Page 6 of 19 FirstFirst ... 2345678910 ... LastLast
Results 101 to 120 of 370

PCV/Catch Can/Crank Pressure

This is a discussion on PCV/Catch Can/Crank Pressure within the GTO forums, part of the Vehicle Specific category; the one I use have a breather in the top ,bought it at jegs here is one similar to it ...

  1. #101
    Senior Member qwkgto's Avatar
    Join Date
    Mar 2008
    Location
    OHIO"S only 9 second GTO
    Posts
    1,464

    Phantom Black Metalic
    2005 GTO

    the one I use have a breather in the top ,bought it at jegs here is one similar to it but without the vented top RCI704D,Item# 821-7040D $17.99 the one with the vented top I use is alil more but I need the vented one for the FI,they work great, comes with mounting slots and if you get the one like I have has a AN fitting in the side as well as pitcock in the bottom for the drain.

  2. #102
    Member devil6rr's Avatar
    Join Date
    Oct 2008
    Location
    NJ
    Posts
    440

    SOM / NBM
    2002 Pro Z28/2001 TurboTA

    Quick question, would the catch can stop the oil from spitting out of my breather? i currently have one breather where the oil fill cap goes. The driver side valve cover is still blocked from the factory? should i open this up and how ?

    thanks

    Procharged 8psi D1
    (112K miles)

  3. #103
    Smiles for 9.5 Years cammed goat's Avatar
    Join Date
    Jan 2009
    Location
    Paterson/Ridgewood, NJ
    Posts
    11,474

    Phantom Black Metallic
    2004 GTO M6

    I think I will be purchasing one once my income taxes get here. I read about the advantages in this month's issue of GMHTP. Good write up.


    extreme dimensions, driveshaft shop, harrop, hid(35watt/6k) lows, hurst, k&n, led fogs, maverick man, mishimoto, nitto, revshift, slp, stern st-1, smoked sidemarkers, whiteline poly radius rod bushings

  4. #104
    Member pmolina0436's Avatar
    Join Date
    Jul 2008
    Location
    Texas
    Posts
    528

