50% MPG increase

Discussion in 'Gen 3 Prius Fuel Economy' started by JoseRob, Apr 3, 2021.

  1. chronon

    chronon Active Member

    Joined:
    Jun 14, 2007
    533
    86
    3
    Location:
    here and there aint be in frozen wasteland no mo..
    Vehicle:
    2005 Prius
    Model:
    ----USA----
    when i was in the engine area of my 05 around that injector rail .. i added some cork layer above the rail .. this traps a tiny amount of heat onto the incoming fuel .. not sure how much but it is closer to fuel vaporization and there is a small increase in mpg at least 1%.
     
  2. Grit

    Grit Senior Member

    Joined:
    Aug 22, 2017
    4,568
    3,382
    1
    Location:
    Wilkes Land
    Vehicle:
    2012 Prius
    Model:
    Four
    o_O
     
  3. sam spade 2

    sam spade 2 Senior Member

    Joined:
    Mar 31, 2018
    4,825
    1,980
    0
    Location:
    USA
    Vehicle:
    2017 Prius c
    Model:
    Four
    You have that theory all backwards.
    Pre-heating the incoming fuel is NOT a good idea......unless it is winter in Alaska.
    Seriously.
    Designers take great pains to keep the incoming fuel from getting TOO hot.
    You should NOT defeat those design efforts.
     
  4. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    11,775
    8,513
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    There's another option here that we've used on PriusChat before, and it has the advantage that we really learn something about how much the injector replacement really accomplished. It works like this:

    1. Somebody who has just replaced the injectors sends the old ones to a service that tests, fully restores, and re-tests them.
    2. In the past, I paid the testing and restoration charges, and had the restored old injectors sent to me.
    3. We get the before test results, showing how much of a problem they really were or weren't causing for the car they came out of, and the after test results, confirming the restoration.
    4. The next person thinking of replacing injectors pays my cost and postage, puts the restored ones in, sends the old ones to the service.
    5. lather, rinse, repeat.

    It's useful to learn the condition of the old injectors. For example, we had one member, astrolink, who sent the old ones in and the test clearly showed they were awful, and of course the replacement solved the trouble with astrolink's car and there was no question about it.

    On the other hand, I replaced a set and sent my old ones in and they were just fine, which was useful to know; in case I was hunting down an issue with the car, it would help to know I hadn't found it yet. :)

    The restoration cost at the time was $20 per injector, plus postage, and that hasn't changed on Rich's web site, and it doesn't look like Rock Auto can beat that by much, if at all ... and from Rock Auto we don't get the test results.

    As far as I know, we don't have a set of Gen 3 injectors in this rotation yet. (I still have the last set of Gen 1 / Gen 2 injectors available, but Gen 3 uses different ones).

    If the OP in this thread still has the ones that came out of the car and they're not mangled, that would be a good opportunity to start up a rotation for those.

    It would apparently take three such rotations to cover all of Gen 3 and 4: it's one part number for 2010 and 2011, another for 2012+ and Prius v, and at least one more number in Gen 4.
     
  5. MarsMan

    MarsMan Junior Member

    Joined:
    Sep 3, 2015
    34
    12
    0
    Location:
    Torrance, Ca
    Vehicle:
    2010 Prius
    Model:
    III
    Th
    Yeah, Ill gladly try that out. any site you recommend? Im in LA area if that matters.

    Ill get a cheaper 3rd party set for now to send my stock ones out and then swap those back in when they are serviced.

    One more question, about coil packs, should they only be replaced with a failure or should I replace them 2010 @150k
     
  6. farmecologist

    farmecologist Senior Member

    Joined:
    Jun 25, 2015
    1,356
    1,315
    0
    Location:
    Southern MN
    Vehicle:
    2010 Prius
    Model:
    II

    Are injectors easy to replace? I've replaced quite a few things on our 2012 v (wagon)...and I might just go ahead and replace the injectors for 'fun'. (y) The v is my project car after all...
     
  7. chronon

    chronon Active Member

    Joined:
    Jun 14, 2007
    533
    86
    3
    Location:
    here and there aint be in frozen wasteland no mo..
    Vehicle:
    2005 Prius
    Model:
    ----USA----
    .... Come 'on man ? ! ... We're not talking exh. temps .. or even coolant temps .. just a little cabin heat extra few calories its probably very miniscule but ice cold gas es no bueno .. yeah we all heard about the 'vapor lock' issues in the past ... for carb machines .. i guess this could go to a whole nother site called mpg.com ...
     
