my FI PCV/Crank VAC system.
I know your setup works great but I am thinking this other one will to since my setup isn't near as hardcore as yours. You said before you went to the pte88 you had no scavenging problems with a breather and valve covers to the turbo inlet right?
I also bought a brether but the damn thing is in the way of my stb, I guess either way I choose I don't need it but I was planning to
I suppose I can try the 'other' system first if it doesn't work I can always go to the one I know does.One more question, since I am on a roll, LOL My only concern msotly with your system is the too much vaccum, etc. Was it only a problem at idle and/or part throttle? Obviously not WOT as the line to the turbo would take care of this. If thats the case a guy could easily tell once you fire up if you can here the crank seal wistle
Thread Starter
Joined: Nov 2001
Posts: 10,018
Likes: 51
From: Virginia
my oil drain problem is only because my turbo is at the height of my drain. the vac just gently helps suck it out more or less.
from my experience 'too' much vacuum is indicated only when you suck air past the front or rear main seal and it goes SKREEEEEEEEEEE until you tap the throttle etc to increas manifold pressure.
a hose or hoses with some sort of 'regulator' even a hose clamp to squeeze it off would be effective at metering it to precisely where you want it.
my new engine seems to be happy with one 3/8" vent tube just like my old one is.. that is i hear no complaints from it.
from my experience 'too' much vacuum is indicated only when you suck air past the front or rear main seal and it goes SKREEEEEEEEEEE until you tap the throttle etc to increas manifold pressure.
a hose or hoses with some sort of 'regulator' even a hose clamp to squeeze it off would be effective at metering it to precisely where you want it.
my new engine seems to be happy with one 3/8" vent tube just like my old one is.. that is i hear no complaints from it.
my oil drain problem is only because my turbo is at the height of my drain. the vac just gently helps suck it out more or less.
from my experience 'too' much vacuum is indicated only when you suck air past the front or rear main seal and it goes SKREEEEEEEEEEE until you tap the throttle etc to increas manifold pressure.
a hose or hoses with some sort of 'regulator' even a hose clamp to squeeze it off would be effective at metering it to precisely where you want it.
my new engine seems to be happy with one 3/8" vent tube just like my old one is.. that is i hear no complaints from it.
from my experience 'too' much vacuum is indicated only when you suck air past the front or rear main seal and it goes SKREEEEEEEEEEE until you tap the throttle etc to increas manifold pressure.
a hose or hoses with some sort of 'regulator' even a hose clamp to squeeze it off would be effective at metering it to precisely where you want it.
my new engine seems to be happy with one 3/8" vent tube just like my old one is.. that is i hear no complaints from it.
So really its rear drivers vc to brake booster via seperator and passenger sides blocked off. Why not have the vc's T together to equalize the vac draw or do you have the passengers side go to the turbo inlet to get air moving throughout the entire crankcase? Than having the valley cover port plugged since you only have one vent line now.
Lastly, I remember you saying that the valley cover does a decent job catching the oil so you don't have a seperator there but what about this same 'vent' line from the valve cover to the turbo? Under boost wouldn't there be some misty vapours?
Another reason I want to consider your setup is that you can use the evap tap for your reference lines and virtually have a hidden vac system with that seperator instead of lines everywhere and a big catchcan.
Thread Starter
Joined: Nov 2001
Posts: 10,018
Likes: 51
From: Virginia
you are right, i am pulling 'diagonal' to keep more 'wind' moving through the crankcase in one direction. they could be t'd together, but the draw would be half as much through each.. more hoses... dont see the beneifit.
you could pull from the front passenger port on the valvecover but i get more oil out of there than i do through the valley cover.. so i use the valley cover
you are right the valvecover I have a pcv valve to deflect some oil (after the build in deflector) then i have the home depot coalescing filter to catch any more oil, and i also have a one way valve in there to keep boost out...the pcv valve 'kinda' does this but i wanted something extra.