    Black
    2004 GTO

    Quote Originally Posted by Sarge View Post
    Back in the day...around 1966 BTH ( Before Tree Huggers) for me anyway, when I was starting to wrench .....pollution control wasn't a consideration. Nor was gas mileage. Pretty much we just sat around thinking of how to go fast and get laid. Yup...that was pretty much it. Today lots of things has changed. We still want to go fast and get laid....but the internal combustion engine has become so efficient and regulated we have had to learn new "tricks" to enable us to go fast within the confines of the new regulated pollution control engineering restrictions laid on us gearheads. Now before anybody jumps up and calls me a polluter let me just say a tuned high performance engine today is a 1000 times less a polluter than the old engines of yesteryear. As we modify todays engines...yes we will vent crank gases to the atmosphere....but it is so insignificant it hardly can be argued we are polluting. So blow me I am in a foul mood anyway as that damn spotted owl I had for breakfast is making me fart something fierce. So blow me in advance.
    OK...I'll start at the start.
    The internal combustion engine basics hasn't changed hardly at all since the first one was fired up over a 100 years ago. Piston goes up and down and valves open....fuel is mixed with air....a spark occurs and kaboom...you got power. We all know the air/fuel is compressed by the piston going up in the cylinder...and that is cool....I'm going to speak to the piston going down the cylinder.....that very action produces pressure back into the crank. With back pressure all kinds of things happen. None of them good. Your oil gets polluted with fuel and burnt gases from the blow-by past the rings.....anybody don't think any blow by gets past your rings is fooling themselves. This is where oil sludge came from back in the day that gets blamed on Pennzoil It wasn't the oil it was the fuel/burnt gases causing the oil to break down and sludge folks. Also these old engines leaked oil like a son of a bitch as the crank pressure would find the easiest route out of the engine...and that was usually around any gasket or seal So the rocket scientist designed what we used to call drop lines from the crank (usually the valve covers)...these were 3/8"-1/2" rubber hose that ran from the valve covers and hung down below the car. The idea was the air passing under the car would create a vacuum and draw out the crank gases and allow pressure an escape route versus out your rear main seal These hoses would get clogged up with bugs and stuff and you would have to blow them out or your entire car would smell like gas/oil.....My girlfriend back then would suck them out for me as she could suck start a diesel truck and that worked out well for both of us...I digress......
    Well folks started dropping dead on the sidewalks of Los Angelas and the tree huggers union was formed. They raised hell beat pots and pans together and sacrificed chickens...so the rocket scientist come up with what we know today as the PCV. That would be Positive Crankcase Ventilation. They now routed the vent hose back into the carburetor. Brilliant! Guess what? When you do that you have one helluva drop in power. Why? Pay attention here.....because now you have oil/burnt gases being mixed with fresh air/fuel....and that causes significant detonation as your air/fuel mix is now diluted...so to fix that you have to pull a shitload of timing (where your plug fires in relation to the location of your piston to top dead center).....and this of course significantly reduced the amount of hydrocarbons being vented into the atmosphere as the gases were now being burnt twice.....problem with this is where does the crank pressure go? Well....it seeped out the intake manifold...the rear main seal...every gasket you could think of....talk to any "old guy" and he will confirm we leaked oil like Paris Hilton dropping money on Rodeo Drive. So the rocket scientist went back and created the "Smog Pump"...WTF is a smog pump you ask? Well some where mechanical and some were electrical...but both did the same thing....they "sucked" the air out of the crank like a vacuum cleaner and routed it back into the carburetor. Brilliant! Look at the horsepower drop around the early 70's across the board. This is why. Of course we stripped all this shit off But now days you cant do that shit...so here we are. Huge changes has occurred in the pollution control devices/methodologies since the early 70's....but the basics haven't changed all that much.....a new 2007 LSX motor is routing crankcase burnt gasses/oil back into the intake and here is where I'll get started on our LS1's and 2's specific. I know I blew by the above but hopefully the history will help a fella understand what it is we are doing here and why.
    Well the first thing a guy can realize is by getting the oil mist out of his/her air/fuel is a good thing as todays LSX ECM will pull timing if the knock retard sensors go off. So from the factory they have calibrated the tune to compensate for this oil mist/burnt gases being re-introduced back into the air/fuel mixture. So when you go get a custom tune the tuner can only give you so much timing ( closer to top dead center the more you compress your mixture the more power you make) without getting the dreaded knock sensor going off and instantly reducing timing and you go slow again.....so you have to eliminate the oil mist and then your tuner can give you more timing and not set off the knock retard sensors Brilliant. How do I do that? Oil Catch can. On our LSX motors the rocket scientist have developed a PCV through our valley tray. It is routed up to the intake throttle body. OK. Well a oil catch can separates oil mist from the air and then re-introduces a much cleaner air back into the throttle body. Looks like this.
    From the bottom of the valley cover up to the top of the catch can...filtered through the wire mesh stuff.....clean air back into the throttle body...
    Click for full size
    Yeah for us....well we are not finished yet. We need to plug the PCV...or some call it a PCV delete as we don't want to re-introduce the burnt gases back into our air/fuel mixture. OK plug the passenger side vent that was re-introducing these burnt gases back into the air/fuel....here it is capped off on my GTO...see it right there with the black cap....
    Click for full size
    Brilliant! Wait a minute...I gotta vent all that crankcase pressure or my rings ain't gonna seal right and I'll be leaking oil everywhere......so lots of guys just vent via a cheap oil breather cap......like this one....
    http://www.pfyc.com/pc/GN3020/GNUNDE...er+Filter.html
    And you can see I have one on the passenger side valve cover....this is good for most LSX engines with some mods....as you go up the horsepower ladder this one vent cannot handle all the crank pressure....lot of you nitrous and forced induction folks can attest to blowing the dipstick out and spraying down your motor with oil can't you This is caused by too much crank pressure.... so many vent the other side as well.....and this is all good for I would say up to 600'ish RWHP. Now this pressure will come with some oil mist also. The passenger side oil cap breather I have does pool some oil down in the neck but has never came past the filter part. As for venting the other side (drivers side) for some additional venting capability GM was nice enough to provide us with a capped off ready made solution....it comes capped from the factory at the rear of the drivers side valve cover....here it is...now in this picture I already have my vent hose on it....but you will see a black rubber cap on yours...
    Click for full size
    Some folks just put a little 3/8" KN type filter ( I get them at AutoZone for about $7 bucks) on there with a 3/8" hose splice and they are done. But I am a not enamored with wiping up oil mist off my engine and have installed an in-line oil/air separator I got from Home Depot for like $8 bucks. This allows the pressure to escape and I catch any oil before it vents into the engine bay. Here is the setup.
    Click for full size
    Click for full size
    I just drilled two little 1/4" holes in the rain drain lip there and tie wrapped the setup....it ain't going anywhere and looks good.
    So now you are catching the oil in your catch can. You are venting your crank pressure out. You have plugged your PCV. You can make more power...not be fouling plugs....not coating your intake and throttle body with oil....all good things.....
    Once you pass 600+RWHP you will need to start looking at vacuum pumps....but this solution is clean/cheap/easy and makes it possible for your tuner to get aggressive without setting off knock sensors....your getting the crap out of your crankcase and oil so your engine runs cleaner....your relieving pressure so you instantly are reducing resistance to your pistons coming down (quicker revs gets you into your power band quicker) so you go faster. Quick=Fast.
    I don't know if any of this helps anybody at all....but there is my humble take on the subject. Feel free to challenge/discuss/ask....I've been married so long I have no ego left.
    Click for full size
    Great info..Well what if the valley tray doesnt have that vacume/stick thing coming out of it??

