Maxed out my own efforts, what is next?

Discussion in 'Gen 3 Prius Fuel Economy' started by Brett., Jun 27, 2012.

  1. Brett.

    Brett. Junior Member

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    Also, I'm pretty sure all gen 3 can go 47 mph before the ICE has to engage as long as you are going down hill. At 42 mph on a flat surface it it turns on.
     
  2. NiHaoMike

    NiHaoMike Member

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    Try going up hills with the HSI at the top of the Eco area, and going down them with the HSI "zeroed out". It's OK to let the car slow down going uphill and speed up going downhill. Don't fight the hills. If you're using the A/C, make sure eco mode is on and only turn it on as much as you need to.

    For such a short commute, a block heater would likely make a big difference. Also, PHEV kits start at 2 grand for the smaller ones.
     
  3. F8L

    F8L Protecting Habitat & AG Lands

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    Thanks! Bestmapman knows what he is talking about. He is one of the expert hypermilers that tests cars along with Wayne.
     
  4. Brett.

    Brett. Junior Member

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    Coasting in neutral | PriusChat

    Link to old thread, has some great info in there

    As I understand it, MG1 can spin up to 10,000 rpms which is around 65 mph without over revving, which is good because I spun it 65 mph once today.

    A funny thing the guy who is in bold talking a bout how neutral is evil. If it's so evil why are all the "experts" using it to get really high mpg figures.

    If there an OEM block heater I can buy for this car? Or is this just a retro fit of something for a similar engine size?
     
  5. qbee42

    qbee42 My other car is a boat

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    You would need one heck of a hill to coast fast enough to cause damage to MG1, but it is theoretically possible. I wouldn't be overly worried, unless you are planning to coast down Pike's Peak.

    Tom
     
  6. markabele

    markabele owner of PiP, then Leaf, then Model 3

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    Experts are only using neutral in the vids because it is easier than showing someone how to feather the pedal to get the same effect in the short amount of time they have with them.
     
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  7. Brett.

    Brett. Junior Member

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    I considered that, but based purely on my own findings, I'm reading 3.5 mpg higher than I could ever muster before by using N instead of "Gliding" at speeds below 55 mph.

    When gliding I am able to go great distances even over bumps with nothing registering on the HSI display with good foot control. There is a noticeable difference between gliding, and coasting.

    I will post back tomorrow after I pick my daughter up, as I will be needing fuel soon. As of tonight, my CONS display reads 62.3 mpg. I'll have the final numbers from this tank to post tomorrow morning.
     
  8. markabele

    markabele owner of PiP, then Leaf, then Model 3

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    I would keep trying to perfect it with your foot since you have some added flexibility that you don't have with simply putting it in N.
     
  9. Brett.

    Brett. Junior Member

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    Alright, I'm home with my results from this tank. Keep in mind I started using N to coast at about 100 miles into the tank or so.

    HSI Display

    [​IMG]

    Can somebody explain this display to me? Are the little cars energy used or generated?

    [​IMG]

    Priors

    [​IMG]

    Overall MPG per tank calculated

    [​IMG]

    Thoughts, opinions, questions, comments?
     
  10. markabele

    markabele owner of PiP, then Leaf, then Model 3

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    Brett,
    You seem set on using N. I really implore you to try to learn to use your foot instead of N. You have to trust us that all the best hypermilers on here don't use N on their Prius.
     
  11. Brett.

    Brett. Junior Member

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    I see that you are at an average of 58.8 mpg in 13 tanks of gas, which is really high but you also live in Nebraska, there are no "flat" roads here in NJ where I live. If I'm not going up a hill, I'm going down one. There are more police out than most other states as well, thus making it difficult to drive with load, or use other techniques which require additional speed to cover the next steep hill.

    The hills I encounter are all steep enough that driving up them at full eco bar the car can only get going 16 mph, if I have a running start, 33 down to 18. This is not conducive to good mpg obviously.

    I've watched the videos with people attempting to hyper mile and read the tutorials on maximizing mpg on these cars, and gliding works well for people with gentle inclines and long flat stretches, or city blocks where it's easy to keep the car in D and blank out the HSI display to roll between close stops.