you could pull from the front passenger port on the valvecover but i get more oil out of there than i do through the valley cover.. so i use the valley cover
you are right the valvecover I have a pcv valve to deflect some oil (after the build in deflector) then i have the home depot coalescing filter to catch any more oil, and i also have a one way valve in there to keep boost out...the pcv valve 'kinda' does this but i wanted something extra.
you are right, i am pulling 'diagonal' to keep more 'wind' moving through the crankcase in one direction. they could be t'd together, but the draw would be half as much through each.. more hoses... dont see the beneifit.
you could pull from the front passenger port on the valvecover but i get more oil out of there than i do through the valley cover.. so i use the valley cover
you are right the valvecover I have a pcv valve to deflect some oil (after the build in deflector) then i have the home depot coalescing filter to catch any more oil, and i also have a one way valve in there to keep boost out...the pcv valve 'kinda' does this but i wanted something extra.
you could pull from the front passenger port on the valvecover but i get more oil out of there than i do through the valley cover.. so i use the valley cover
you are right the valvecover I have a pcv valve to deflect some oil (after the build in deflector) then i have the home depot coalescing filter to catch any more oil, and i also have a one way valve in there to keep boost out...the pcv valve 'kinda' does this but i wanted something extra.
i changed my setup.i still have the big breather where the oil cap goes.but now i just run a 3/8" hose from each valvecover opening T'd to this in the wastegate tube.draws a vacuum when the wastegate opens up and breathes the rest of the time.no need for check valves
OK... bringing back the dead here, but no better place to ask. Please no big words, or foreign language as i may not understand. 
I have read through this thread completly. I feel i understand it, but go through it in my head, and get confused.. So hear is my plan.
Ok, pcv valve gets replaced. Where can i buy the one you used might mouse? have a part number, or link?
Line for brake booster gets cut. Check valve on manifold side. A T with it going back to brake booster, and to a seperator ie catch can. I get this.
The two lines in this pic
http://fastrides.com/photos/mm/categ...ture12035.aspx
the 1 is going to tb. The other im not sure where, and they go pre turbo so to the air filter? or intake for the turbo? I just have a 7 inch big k&n filter on the end of my turbo so where would i run them?
With this stuff done would i be ok?
Thanks, Chris
I have read through this thread completly. I feel i understand it, but go through it in my head, and get confused.. So hear is my plan.
Ok, pcv valve gets replaced. Where can i buy the one you used might mouse? have a part number, or link?
Line for brake booster gets cut. Check valve on manifold side. A T with it going back to brake booster, and to a seperator ie catch can. I get this.
The two lines in this pic
http://fastrides.com/photos/mm/categ...ture12035.aspx
the 1 is going to tb. The other im not sure where, and they go pre turbo so to the air filter? or intake for the turbo? I just have a 7 inch big k&n filter on the end of my turbo so where would i run them?
With this stuff done would i be ok?
Thanks, Chris
Thread Starter
Joined: Nov 2001
Posts: 10,018
Likes: 51
From: Virginia
the one way valve i got from www.turbotechnologyinc.com
both of those lines went to the intake elbow before the turbo, currently i only run one, they are the fresh air source when the engine is in vacuum and they are an exit of crankcase pressure when in boost
both of those lines went to the intake elbow before the turbo, currently i only run one, they are the fresh air source when the engine is in vacuum and they are an exit of crankcase pressure when in boost
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Verdad Gallardo the one way valve i got from www.turbotechnologyinc.com
both of those lines went to the intake elbow before the turbo, currently i only run one, they are the fresh air source when the engine is in vacuum and they are an exit of crankcase pressure when in boost
both of those lines went to the intake elbow before the turbo, currently i only run one, they are the fresh air source when the engine is in vacuum and they are an exit of crankcase pressure when in boost
Ok, thats what i though. Since all i have is an airfilter on my turbo would i just put a breather on thos lines if i needed to run both? Run them inside air filter somehow?
