Electronic Nannies limiting Acceleration

[MNLightning]

I’d like it if Rivian would open up the accelerator from 0-20 and @ 100+ as it feels like the output is limited by programming. It’s fast but not the fastest truck I’ve owned and with 835 hp the trap speed is “artificially” ? Low. Wondering if HP Tuners has plans to add support (j/k)

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[R1Sky Business]

I’d like it if Rivian would open up the accelerator from 0-20 and @ 100+ as it feels like the output is limited by programming. It’s fast but not the fastest truck I’ve owned and with 835 hp the trap speed is “artificially” ? Low. Wondering if HP Tuners has plans to add support (j/k)

Probably liability issues

 

[Max]

I hear people losing traction even with these limitations. I guess with 7000 Ib if they let it loose, you may not get that much more acceleration but end up needing new tires a lot sooner. They probably have to make tires wider.

When did 3 seconds become slow?

 

[Zoidz]

The maximum speed is likely a limitation of how fast Rivian wants to allow the motor to spin without "blowing up". Rivian does not have a mutiple ratio transmission.

Putting it another way, should a manufacturer allow an ICE engine to crank up to 10,000 RPM so they can increase the top speed?

 

[LaunchGreen]

I’d like it if Rivian would open up the accelerator from 0-20 and @ 100+ as it feels like the output is limited by programming. It’s fast but not the fastest truck I’ve owned and with 835 hp the trap speed is “artificially” ? Low. Wondering if HP Tuners has plans to add support (j/k)

Which truck did you own that’s faster than the R1T? What was the 0-60 time?

 

[MNLightning]

Which truck did you own that’s faster than the R1T? What was the 0-60 time?

Built a Ford Lightning, Turbo’ed a Silverado SS, and a couple of Supercharged LT powered Sierra’s. All of which had faster 1/4 mile et’s and substantially better trap speeds. No idea on the 0-60’s but the launches were definitely more violent

 

[DuckTruck]

Built a Ford Lightning, Turbo’ed a Silverado SS, and a couple of Supercharged LT powered Sierra’s. All of which had faster 1/4 mile et’s and substantially better trap speeds. No idea on the 0-60’s but the launches were definitely more violent

Interesting. To be clear, none were unmodified from the factory, correct? I'm guessing if you shut off the R1T's Stability Control, you might slip around some more, but it wouldn't have the dramatic soundtrack of a roaring, built and blown V8 (which I do love!). I'd also be surprised if any truck out there is markedly faster to 60, or maybe even 80, than the Rivian. They may sound like it, but they sure doesn't feel the same as when you flick the R1T's on/off switch with your right foot.

Most all built engines would show their best in the far end of a quarter mile run, but the pre-production R1T I drove in Normal last Summer went from 0-130-0 in 6/10ths of a mile. The difference between that one, and the production model that kicked everything in that recent pickup drag race video (featured in the Forums a few months back), is that I don't believe the pre-pro had a limiter.

I was told that the production models needed one because of damage to electric motors at sustained high speeds. For some reason, I seem to recall a figure of 13.5k rpm (or maybe 18.5k rpm?) being that damage threshold. With all the excitement of that event, including my time on the track, I may have "mis-remembered" that figure. Regardless, that pre-production unit was still pulling at 130 when it came time to stop before that 25 mph turn came calling. It actually came to a stop well before we needed it to.

Amazing how all that speed arrives and disappears almost silently. According to inverse.com, the Rivian is now limited to 124.9 mph, although I've read others quoting a lower figure. Also, in that drag race video, the R1T seemed to top out at a lower speed well before the end of the quarter mile.

https://www.google.com/amp/s/www.inverse.com/innovation/rivian-r1s-vs-bmw-ix/amp

I love my gas-powered cars, but these amazing vehicles have me re-thinking if I'll ever buy another gas-only vehicle, maybe even not another that uses any dinosaurs for motorvation. I'm talking tailpipe emissions here folks, so no need to mention electric plants fueled by yucky stuff. I get it.

 

[E.S.]

Also take into account that a R1T weighs over 7k lbs. Speed is limited to reduce the chances of blowing out those tires (which have even tighter regulations). That and well, it's a 7k+ lb death machine. They probably want to regulate the speed to further lessen the impact of outrageous accidents.

 

[Dark-Fx]

Interesting. To be clear, none were unmodified from the factory, correct? I'm guessing if you shut off the R1T's Stability Control, you might slip around some more, but it wouldn't have the dramatic soundtrack of a roaring, built and blown V8 (which I do love!). I'd also be surprised if any truck out there is markedly faster to 60, or maybe even 80, than the Rivian. They may sound like it, but they sure doesn't feel the same as when you flick the R1T's on/off switch with your right foot.

Most all built engines would show their best in the far end of a quarter mile run, but the pre-production R1T I drove in Normal last Summer went from 0-130-0 in 6/10ths of a mile. The difference between that one, and the production model that kicked everything in that recent pickup drag race video (featured in the Forums a few months back), is that I don't believe the pre-pro had a limiter.