  5. #105
    TJEA Retirement Home Dr.Crash's Avatar
    Join Date
    Feb 2006
    Location
    U. S And A Greatest country in all of world
    Posts
    3,383

    Stock
    2002 Camaro

    Quote Originally Posted by pmolina0436 View Post
    Great info..Well what if the valley tray doesnt have that vacume/stick thing coming out of it??
    you can get a LS6 valley cover for like $68 shipped from gmpartsdirect. pretty easy swap, installuniversity or ls1howto has the write up

  6. #106
    Member pmolina0436's Avatar
    Join Date
    Jul 2008
    Location
    Texas
    Posts
    528

    Black
    2004 GTO

    Quote Originally Posted by Dr.Crash View Post
    you can get a LS6 valley cover for like $68 shipped from gmpartsdirect. pretty easy swap, installuniversity or ls1howto has the write up
    do i need on?? The thing is cause my oringinal valley had a little leak on it so me and some freinds replaced it with a valley that doesnt have that stick thing on it..So do i need one??

  7. #107
    I flame retards CamaroFan71's Avatar
    Join Date
    Aug 2006
    Location
    Baton Rouge, La.
    Posts
    1,068

    QuickSilverMetallic
    2005 GTO M6

    I saw on another site that someone did a write up about plugging all the PCV lines and putting a breather filter in the valve cover. Is this all there is to it? Or is the catch can a must have??

  8. #108
    Member fxgs's Avatar
    Join Date
    Mar 2007
    Location
    Camp Hill, Pa
    Posts
    719

    Onyx Black
    2002 SLP Camaro SS

    I pulled off all the PCV hoses, capped off where all the hoses led to (really helped to clean up the engine bay) and ran a breather on the passenger side valve cover AND another one off the rear drivers side where the PCV system originated.

  9. #109
    King 0f n00bz shady milkman's Avatar
    Join Date
    Jan 2006
    Location
    Shepherd, Michigan
    Age
    29
    Posts
    11,775

    blacker than wesleysnipes
    98' trans am


  10. #110
    Veteran Hi-Po's Avatar
    Join Date
    Nov 2005
    Location
    Florida
    Posts
    10,461

    Black
    1999 TA WS.6

    Quote Originally Posted by pmolina0436 View Post
    Great info..Well what if the valley tray doesnt have that vacume/stick thing coming out of it??
    Quote Originally Posted by Dr.Crash View Post
    you can get a LS6 valley cover for like $68 shipped from gmpartsdirect. pretty easy swap, installuniversity or ls1howto has the write up
    This is exactly what I want to know. I dont care about the install, hell been in ther almost 10 times now. Can have that intake off in about 3 beers. I just dont want to buy the LS6 Valley cover. How would one go about doing this write up and not buy the LS6 valley cover? I need a catch can setup ASAP.

  11. #111
    King 0f n00bz shady milkman's Avatar
    Join Date
    Jan 2006
    Location
    Shepherd, Michigan
    Age
    29
    Posts
    11,775

    blacker than wesleysnipes
    98' trans am

    Quote Originally Posted by Hi-Po View Post
    This is exactly what I want to know. I dont care about the install, hell been in ther almost 10 times now. Can have that intake off in about 3 beers. I just dont want to buy the LS6 Valley cover. How would one go about doing this write up and not buy the LS6 valley cover? I need a catch can setup ASAP.
    hold tight

  12. #112
    King 0f n00bz shady milkman's Avatar
    Join Date
    Jan 2006
    Location
    Shepherd, Michigan
    Age
    29
    Posts
    11,775

    blacker than wesleysnipes
    98' trans am

    ls6 valley cover V


    with ls1 style pcv V


  13. #113
    TJEA Retirement Home Dr.Crash's Avatar
    Join Date
    Feb 2006
    Location
    U. S And A Greatest country in all of world
    Posts
    3,383

    Stock
    2002 Camaro

    Quote Originally Posted by Hi-Po View Post
    This is exactly what I want to know. I dont care about the install, hell been in ther almost 10 times now. Can have that intake off in about 3 beers. I just dont want to buy the LS6 Valley cover. How would one go about doing this write up and not buy the LS6 valley cover? I need a catch can setup ASAP.
    ya im not really sure. i've heard of people just running the catch can off of the (stock) pcv system, but i have heard it doesnt work as well.