Thanks, Chris
Thread Starter
Joined: Nov 2001
Posts: 10,018
Likes: 51
From: Virginia
no, the idea is that there is a relative low pressure inside the intake of a turbo system where the turbo is sucking air through the filter into it. you WANT this lower than atmospheric pressure to draw on the crankcase when you are under load. if you just put filters on it, then they would just be two more breathers.
you can drill and screw fittings into the base of the filter
you can drill and screw fittings into the base of the filter
HI MM, its been a long time,
OK today i ran a vac/boost gauge on the end of the break/booster black little plastic valve that i install in on top of my oil fill cap, i found that i get a little vacume from it, i thought this is suspose to seal 100% shut? i think i was getting like 2-4" of vacume, i guess these valves dont seal 100%?
let me know because i think it would be a good idea to install a tiny breather on the blow off side of it so no dirt gets sucked into it .
OK today i ran a vac/boost gauge on the end of the break/booster black little plastic valve that i install in on top of my oil fill cap, i found that i get a little vacume from it, i thought this is suspose to seal 100% shut? i think i was getting like 2-4" of vacume, i guess these valves dont seal 100%?
let me know because i think it would be a good idea to install a tiny breather on the blow off side of it so no dirt gets sucked into it .
Thread Starter
Joined: Nov 2001
Posts: 10,018
Likes: 51
From: Virginia
depends on how big your fresh air leak is. 2-4 sounds good to me, if it is completely sealed off you have blow by issues or some other leak you dont know about.
lets see a pic
lets see a pic
I Tested My NEW PCV duel catch can set up today , Results inside. Tested My set up today, using a vacume/boost gauge on my PCV system.
OK i just got around to doing this , i know its been a while.
I modified a factory/stock oil cap with a T fitting so i could hook up a vacume line to it, and run it into my car under the hood through my driver window. I drilled a hole in the top through the oil cap, with a rubber washer i pressed the valve fitting super tight into the oil cap, check for leaks and it came out good. Screwed the oil cap on the filler neck, took the car for a drive.
Ok this is what i came up with
at 5 PSI , no PCV reading on the hand held gauge, my old set up about 1 psi.
at 7-8 PSI still zero reading, old set up 2 psi
at 10-11 PSI Big ZERO old set up 2.5-3 PSI at 9 psi
So it works and it works Perfect, if it didnt vent the PCV into the breather can i would be getting some PCV boost reading on the gauge, and that means my crancase is getting pressurized.
Now if i was to diconect each of my 3/8" rubber lines, one that comes off of each valve cover to the two 3/8 inputs on my breather can and cap them off , i would defently see PCV pressure/boost on that gauge.
I hope this helps everyone, LSX PCV systems can be a little tricky, especialy when it comes to FI set ups, and that thin line between Street and Race.
If anyone needs help/advice, Pictures of my set up or pictures of the test i did
PM me
Glade to help u out
OK i just got around to doing this , i know its been a while.
I modified a factory/stock oil cap with a T fitting so i could hook up a vacume line to it, and run it into my car under the hood through my driver window. I drilled a hole in the top through the oil cap, with a rubber washer i pressed the valve fitting super tight into the oil cap, check for leaks and it came out good. Screwed the oil cap on the filler neck, took the car for a drive.
Ok this is what i came up with
at 5 PSI , no PCV reading on the hand held gauge, my old set up about 1 psi.
at 7-8 PSI still zero reading, old set up 2 psi
at 10-11 PSI Big ZERO old set up 2.5-3 PSI at 9 psi
So it works and it works Perfect, if it didnt vent the PCV into the breather can i would be getting some PCV boost reading on the gauge, and that means my crancase is getting pressurized.
Now if i was to diconect each of my 3/8" rubber lines, one that comes off of each valve cover to the two 3/8 inputs on my breather can and cap them off , i would defently see PCV pressure/boost on that gauge.
I hope this helps everyone, LSX PCV systems can be a little tricky, especialy when it comes to FI set ups, and that thin line between Street and Race.
If anyone needs help/advice, Pictures of my set up or pictures of the test i did
PM me
Glade to help u out
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