I was told that the production models needed one because of damage to electric motors at sustained high speeds. For some reason, I seem to recall a figure of 13.5k rpm (or maybe 18.5k rpm?) being that damage threshold. With all the excitement of that event, including my time on the track, I may have "mis-remembered" that figure. Regardless, that pre-production unit was still pulling at 130 when it came time to stop before that 25 mph turn came calling. It actually came to a stop well before we needed it to.

Amazing how all that speed arrives and disappears almost silently. According to inverse.com, the Rivian is now limited to 124.9 mph, although I've read others quoting a lower figure. Also, in that drag race video, the R1T seemed to top out at a lower speed well before the end of the quarter mile.

https://www.google.com/amp/s/www.inverse.com/innovation/rivian-r1s-vs-bmw-ix/amp

I love my gas-powered cars, but these amazing vehicles have me re-thinking if I'll ever buy another gas-only vehicle, maybe even not another that uses any dinosaurs for motorvation. I'm talking tailpipe emissions here folks, so no need to mention electric plants fueled by yucky stuff. I get it.

Hit 115 on the strip last weekend, truck drops back down to 112 if you keep your foot in. On 22" wheels. It definitely feels like it could be a 10 second 1/4 mile time if it didn't cap or reduce acceleration. Ran 11.55 @110 according to the time slip.

 

[SeaGeo]

Aren't they limiting the top speed to be consistent wuthering the rating of the tires? Or am I misremembering?

 

[CommodoreAmiga]

Looking/feeling “violent” feels may look/feel faster, but it is not necessarily faster. I recall the Clarkson/Hammond/May Top Gear years and every episode they raced a new car around the same track with a professional driver, and also they had a celebrity drive an econobox for a lap. Almost every time the lap looked dramatic on camera people would think “they must be fast” and the time was actually unimpressive — but the most docile and composed laps actually got the best times.

Several reviewers have commented that Tesla Model 3s “feel” faster because they have a more violent launch…. Yet the R1T actually beats them down the track.

 

[Zoidz]

Looking/feeling “violent” feels may look/feel faster, but it is not necessarily faster. I recall the Clarkson/Hammond/May Top Gear years and every episode they raced a new car around the same track with a professional driver, and also they had a celebrity drive an econobox for a lap. Almost every time the lap looked dramatic on camera people would think “they must be fast” and the time was actually unimpressive — but the most docile and composed laps actually got the best times.

Several reviewers have commented that Tesla Model 3s “feel” faster because they have a more violent launch…. Yet the R1T actually beats them down the track.

A couple of old adages I learned in SCCA Autocross that illustrate this:

"To be fast you have to slow down."

"The gas pedal is not an on/off switch."

A classic, great book on this topic is "Speed Secrets" by Ross Bentley.

 

[DuckTruck]

Hit 115 on the strip last weekend, truck drops back down to 112 if you keep your foot in. On 22" wheels. It definitely feels like it could be a 10 second 1/4 mile time if it didn't cap or reduce acceleration. Ran 11.55 @110 according to the time slip.

Thank you for sharing that. At the factory, 110 came and went while it was still pulling hard. The speed felt about topped out when we hit 130. Not sure if would have gone any faster or accelerated even harder with just me in the truck. Having three people and the camera gear onboard couldn't have helped with those numbers, but having Brian Gase os my co-pilot gave me the comfort and confidence to just hammer it all the way to 130, even as that 25 MPH sign was rapidly growing in the view ahead.

That confidence and experience sure made me comfortable in using all of the capabilities of the R1T from my first mile. It also helped to get that high-speed tutorial the day before, with RJ at the wheel. Best two experiences I've ever had in the front seat of any vehicle!

I'm fairly certain more than a couple of friends have returned home from the rides I've given and to answer queries of "What in the heck have you been up to!" or "You're guilty of something!"

I'll just say that a Rivian unchained absolutely rewired my brain as to what personal transportation and exploration can look, feel, and be like....forever!

 

[MNLightning]

Looking/feeling “violent” feels may look/feel faster, but it is not necessarily faster.

Several reviewers have commented that Tesla Model 3s “feel” faster because they have a more violent launch…. Yet the R1T actually beats them down the track.

I get what you are saying but the point is that the software isn’t letting it launch with anything close to full power imho. And then dials the power back down at the top. I’d like to have all 835 horses available to my right foot. Kind of like the automatic vs manual argument. The auto is usually faster but the manual is more engaging.

 

[Dark-Fx]

Thank you for sharing that. At the factory, 110 came and went while it was still pulling hard.

Somewhere around 100 is when it's rather obviously not giving full power anymore. My 1/8th mile time on that pass was 7.349 @ 96.15 mph.

Rivian probably decided on these limits to be able to offer the 175k mile warranty on the drive units.

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