DIY Two Way PCV System How-To (HoMedepoT style)
06-06-2005, 11:58 AM
#21
3.0 BAR
Join Date: Jun 2003
Posts: 1,558
Re: DIY Two Way PCV System How-To (HoMedepoT style)
I dig the exhaust slash kit idea, it'll be interesting to see how well it works.
projekteg- you should hook up a vacuum gauge to see how much the system "sucks"
Here's another thought i had, I don't know if the logic is right, but we'll see what you think.
PCV system wants to vent the crankcase- so under vaccum, the system is being "sucked" by the IM manifold. If you run boost (which you should), the stock system would close the pressure could build up in the crankcase = bad.
Basically, we want to be able to apply vacuum to the crankcase both under boost and under vacuum. Right?
If you run one of these (a vacuum reservoir designed for race cam muscle cars to help with power brakes)
between the PCV valve and the crank case, (with a catch can in-between) you could potentially have vacuum at all times without the exhaust tube. I kinda like this idea better than the exhaust idea since if you end up getting oil sucked into the exhaust, it'll likely burn off and produce the scary blue smoke, in which case you may not be certain where it was from (blowby, stem seals, turbo seals, etc). I'd like to try and avoid any smoke coming from my exhaust.
projekteg- you should hook up a vacuum gauge to see how much the system "sucks"
Here's another thought i had, I don't know if the logic is right, but we'll see what you think.
PCV system wants to vent the crankcase- so under vaccum, the system is being "sucked" by the IM manifold. If you run boost (which you should), the stock system would close the pressure could build up in the crankcase = bad.
Basically, we want to be able to apply vacuum to the crankcase both under boost and under vacuum. Right?
If you run one of these (a vacuum reservoir designed for race cam muscle cars to help with power brakes)
between the PCV valve and the crank case, (with a catch can in-between) you could potentially have vacuum at all times without the exhaust tube. I kinda like this idea better than the exhaust idea since if you end up getting oil sucked into the exhaust, it'll likely burn off and produce the scary blue smoke, in which case you may not be certain where it was from (blowby, stem seals, turbo seals, etc). I'd like to try and avoid any smoke coming from my exhaust.
06-08-2005, 08:49 PM
#22
!! UNCONFIRMED EMAIL !!
Join Date: Dec 2002
Posts: 2,949
Re: DIY Two Way PCV System How-To (HoMedepoT style)
Now can someone Draw a neat diagram of the install on a piece of MS paint paper and explain it, I get about half of what you told me, and the rest I have no clue...I'm a visiual person, and your pictures are sketchy to me...please and thanks.
06-10-2005, 10:04 PM
#23
0.0 BAR
Join Date: Jun 2005
Posts: 2
Re: DIY Two Way PCV System How-To (HoMedepoT style)
I saw this in another toppic on this forrum (don't rmember witch one), why not put your vacum line to the intake before the turbo? it will create the necesary vacum if hooked up whith a 90 degree elbo facing the turbo and the catch can will do the oil separation part. Also if you are not using the stock check valve then you can connect your hose right to the oil pan under the intake (to save you a connection to the stock hose and make it look neater).
06-10-2005, 10:20 PM
#24
1.5 BAR
Join Date: May 2004
Location: Westminster,MD
Posts: 1,032
Re: DIY Two Way PCV System How-To (HoMedepoT style)
Originally Posted by slick01
I saw this in another toppic on this forrum (don't rmember witch one), why not put your vacum line to the intake before the turbo? it will create the necesary vacum if hooked up whith a 90 degree elbo facing the turbo and the catch can will do the oil separation part. Also if you are not using the stock check valve then you can connect your hose right to the oil pan under the intake (to save you a connection to the stock hose and make it look neater).
06-16-2005, 03:17 PM
#25
1.0 BAR
Join Date: Dec 2004
Posts: 551
Re: DIY Two Way PCV System How-To (HoMedepoT style)
Originally Posted by projekteg
i ordered the exhaust slash cut kit, it ended up being like 23 bucks shipped. i'll keep everyone posted on how it works out.
06-26-2005, 09:21 AM
#26
0.0 BAR
Join Date: Feb 2005
Posts: 0
Re: DIY Two Way PCV System How-To (HoMedepoT style)
http://www.fastbygast.com/Catagories...ion/Vacuum.asp
Ever wonder what that buzzing noise was coming from inside a Pro Stocker before they fired up? It's a Pro Stock secret... at least until we told everybody! That noise is coming from an electric vacuum pump. It's purpose is to evacuate the engine cases of unwanted pressures and make the piston rings seal better. The result is my favorite thing... HORSEPOWER! Well... almost my favorite thing.
Features:
Oil-less operation
Permanently lubricated bearings
Built-in cooling fan for constant use
Convenient mounting tabs
Closed housing and motor
Stainless valves and aluminum valve plate
Die cast aluminum head and diaphragm hold down plate
Balanced for smooth, low vibration operation
Long-life diaphragmHelps prevents oil leaks
Cheap money... easy installation... increased horsepower...
