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Is Prime more quiet +85 mph?

Discussion in 'Prime Main Forum (2017-2022)' started by bwilson4web, Jul 10, 2017.

  1. bwilson4web

    bwilson4web BMW i3 and Model 3

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    So I'm racing East to beat the sunrise Sunday morning through the fog. Upon reflection, the Prime didn't have the 'sound and fury' I remember with our Gen-3 and Gen-1. Anyone else with speeds over +80 mph?

    Bob Wilson
     
  2. ForestBeekeeper

    ForestBeekeeper Active Member

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    We normally drive our cars on the interstate with cruise set at 82mph.

    I see a big difference in noise between summer tires and winter tires.

    Our Gen-3 makes more noise but it requires it's ICE to be running from time to time, and it is 6 years old. Whereas our Prime is much quieter running on battery.
     
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  3. xvs

    xvs Member

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    If you're going to illegally exceed the speed limit and thereby endanger not only yourself but everyone around you on the road, any difference in loudness is really immaterial. If the car is quieter at those excessive speeds, it's only because Toyota was making it quieter at lower speeds. The fact that it may be quieter is no excuse for breaking the law and endangering yourself and others.

    As stated on the Toyota site:
    Always drive safely, obey traffic speed limits and laws and focus on the road while driving.
    https://www.toyota.com/content/ebrochure/TSS_CFA_Final.pdf

    You may wish to refer to the Japanese Toyota website, which states:
    希望の車速(約50km/h~100km/h)をレーダークルーズコントロールスイッチでセットすることにより定速走行を開始。
    トヨタ クラウン マジェスタ | 安全装備 | Toyota Safety Sense P | トヨタ自動車WEBサイト

    If you are not well-versed in the Japanese language, I will inform you that it suggests that the maximum speed driven using cruise control should be about 100km/h.

    If you are in Texas, which is the one state that has some road segments which can legally be driven at over 80 mph, I retract my comments about legality, however if you want to follow Toyota guidelines (as would be prudent), you should still drive much slower.

    For your information, here is the list of maximum speed limits by state:
    | GHSA

    And here is the first listing on Google for "Speeding Attorneys", since the first listing is usually the best:
    Traffic Ticket Attorneys | DMV.org
    At the rate you're going (pun intended) you are liable to need legal representation.

    I hope for your sake that you slow down and think about your reckless actions.

    -----

    The above was a parody of your last post to me in another thread (Adaptive cruise control / safety sense issue | Page 4 | PriusChat), and is equally cogent. In fact, I do notice that this car is a lot quieter and more stable at 80 mph + than my old Prius 3 :)
     
    #3 xvs, Jul 10, 2017
    Last edited: Jul 10, 2017
  4. ForestBeekeeper

    ForestBeekeeper Active Member

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    Interstate going through our town is posted at 75mph. Driving at 82 keeps me from being ran over by the state troopers as they zoom by me.
     
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  5. Mendel Leisk

    Mendel Leisk Senior Member

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    +80 mph, before sunrise, in fog? :eek:

    80 kmh is usually my limit, I steer clear of the freeway which is 10~20 km more IIRC.
     
  6. bwilson4web

    bwilson4web BMW i3 and Model 3

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    I'm beginning to think the P610 transaxle may have superior noise characteristics at higher speeds. The P410 transaxle with co-axial motor generators may be more difficult to build in a way that minimizes vibration modes.

    The P610 shorter gear shafts anchored in the aluminum frame would reduce how much relative motion they can make. In contrast, the P410 coaxial MG1, PSD, and MG2 makes a longer series of shafts whose vibrations could in effect pass between them and to the case. The P610 noise reduction may also be helped by the increased ATF cooling to help dampen gear-to-gear interaction.

    Driving at high speeds is normally stressful except in low traffic, perfect road and weather conditions. However, the dynamic cruise control, the radar, provides an additional level of protection following other vehicles.

    In the past, leading vehicles would change speeds and our imprecise eyes would not detect this until the closing distances and relative velocities led to stressful overtaking. This is even worse in low light and poor visibility. So I was pleasantly surprised at how the Prime quietly and efficiently followed the lead without 'invading' the stopping space in between. It was in effect, ad hoc "platooning."

    I had an introduction on the drive home on I-81 from Scranton PA in the Poconos. With less than 1,000 miles, I was still learning the Prime systems but I also noticed the locals were 'casual' about speed limits even driving through the grounded clouds. The Tennessee drivers on I-75 between Chattanooga and Knoxville are also 'casual' about the speed limits regardless of the permanent fog stretch around the Hiwassee river:
    [​IMG]

    Bob Wilson
     
    #6 bwilson4web, Jul 11, 2017
    Last edited: Jul 11, 2017
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  7. heiwa

    heiwa Active Member

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    This could be why Prof John Kelly of WSU said P610 is "highly refined" transaxle. Thank you for your interesting insight!

    Posted via the PriusChat mobile app.
     