  8. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    11,775
    8,513
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    Well, the service we were using in the PriusChat-traveling-injectors scheme was Cruzin Performance in Michigan, but if you're looking for a nearby service to have the restored injectors returned to you, there are probably plenty closer to you. Maybe check with the folks in this article? They're in Torrance. (I just checked with Rich at Cruzin and right at the moment his hands are full with something else anyway.)
     
  9. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    11,775
    8,513
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    Well ... they're not hard to replace ... but judging by the test outcomes in the Gen 1 / Gen 2 rotation we had earlier, you had about a 67% chance of putting in that time and money to replace four injectors that were just fine to begin with.

    They definitely can go bad, as we saw in astrolink's case, and they were making that car run so badly he was about to get rid of it. So yes, worth checking if there's a reason for suspicion. But as 3prongpaul put it:

    So there might not be much call for replacing them "for 'fun'", unless just spending that time and money really would be 'fun' for you. :)
     
  10. MarsMan

    MarsMan Junior Member

    Joined:
    Sep 3, 2015
    34
    12
    0
    Location:
    Torrance, Ca
    Vehicle:
    2010 Prius
    Model:
    III
    LOL IM in Torrance, that works. I just say LA area cause most people haven't heard of Torrance.
    Perfect I am in Torrance and will check with them out.

    Looks like they are a couple blocks from my work, I can just ride my bicycle to work and drop em off. Awesome!! I bike in 2 or 3 days a week anyways I only live 3 miles from work.
     
  11. JoseRob

    JoseRob Junior Member

    Joined:
    May 18, 2019
    14
    19
    0
    Location:
    Long beach
    Vehicle:
    2011 Prius
    Model:
    Three
    I'm in Long Beach now but originally from Torrance area. If you need help with it just give me a holler, it was reasonably simple although I did forget to plug something in and when I turned on the car the engine went crazy with misfires. I can send over the video I used from Sane Auto on YouTube that walked me through it.
    Posted via the PriusChat mobile app.
     
  12. sam spade 2

    sam spade 2 Senior Member

    Joined:
    Mar 31, 2018
    4,825
    1,980
    0
    Location:
    USA
    Vehicle:
    2017 Prius c
    Model:
    Four
    Come on yourself.
    What I said is TRUE.
    You did this under the hood, not in the cabin.......so you don't really know HOW hot that fuel rail might be getting.
    This is NOT a good idea.
     
  13. chronon

    chronon Active Member

    Joined:
    Jun 14, 2007
    533
    86
    3
    Location:
    here and there aint be in frozen wasteland no mo..
    Vehicle:
    2005 Prius
    Model:
    ----USA----
    **sho nuf do know it aint be 2 much ..sheet ...
    it is merely a couple pieces cork zip tied to top of rail .. kamila harris approves if u wear your mask prior to installing .
     
  14. sam spade 2

    sam spade 2 Senior Member

    Joined:
    Mar 31, 2018
    4,825
    1,980
    0
    Location:
    USA
    Vehicle:
    2017 Prius c
    Model:
    Four
    Brilliant.
    :rolleyes:
     
  15. chronon

    chronon Active Member

    Joined:
    Jun 14, 2007
    533
    86
    3
    Location:
    here and there aint be in frozen wasteland no mo..
    Vehicle:
    2005 Prius
    Model:
    ----USA----
    been running it that way far 70k miles .. i would say it has not hurt operation .... and that is in hot southern climate .. u have only to gain more in a colder clime.
     
  16. sam spade 2

    sam spade 2 Senior Member

    Joined:
    Mar 31, 2018
    4,825
    1,980
    0
    Location:
    USA
    Vehicle:
    2017 Prius c
    Model:
    Four
    You just aren't listening.
    Just because YOU got away with doing that does not make it a good idea.
    The next guy who tries it might do it a little differently, overheat the rail, blow a seal and start an engine fire.
    You can do whatever stupid thing you want but it is irresponsible to recommend it to others.
     
  17. Grit

    Grit Senior Member

    Joined:
    Aug 22, 2017
    4,568
    3,382
    1
    Location:
    Wilkes Land
    Vehicle:
    2012 Prius
    Model:
    Four
    are you pandering to a certain demographic of people? If so, it is working!!!
     
  18. chronon

    chronon Active Member

    Joined:
    Jun 14, 2007
    533
    86
    3
    Location:
    here and there aint be in frozen wasteland no mo..
    Vehicle:
    2005 Prius
    Model:
    ----USA----
    u musta not seen the movie 'gashole ' u musta never heard about da pogue carb ..

    blow a seal ? ?? fuel rail seal ? i dont remember telling anybody ' hey u gotta do this' .. i merely mentioned i did it .. it has been working and it made an improvement ..
     
Loading...