.

Tesla integrates Grok Bot into its vehicles for the ultimate personal assistant

Best of all, your Bots follow you into any Cybercab, and presumably your own Tesla, then logs you out automatically when you step out. Anyone can bolt a chatbot onto a screen, but much harder to own the vehicle, the autonomy stack and the assistant at once. It also quietly ties SpaceX’s Super Intelligence business to Tesla’s fleet, after Tesla converted its xAI stake into SpaceX equity. The relationship between those two companies is getting harder to describe as separate.

This is also where the hard questions start, because an agent that can spend your money in a vehicle other people also ride in needs some answers. How does it handle a voice it shouldn’t trust? What gets recorded, who can see it, and for how long? What happens when a rider leaves halfway through a task?

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If Tesla gets those answers right, the scoreboard changes. We have been counting Cybercabs and wait times. The more telling number may be what riders accomplish per trip. That is data almost no one else will ever have, and it is the real reason to watch Grok @bot.

What do you think? Leave me a comment.

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Lifestyle

Tesla’s mirrorless Cybercab will give riders a visibility upgrade

Tesla engineer confirms Cybercab update letting riders pull up rear and repeater cameras on demand.

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Tesla Cybercab camera visibility for passengers (Credit: Dan Burkland via X)
Tesla Cybercab camera visibility for passengers (Credit: Dan Burkland via X)

Tesla is working on a Cybercab update that would let passengers pull up the vehicle’s rear and side cameras on demand, and the request came straight from a rider.

The exchange played out on X late Friday. Cybercab rider Dan Burkland shared photos of the two-seater’s cabin screen after an evening ride, praised the UI team’s work, and left one request: let riders open the rear and repeater cameras whenever they want, “especially for peace of mind.” Tesla UI software engineer Evan (@CarCoder) answered with two words: “In development.”

The idea fits a pattern Teslarati has tracked since public rides began. Days after paid Cybercab service opened in Austin, Tesla sent riders a survey that asked them to rate the touchscreen, the app and the cabin, and to pick the features they wanted most. We reported on that survey in September, and a camera view is the kind of small software change Tesla can push quickly if riders keep asking.

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It also speaks to something unique about the vehicle. With no steering wheel, no pedals and no driver, passengers have no mirror to check and no way to see behind them. The hardware is clearly built for camera awareness, from the repeater cameras to the rear camera. Letting a passenger look through those same cameras would give a nervous first time rider a way to confirm what is around the car.

The timing matters because the fleet is growing fast. Tesla’s Robotaxi account said on Saturday that more than 300 Cybercabs are now serving Austin, an eightfold increase in 30 days, and Tesla AI chief Ashok Elluswamy named Dallas as the next city. More cars and more cities mean more people riding in a driverless vehicle for the first time, which is exactly when small trust features carry weight.

For now, the feature is confirmed only as in development. If Tesla follows its usual pattern with Cybercab software, riders could see it appear in a point release without any announcement, and Teslarati will watch for it.

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Elon Musk

Elon Musk’s surprise addition to the X Takeover lineup has fans talking

Elon Musk will join Saturday’s X Takeover at Giga Texas for a live virtual interview.

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Credit: Tesla Owners Silicon Valley
Credit: Tesla Owners Silicon Valley

Elon Musk will join X Takeover at Giga Texas on Saturday for a live virtual interview, according to Sawyer Merritt, who shared the news late Thursday. Musk will not be on stage in Austin. The conversation is set to stream for free on the @teslaownersSV account on X.

Organizers had kept expectations in check. In a September update, Tesla Owners Silicon Valley said Musk had appeared at the event twice before but was not promising a third appearance, even as fans hoped he would walk the Giga Texas grounds in person. A virtual spot matches 2024, when Musk gave a surprise interview of about an hour to the crowd in San Luis Obispo, as Teslarati reported at the time.

This year’s edition is a first in several ways. It is the first X Takeover held outside California and the first at a Tesla facility, with tickets selling out in eight days. Tesla provides the venue, but the event is produced independently by Tesla Owners Silicon Valley. The main event runs from 10 a.m. to 6 p.m. CT, followed by a drone and light show at 9 p.m. Maye Musk is the keynote speaker, Franz von Holzhausen is set for a virtual keynote, and Nicki Minaj is the special guest. Joe Tegtmeyer, whose drone footage Teslarati used to track the Optimus factory steel frame at Giga Texas, is also on the speaker list.

Musk’s interview topics have not been revealed, but the backdrop is busy. Tesla doubled its Cybercab fleet in Austin in late September, and last week Musk explained why Robotaxi hours only moved from 10 p.m. to 11 p.m.. Merritt also reported Thursday that Texas DMV records now show 319 registered Cybercabs, up from 169. NHTSA’s deadline for Tesla’s sworn answers on Cybercab certification is October 30, and Tesla reports third quarter earnings on October 21.

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Fans who cannot make it to Austin can watch the livestream on X. Musk tends to say more in unscripted settings than he does in prepared remarks, which is the reason this one is worth having open on Saturday.

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