  14. #114
    TJEA Retirement Home Dr.Crash's Avatar
    Join Date
    Feb 2006
    Location
    U. S And A Greatest country in all of world
    Posts
    3,383

    Stock
    2002 Camaro

    Quote Originally Posted by shady milkman View Post
    ls6 valley cover V
    Click for full size

    with ls1 style pcv V

    Click for full size
    pics?

  15. #115
    King 0f n00bz shady milkman's Avatar
    Join Date
    Jan 2006
    Location
    Shepherd, Michigan
    Age
    29
    Posts
    11,775

    blacker than wesleysnipes
    98' trans am

    Quote Originally Posted by Dr.Crash View Post
    pics?
    huh?? i see them....are you at work ?

  16. #116
    TJEA Retirement Home Dr.Crash's Avatar
    Join Date
    Feb 2006
    Location
    U. S And A Greatest country in all of world
    Posts
    3,383

    Stock
    2002 Camaro

    Quote Originally Posted by shady milkman View Post
    huh?? i see them....are you at work ?
    ya

  17. #117
    King 0f n00bz shady milkman's Avatar
    Join Date
    Jan 2006
    Location
    Shepherd, Michigan
    Age
    29
    Posts
    11,775

    blacker than wesleysnipes
    98' trans am

    Quote Originally Posted by Dr.Crash View Post
    ya im not really sure. i've heard of people just running the catch can off of the (stock) pcv system, but i have heard it doesnt work as well.
    you do run it off of the stock pcv system..but were people get mixed up at is where the dirty and the clean side go to

  18. #118
    TJEA Retirement Home Dr.Crash's Avatar
    Join Date
    Feb 2006
    Location
    U. S And A Greatest country in all of world
    Posts
    3,383

    Stock
    2002 Camaro

    Quote Originally Posted by shady milkman View Post
    you do run it off of the stock pcv system..but were people get mixed up at is where the dirty and the clean side go to
    see thats what iwas confused on so i just bought a LS6 valley cover and set it up like sarge had it

  19. #119
    King 0f n00bz shady milkman's Avatar
    Join Date
    Jan 2006
    Location
    Shepherd, Michigan
    Age
    29
    Posts
    11,775

    blacker than wesleysnipes
    98' trans am

    Quote Originally Posted by Dr.Crash View Post
    ya
    they are photobucket'd so you will see them when you get home..or go to hidemyass.com(seriously) or type in 206.251.77.82 ..and type in ls1.com then you can see the pics

  20. #120
    King 0f n00bz shady milkman's Avatar
    Join Date
    Jan 2006
    Location
    Shepherd, Michigan
    Age
    29
    Posts
    11,775

    blacker than wesleysnipes
    98' trans am

    the clean side(passanger) does not touch the catch can..note the name clean side..so that gets routed bakc into the tb...the dirty side goes to the catch can..so instead of going into your intake fitting..the pcv goes to the top fitting of the can..and then the side fitting of the can goes into the intake fitting..so the dirty gets filtered to clean air and goes back into the manifold

Page 6 of 19 FirstFirst ... 2345678910 ... LastLast

LinkBacks (?)

  1. 02-13-2017, 02:04 PM
  2. 10-07-2016, 03:32 PM
  3. 04-26-2016, 05:35 AM
  4. 03-02-2015, 10:11 PM
  5. 06-14-2014, 07:04 PM
  6. 03-24-2014, 10:00 PM
  7. 01-09-2014, 08:18 PM
  8. 11-21-2013, 09:35 AM
  9. 08-13-2013, 05:55 PM
  10. 08-13-2013, 12:37 PM
  11. 10-22-2012, 12:55 AM
  12. 03-22-2012, 11:47 AM
  13. 11-10-2011, 06:49 PM
  14. 10-17-2011, 02:29 PM
  15. 10-17-2011, 10:33 AM
  16. 10-03-2011, 06:14 AM
  17. 09-05-2011, 01:58 AM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. PCV Catch Can
    By Orcus79 in forum Internal Engine
    Replies: 4
    Last Post: 08-24-2013, 02:17 PM
  2. C6 Corvette Catch Can - Catch Me If You Can
    By Ed Blown Vert in forum Corvette
    Replies: 0
    Last Post: 07-29-2009, 03:00 AM
  3. Replies: 3
    Last Post: 04-01-2006, 04:59 PM
  4. Looking for gauges! nitrous pressure, fuel pressure!
    By texasss in forum Parts Wanted / Trade
    Replies: 2
    Last Post: 10-29-2005, 10:05 AM

Bookmarks

Posting Permissions

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