Welcome to Club Hot Rod!  The premier site for everything to do with Hot Rod, Customs, Low Riders, Rat Rods, and more. 

  •  » Members from all over the US and the world!
  •  » Help from all over the world for your questions
  •  » Build logs for you and all members
  •  » Blogs
  •  » Image Gallery
  •  » Many thousands of members and hundreds of thousands of posts! 

YES! I want to register an account for free right now!  p.s.: For registered members this ad will NOT show

 

Thread: crankcase pressure
          
   
   

Reply To Thread
Page 1 of 2 1 2 LastLast
Results 1 to 15 of 23
  1. #1
    HellCaminoKid's Avatar
    HellCaminoKid is offline CHR Member Visit my Photo Gallery
    Join Date
    Mar 2005
    Location
    pittsburgh
    Car Year, Make, Model: 1980 El Camino
    Posts
    96

    crankcase pressure

     



    ok this is really just an annoyance issue that i have....

    1978 4-bolt Chevy 350 bored .060
    flat top pistions w/ 14cc valve reliefs
    64cc cast iron heads 2.02/1.60
    lunati voodoo 60102 cam .468/.489
    performer RPM intake, holley 650 dualfeed
    figured 10.77:1 compression

    i have one open breather on each valve cover but i seem to get way to much pressure because i constantly get oil blowoff coming out of the holes in the bottom of the breather caps... was thinking about running a pcv valve on one if not both valve covers to hopefully eliminate this problem... any suggestions on which valve to use and how to run them?

  2. #2
    gherkin350's Avatar
    gherkin350 is offline CHR Member Visit my Photo Gallery
    Join Date
    Jul 2004
    Location
    Sunny Brisvegas Queensland
    Car Year, Make, Model: 1930 Ford, SBC, Roadster
    Posts
    168

    Lightbulb

     



    This question comes up many times on this forum, the best thing to do is do a SEARCH on this site for
    PCV or Positive crankcase ventilation
    There has been heaps of talk as well as some good pictures.

    Andy
    (still rollin')
    "Those who know not and know not that they know not; are fools, AVOID THEM. Those who know not and know that they know not, are intelligent, EDUCATE THEM".

  3. #3
    DennyW is offline Junior Member Visit my Photo Gallery
    Join Date
    Oct 2004
    Location
    city
    Car Year, Make, Model: catch 22
    Posts
    0

    Heres you a quick view.

    Link for ya:

    http://www.clubhotrod.com/forums/sea...der=descending
    Last edited by DennyW; 03-12-2007 at 09:54 PM.

  4. #4
    gherkin350's Avatar
    gherkin350 is offline CHR Member Visit my Photo Gallery
    Join Date
    Jul 2004
    Location
    Sunny Brisvegas Queensland
    Car Year, Make, Model: 1930 Ford, SBC, Roadster
    Posts
    168

    O.K I tried it myself type in the search area:

    positive crankcase ventilation

    you will find the "good stuff" there

    Andy
    "Those who know not and know not that they know not; are fools, AVOID THEM. Those who know not and know that they know not, are intelligent, EDUCATE THEM".

  5. #5
    thesals's Avatar
    thesals is offline CHR Member Visit my Photo Gallery
    Join Date
    Feb 2004
    Location
    san diego
    Car Year, Make, Model: 66 mustangFB, 69 econline Drag Van
    Posts
    1,528

    pcv it and if you're worried about sucking oil into your system setup an oil catch can
    just because your car is faster, doesn't mean i cant outdrive you... give me a curvy mountain road and i'll beat you any day

  6. #6
    shine's Avatar
    shine is offline CHR Member Visit my Photo Gallery
    Join Date
    Nov 2003
    Location
    bluff dale texas
    Car Year, Make, Model: 47 inderweed
    Posts
    1,029

    you are probably washing down cyclinders by running too fat. try leaning it out a little and put some miles on it. i run moon covers with no holes. pcv is in the intake and a large moon breather on the dr side cove. relieves the pressure without making a mess.
    Attached Images

  7. #7
    shine's Avatar
    shine is offline CHR Member Visit my Photo Gallery
    Join Date
    Nov 2003
    Location
    bluff dale texas
    Car Year, Make, Model: 47 inderweed
    Posts
    1,029

    the pcv
    Attached Images

  8. #8
    R Pope is offline CHR Member Visit my Photo Gallery
    Join Date
    Jun 2005
    Location
    Eston
    Posts
    2,244

    Stock covers have a baffle under the breather hole. Without some baffling, oil will be blown out the breathers.

