Page 1 of 2 12 LastLast
Results 1 to 10 of 15

Thread: PCV Delete

  1. #1
    Senior Member mitsumi's Avatar
    Join Date
    May 2015
    Location
    Manila
    Country
    Philippines
    Posts
    1,241
    Thanks
    766
    Thanked 467 Times in 287 Posts

    PCV Delete

    how true is this? does this help? i also saw some do this with their mirage.




        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage GLS 1.2 manual: 3,108.4 mpg (US) ... 1,321.5 km/L ... 0.1 L/100 km ... 3,733.0 mpg (Imp)


  2. #2
    Moderator Eggman's Avatar
    Join Date
    Sep 2015
    Location
    Cleveland, Ohio
    Country
    United States
    Posts
    10,156
    Thanks
    4,039
    Thanked 2,788 Times in 2,107 Posts
    Such a modification would be considered illegal in some jurisdictions.

    Interesting that enthusiasts think they know better than professional engineers.

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 manual: 49.6 mpg (US) ... 21.1 km/L ... 4.7 L/100 km ... 59.5 mpg (Imp)


  3. The Following User Says Thank You to Eggman For This Useful Post:

    mitsumi (11-26-2018)

  4. #3
    Still Plays With Cars Loren's Avatar
    Join Date
    May 2018
    Location
    Florida
    Country
    United States
    Posts
    1,225
    Thanks
    324
    Thanked 936 Times in 539 Posts
    If you had a really old engine with worn out rings that was allowing a LOT of blowby to occur, then this would almost make sense.

    In a nutshell, if your engine isn't burning a lot of oil and blowing smoke out the tailpipe... don't do this.
    Simplify and add lightness.

  5. The Following User Says Thank You to Loren For This Useful Post:

    mitsumi (11-26-2018)

  6. #4
    Senior Member
    Join Date
    Mar 2016
    Location
    mn
    Country
    United States
    Posts
    111
    Thanks
    702
    Thanked 51 Times in 38 Posts
    Quote Originally Posted by mitsumi View Post
    how true is this? does this help? i also saw some do this with their mirage.
    Spot on up to 1:39 pure B.S. after that

  7. #5
    Senior Member Alex1a1f's Avatar
    Join Date
    May 2016
    Location
    Portland, Oregon
    Country
    United States
    Posts
    1,541
    Thanks
    754
    Thanked 926 Times in 520 Posts
    Quote Originally Posted by Eggman View Post
    Such a modification would be considered illegal in some jurisdictions.

    Interesting that enthusiasts think they know better than professional engineers.
    Right? I always think the same when seeing things like this. :-)
    (blank signature)

  8. #6
    Senior Member daleWV's Avatar
    Join Date
    Jun 2015
    Location
    WV
    Country
    United States
    Posts
    190
    Thanks
    292
    Thanked 147 Times in 91 Posts
    I'm afraid that is a good way to fill your engine with sludge. Don't do it. In the old days before PCV systems existed, engines had a large vent pipe from the crankcase that extended down below the engine into the airstream created below the car while driving down the highway. The pipe was cut in a manner that the airstream passing by the end of the pipe would create a small vacuum and help draw the unburnt crankcase blow-by fumes out of the engine. This delete doesn't even provide that.
    Last edited by daleWV; 11-26-2018 at 02:02 AM.

  9. The Following User Says Thank You to daleWV For This Useful Post:

    mitsumi (11-26-2018)

  10. #7
    Moderator Eggman's Avatar
    Join Date
    Sep 2015
    Location
    Cleveland, Ohio
    Country
    United States
    Posts
    10,156
    Thanks
    4,039
    Thanked 2,788 Times in 2,107 Posts
    Did anyone read the comments to the video? It was pointed out that the author of the video didn't really delete the Positive Crankcase Ventilation valve, but only disconnected the air intake tube. The PCV valve would still be in place, despite his claims.

    Wow this guy is misinformed. This is a fine example of someone who doesn't know what they are doing, tells others misinformation, and others take his advice as if they are doing something good. Just because someone does it and brags about his skills on YouTube, doesn't mean it's a good idea to replicate.

    The contamination on his intake tube that he deleted was likely caused by insufficient filtration. I'm guessing it's from an 'improved' aftermarket air intake filter.

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 manual: 49.6 mpg (US) ... 21.1 km/L ... 4.7 L/100 km ... 59.5 mpg (Imp)


  11. The Following User Says Thank You to Eggman For This Useful Post:

    mitsumi (11-26-2018)

  12. #8
    Senior Member stevedmc's Avatar
    Join Date
    Dec 2015
    Location
    Baton Rouge
    Country
    United States
    Posts
    758
    Thanks
    7
    Thanked 288 Times in 193 Posts
    Quote Originally Posted by Eggman View Post
    Interesting that enthusiasts think they know better than professional engineers.
    I've been saying those exact words for quite some time now.

  13. #9
    Senior Member Cobrajet's Avatar
    Join Date
    May 2015
    Location
    Olympia, WA
    Country
    United States
    Posts
    3,126
    Thanks
    1,197
    Thanked 1,848 Times in 1,101 Posts
    What is the point of doing this?

  14. #10
    Moderator inuvik's Avatar
    Join Date
    May 2015
    Location
    Coos Bay, OR
    Country
    United States
    Posts
    3,835
    Thanks
    4,761
    Thanked 1,562 Times in 1,120 Posts
    Quote Originally Posted by Cobrajet View Post
    What is the point of doing this?
    Because I'm sure that mod was worth another 10HP, he just needs a couple of stickers to really pump up the performance.


        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 automatic: 40.5 mpg (US) ... 17.2 km/L ... 5.8 L/100 km ... 48.6 mpg (Imp)


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •