1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Tried seemingly everything to increase MPG -- wondering if I need a new battery

Discussion in 'Gen 3 Prius Fuel Economy' started by Mongoose2, Jun 15, 2022.

  1. Paladain55

    Paladain55 Active Member

    Joined:
    Oct 20, 2021
    357
    136
    0
    Location:
    The South
    Vehicle:
    2010 Prius
    Model:
    Two
    Like EGR arguments in theory disc brakes will always drag. It may be 1w worth but thats what im saying here. Some of those guys get crazy with it.

    Drum brakes actually maintain a gap between the pad and the drum and disk brakes dont.
     
  2. ASRDogman

    ASRDogman Senior Member

    Joined:
    May 29, 2018
    5,834
    3,136
    0
    Location:
    Florida
    Vehicle:
    2010 Prius
    Model:
    Two
    Disc brakes do NOT drag. If they are functioning properly. The normal out of round and
    stress from turning pushes the pads back slightly. If they drag, the will get hot, the caliper will
    heat up and expand and the pads will THEN will drag and the vehicle will start to pull, and then
    the brakes fail. Works the same with drum brakes.

    "It may be 1w worth..." I don't understand what that means.
     
  3. Paladain55

    Paladain55 Active Member

    Joined:
    Oct 20, 2021
    357
    136
    0
    Location:
    The South
    Vehicle:
    2010 Prius
    Model:
    Two
    How do you push something without touching it? The pads will always drag man I don't know what to tell you. And if you're talking about the force of a spinning wheel pushing the pads out in that physics experiment they do this is the wrong axis from the pads.


    Watts are btu/hr so meaning the pads are dragging at such a low rate it is producing such little heat that it is almost immeasurable in perfect conditions of disk brakes. But 1w means they will always be touching the pad.

    The pad clips that retract the pads can help but even they typically don't produce a space or gap its just less contact.
     
  4. ASRDogman

    ASRDogman Senior Member

    Joined:
    May 29, 2018
    5,834
    3,136
    0
    Location:
    Florida
    Vehicle:
    2010 Prius
    Model:
    Two
    Sorry you don't understand. I don't know how to explain it any easier....
    But it's time to use the ignore feature for you.
     
  5. Paladain55

    Paladain55 Active Member

    Joined:
    Oct 20, 2021
    357
    136
    0
    Location:
    The South
    Vehicle:
    2010 Prius
    Model:
    Two
    I honestly hope so. I have no idea how to do that and would love that.
     
  6. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,463
    38,101
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    At top/right of page, in the pull-down below your avatar, one item is for ignore. Choose that, then down at bottom is a field to type member you want to ignore.
     
    Paladain55 likes this.
  7. Bill Norton

    Bill Norton Senior Member

    Joined:
    Dec 15, 2012
    1,808
    591
    0
    Location:
    MONW, Ks.
    Vehicle:
    2010 Prius
    Model:
    Five
    Funny, I always read it was the square section O-ring in the caliper that moves the piston back in the caliper when fluid pressure is released. A minute amount.
    And those spring thingie clips at most try to keep the pad close to following the piston.
    I almost always hear the pad making noise when I spin a brake disc.
    You have to get close and have good ears!

    Hey, lets have this a 3 Way Block!
    If we don't, we may drag this on longer than it has already!:whistle:
     
    Paladain55 likes this.
  8. Paladain55

    Paladain55 Active Member

    Joined:
    Oct 20, 2021
    357
    136
    0
    Location:
    The South
    Vehicle:
    2010 Prius
    Model:
    Two
  9. OptimusPriustus

    OptimusPriustus Active Member

    Joined:
    Jul 31, 2021
    308
    130
    1
    Location:
    Finland
    Vehicle:
    2010 Prius
    Model:
    N/A
    Hydraulic bicycle brakes have springs similar to those:) In cars watt or two is meaningless. Except in some dragsters or such where they use drum brakes to have zero drag