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  8. heiwa

    heiwa Active Member

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    No, the Japanese "Kibono-Shasoku..." in this context is not suggesting the maximum speed should be about 100 km/h, but it is saying that "the ideal/desired vehicle speed" may be about 50-100 km/h...to begin maintaining vehicle speed by setting the radar cruse control...IMHO.

    I am sorry to be picky. It is just that many things can get lost/misunderstood in translation...
     
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  9. bwilson4web

    bwilson4web BMW i3 and Model 3

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    My BMW i3-REx will only allow 85 mph for the dynamic cruise control and the top speed is limited to 94 mph. Several times, I've set the Prime dynamic cruise control to speeds higher than 85 mph but not let the car continue accelerate. I have verified the top speed is ~100 mph.

    Bob Wilson
     
  10. CoastRider

    CoastRider Active Member

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    Don't want to get off-topic from Bob's post, but here in the big city (LA County) it is absolutely crazy on our freeways. And most city streets too. A total disregard for the speed limits and traffic laws. It can be very stressful and takes all the enjoyment out of driving.

    You steer clear of the freeways, Mendel. So do you ever take any long trips in your Prius? I'm cutting down my driving significantly. So have many retired people I know. I'm only 64, but it's just not fun anymore (around here).

    Quiet is GOOD at any speed. It's nice to know they are making the Prime quieter. My '16 regular Prius, not so much.
     
    #10 CoastRider, Jul 14, 2017
    Last edited: Jul 14, 2017
  11. Mendel Leisk

    Mendel Leisk Senior Member

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    Traffic rules are largely disregarded here too. People roll stop signs and turn right on red lights with hardly hesitating, speed limits are virtually acknowledged as minimums. Tailgating and aggressive lane serving witnessed at least once per outing. It's not always bad, but when it is..,

    We got up the coast to Powell River a week back, but mostly just local driving. Starting to think about a carless future. Cheaper and safer for sure.
     
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  12. CoastRider

    CoastRider Active Member

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    Well said. I witness all the same, daily. Excessive speed, overly-aggressive driving, and distracted driving (cell phone use) is totally out of control. Even with new laws in California, drivers just ignore it. We need a Prius Chat psychologist, or sociologist, to explain to us why some people become raving lunatics when they get behind the wheel of a vehicle. :mad: It empowers them in some weird way? They know no fear. And don't care who's life they endanger or what laws they break.

    (OT. Sorry Bob)
     
    #12 CoastRider, Jul 14, 2017
    Last edited: Jul 14, 2017
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  13. NR427

    NR427 Member

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    Utah has some roads with 80 mph limits but 5-10 over any limit seems to be sop.
     
  14. bwilson4web

    bwilson4web BMW i3 and Model 3

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    No problem about thread drift. It is the pleasant quiet at speed and if others might have noticed. If not, I'll have get checked for a hearing aid.

    Bob Wilson
     
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  15. ems2158

    ems2158 Active Member

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    Back on topic. We traded a 2013 Prius v for the Prime. The v was unbearable over 75 mph. The Prime is much quieter but still is not a great highway cruiser compared to our 2016 Impala. You have to sacrifice something to get over 50 mpg.
     
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  16. CoastRider

    CoastRider Active Member

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    I'm going to ask if I can rent a Prime for the day, and see how much difference there is between my old-fashioned '16 non PiP, and the new Prime. Very interested in experiencing that quietness.
     
  17. NR427

    NR427 Member

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    I've driven both and the prime is quieter in ev but I would say they are the same in hybrid mode.
     
  18. ETC(SS)

    ETC(SS) The OTHER One Percenter.....

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    iHEAR TEST | iHear Medical

    FDA approved home hearing test......just in case the ACA goes the way of the Apatosaurus.

    I was thinking the same thing.

    I think that driving the BMW has caused Bob to drift over to the dark side a little. ;)
     
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  19. bwilson4web

    bwilson4web BMW i3 and Model 3

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    So yesterday I drove the Prime to eat lunch at City Cafe ... in Decatur. After 28 miles, the car switched to HV mode and it was a very pleasant drive. I was able to confirm dynamic cruise control is quite happy to see speeds over 90 mph set. Just too much traffic of the constabulary kind around but +80 mph worked.

    This morning, I took the BMW and drove all EV over and back to City Cafe doing the big loop, 68 miles with 12 miles EV left over. On the route back, I took the S. River Road route, a little more scenic route and with more modest speeds.

    Bob Wilson
     
  20. alexcue

    alexcue Active Member

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    Funny just this morning I sped up to 92 on the 210 HOV lane to get some jerk who was tailgating me off my back when I was only doing 76 mph. It got noisier but I was more interested in how planted the car seemed. Next time I get up to that speed in UT or TX, which I have in other vehicles ... (And it's very exhausting on I-10 between San Antonio and El Paso, keeping up at that speed. Things happen a lot quicker.) I'll check the noise level. ;)