    As a local comparison, my friend has a gen 2 and averages 42 mpg on the same roads as I'm getting 10 more mpg using all the techniques known. I have excellent pedal control as I've been racing cars and motorcycles for a decade and can keep the HSI display blank even over bumps, but I just could never get over my previous best of 55 mpg. This tank got me 59.51 which is an improvement, if there is some other way to obtain this mpg every tank please do describe it in detail because I am always willing to try something new, or tried and true.
     
  12. markabele

    markabele owner of PiP, then Leaf, then Model 3

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    I get what you are saying....however, I don't think you are going to get a ton of love in this thread when you are basically telling us that we're all wrong and you are right.
     
  13. markabele

    markabele owner of PiP, then Leaf, then Model 3

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    Also...does putting it in N always shut down the ICE or would it keep it going if it was already on?
     
  14. Brett.

    Brett. Junior Member

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    This is just me experimenting, and being happy with results, but I definitely take everything all of you say into consideration. I still glide, but I'd like to hear more about peoples foot work and see results on hilly terrain so I can realize the potential for different methods of savings fuel.

    When the ICE is already on and warming up in the morning, putting it in N leaves the ICE on. (At which time I leave it in D and just glide for that half mile)

    When N is selected any other time I lift my foot completely off the accelerator first, so the ICE shuts off & I watch the instant display reach 100 before I switch. ICE stays off until I switch back into D even if the battery is depleted down to 2 bars at which point it would usually be running.

    For example, in the morning if I switch in N after powering the car on, it will delay the ignition of the ICE until D is chosen.
     
  15. markabele

    markabele owner of PiP, then Leaf, then Model 3

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    From what I understand whatever mode is running before it is put in N simply stays on. Therefore, if the ICE is on before it is put in N, it stays on until put back in D. That being said, the iMPG can still go over 100 even with the ICE being on. So, if I were you, I would think about getting a SGII or Torque to make sure the ICE is off before you switch to N.

    Also, to assume there are no hills in Nebraska is very erroneous. I also believe that some hills are ideal and a 100% flat terrain is not near as perfect some people think it is.

    fwiw well over half my miles on my Prius are on the interstate at an average speed of around 65 with the cruise control on, as well as some with the wife driving (she averages around 45 mpg). Never using N, I can at least get 70 mpg on any round trip anywhere in my city back to home. I hope this doesn't come off as a brag but instead an indicator of what is possible by not having to use N.
     
  16. Skoorbmax

    Skoorbmax Senior Member

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    I've seen him in another video, too. I think honestly he drives like a total idiot. The tricks he applies are worthwhile after the zombie apocalypse when we've run out of gas and our lives depend on MPG. Until then it's obnoxious and really farcical. These tricks should be reserved for a parking lot without traffic; the way he does it is inconsiderate. That complete nonsense he's doing around 11:00 weaving back and forth is frankly dangerous and absurd. Nobody behind him would have any clue what he's playing at.
     
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  17. kdkuhns3

    kdkuhns3 Member

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    I have a nice 2 mile mostly downhill segment on my way home from work, with speed limits from 30-40 mph. After reading this post, I figured i would give N a shot. Right at the spot where I usually start my glide, I popped it in N and left it there for a good mile and a half, until I needed to make my turn off the road, which is on the way uphill, so i don't really need to even brake. Other than that stretch I used my usual techniques throughout my ride. When I got home and powered down. Below are my results. For reference I have been getting between 77 and 82 for this route, so I was surprised to see this outcome. I am not really sure if it is just because of that N glide or if something else contributed to it, but i am sure going to try to duplicate.


    Side note: my trip home is mostly downhill. I only get about 65mpg on the way to work.

    90 mpg.jpg
     
  18. markabele

    markabele owner of PiP, then Leaf, then Model 3

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    Is this your first Prius? If so, I'm guessing you are not gliding right (if that's the cause). Remember, your goal is to see nothing on the HSI.
     
  19. kdkuhns3

    kdkuhns3 Member

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    It is my first. I seem to have days when I can glide very well, and days I just cant find that sweet spot. I keep it with nothing on the HSI. I actually started my glide first, then shifted to N, and I could feel a very noticeable "I'm free" feeling immediately, so clearly I didn't quite have the right pedal position. I guess i will just have to keep practicing.
     
  20. markabele

    markabele owner of PiP, then Leaf, then Model 3

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    Ya, it definitely takes time. To be very honest I thought I couldn't do much better when I started. But my average MPG's have been going up very steadily since I bought it.
     
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