Ever wonder what that buzzing noise was coming from inside a Pro Stocker before they fired up? It's a Pro Stock secret... at least until we told everybody! That noise is coming from an electric vacuum pump. It's purpose is to evacuate the engine cases of unwanted pressures and make the piston rings seal better. The result is my favorite thing... HORSEPOWER! Well... almost my favorite thing.
Features:
Oil-less operation
Permanently lubricated bearings
Built-in cooling fan for constant use
Convenient mounting tabs
Closed housing and motor
Stainless valves and aluminum valve plate
Die cast aluminum head and diaphragm hold down plate
Balanced for smooth, low vibration operation
Long-life diaphragmHelps prevents oil leaks
Cheap money... easy installation... increased horsepower...
07-03-2005, 03:43 PM
#27
1.0 BAR
Join Date: Jul 2005
Posts: 231
Re: DIY Two Way PCV System How-To (HoMedepoT style)
nice man ... but let me say whay one of the two ways WILL NOT work !
- so when you're under boost, the PCV valve will close and the system will provide vacuum from the tee line (going to the turbo inlet) - that's OK
- but when you're not under boost, the PCV vavlve will open and the vacuum will become available through the intake manifold ... BUT it will not suck through the catch can, it will suck fresh air from the firlter instead because it's gonna be a lot easier ...
solution: put one-way valve on the tee line as well
- so when you're under boost, the PCV valve will close and the system will provide vacuum from the tee line (going to the turbo inlet) - that's OK
- but when you're not under boost, the PCV vavlve will open and the vacuum will become available through the intake manifold ... BUT it will not suck through the catch can, it will suck fresh air from the firlter instead because it's gonna be a lot easier ...
solution: put one-way valve on the tee line as well
07-03-2005, 06:33 PM
#28
3.0 BAR
Thread Starter
Join Date: Apr 2004
Posts: 9,800
Re: DIY Two Way PCV System How-To (HoMedepoT style)
Originally Posted by miro_gt
nice man ... but let me say whay one of the two ways WILL NOT work !
- so when you're under boost, the PCV valve will close and the system will provide vacuum from the tee line (going to the turbo inlet) - that's OK
- but when you're not under boost, the PCV vavlve will open and the vacuum will become available through the intake manifold ... BUT it will not suck through the catch can, it will suck fresh air from the firlter instead because it's gonna be a lot easier ...
solution: put one-way valve on the tee line as well
- so when you're under boost, the PCV valve will close and the system will provide vacuum from the tee line (going to the turbo inlet) - that's OK
- but when you're not under boost, the PCV vavlve will open and the vacuum will become available through the intake manifold ... BUT it will not suck through the catch can, it will suck fresh air from the firlter instead because it's gonna be a lot easier ...
solution: put one-way valve on the tee line as well
personally I am not running this setup anymore anyways. I just open vented the valve cover and crankcase to a catchcan.
07-03-2005, 10:17 PM
#29
1.0 BAR
Join Date: Jul 2005
Posts: 231
Re: DIY Two Way PCV System How-To (HoMedepoT style)
Originally Posted by ****
Originally Posted by projekteg
no, of course it won't be a vacuum leak under boost, there's no vacuum, the pressure from the crank case will go through the charcoal canister, up the 'stock' pcv route, in to your seperator, and vent out the hose, you're right, it will work properly under boost and the pcv valve will be closed. however, when you're in vacuum (idle and cruising), the pcv valve will be open, look at your pictures, vacuum will be pulling on the hose off the manifold, the pcv valve will be open, and it will be sucking air through the vent hose because that's the path with least resistance, it won't be pulling through the stock pcv valve route like i think you had in mind. one easy way to fix that though would be to put another one way check valve in your 'vent' hose that will be close under vacuum and open during boost (opposite of the pcv valve), then when in vacuum, the manifold would be pulling from the crank case as opposed to to open air from the vent tube how it is now. see what i'm saying? the way it's hooked up now (only thinking about vacuum, don't even think about under boost right now) would be the same as having an open line off the intake manifold, which is a vacuum leak.
OK, my idea was the same
why did you change that system anyways, it seems to be functional ?
07-04-2005, 03:03 AM
#30
3.0 BAR
Thread Starter
Join Date: Apr 2004
Posts: 9,800
Re: DIY Two Way PCV System How-To (HoMedepoT style)
mostly because i didnt like seeing all that hose all over the engine bay.
that and i was too lazy to buy the second pcv valve for the other line, and without a turbo inlet pipe i cant really give that second line a good vacuum source.
that and i was too lazy to buy the second pcv valve for the other line, and without a turbo inlet pipe i cant really give that second line a good vacuum source.