  9. #9
    C9x's Avatar
    C9x
    C9x is offline CHR Member Visit my Photo Gallery
    Join Date
    Dec 2004
    Location
    N/W Arizona
    Car Year, Make, Model: Deuce Highboy roadster
    Posts
    1,175

    Originally posted by shine
    you are probably washing down cyclinders by running too fat. try leaning it out a little and put some miles on it. i run moon covers with no holes. pcv is in the intake and a large moon breather on the dr side cove. relieves the pressure without making a mess.

    Classy looking engine.

    Doesn't the Moon breather in the PCV system suck in dust?

    Or is there a filter inside?
    C9

  10. #10
    HellCaminoKid's Avatar
    HellCaminoKid is offline CHR Member Visit my Photo Gallery
    Join Date
    Mar 2005
    Location
    pittsburgh
    Car Year, Make, Model: 1980 El Camino
    Posts
    96

    Originally posted by R Pope
    Stock covers have a baffle under the breather hole. Without some baffling, oil will be blown out the breathers.
    there are baffles under the breathers in both covers... the oil comes out like steam and eventually fills the element inside of the breather until it slowly leaks from the holes.

    Shine... nice lookin setup ya got there too

    this is mine a few months ago prior to installation...


  11. #11
    shine's Avatar
    shine is offline CHR Member Visit my Photo Gallery
    Join Date
    Nov 2003
    Location
    bluff dale texas
    Car Year, Make, Model: 47 inderweed
    Posts
    1,029

    i have several of these on the road. no blow by, no leaks from mains. one is going on 5 years and still is dry. no crankcase pressure, no leaks. this is lloyds 41 . 350/200r4/4:11 gears.
    Attached Images

  12. #12
    thebigsy is offline CHR Member Visit my Photo Gallery
    Join Date
    Mar 2005
    Location
    Sydney
    Car Year, Make, Model: 77 Holden Torana
    Posts
    21

    Shine, that motor looks absolutely gorgeous!!
    Where's my keys?!!

  13. #13
    shine's Avatar
    shine is offline CHR Member Visit my Photo Gallery
    Join Date
    Nov 2003
    Location
    bluff dale texas
    Car Year, Make, Model: 47 inderweed
    Posts
    1,029

    the moon breathers have sponge filters in them. i have yet to have any oil come from one. excessive crankcase pressure is comp leaking by the rings usualy due to running rich and washing down cyclinders. i have fixed countless cars by leaning them out. out of the box carbs are notorious for this. i would lean it and change oil and put some serious hwy miles on it to reseat the rings.

  14. #14
    HellCaminoKid's Avatar
    HellCaminoKid is offline CHR Member Visit my Photo Gallery
    Join Date
    Mar 2005
    Location
    pittsburgh
    Car Year, Make, Model: 1980 El Camino
    Posts
    96

    I picked up the stuff to run the pcv so hopefully ill get that accomplished this weekend... i have to switch around some vacuum lines on the carb to run it... there is only one 3/8 vacuum port and right not its running to my brake booster, is it ok to T off of this one or should i just adapt the pcv to fit on one of the smaller ports?

    Shine... i have the edlebrock breathers, they both have some type of sponge inside of them but it doesn't help much... ill try leaning out the carb some too...

    thanx for the help!!

  15. #15
    HellCaminoKid's Avatar
    HellCaminoKid is offline CHR Member Visit my Photo Gallery
    Join Date
    Mar 2005
    Location
    pittsburgh
    Car Year, Make, Model: 1980 El Camino
    Posts
    96

    ok so i checked my oil today... was almost 3 quarts down!!!! PCV goes in this weekend for sure!!!! can't believe its actually building enough pressure to push oil out that bad...funny tho, never any puddles or spots on the ground and no smoke so im not burning it... where the hell is it going???? lol

    also anyone have any input as to what i should do about running that pcv line with only one larger vacuum port? drill/tap a carb spacer... make the line fit to a smaller port which i have open... or maybe even T-off of the brake booster which probably isn't the best idea...

Reply To Thread
Page 1 of 2 1 2 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Links monetized by VigLink