my FI PCV/Crank VAC system.
answer 1: no catch can between my ls6 valley cover cuz it does a pretty good job of controlling oil AND the seperator was too much of a restriction to limit my crankcase vaccum the way i wanted.
answer 2: the intake makes much more vaccum during part throttle situations than the inlet pipe ever could.. especially on a turbo car
answer 3: its a pep boys spectre valve cover breather, i put a piece of rubber inside it to make it into a valve
these are the money shots here. if somebody wants to market these i am cool with it long as i get free ones.
cut the foam that it comes with down to set the amount of positive 'cracking' pressure
answer 2: the intake makes much more vaccum during part throttle situations than the inlet pipe ever could.. especially on a turbo car
answer 3: its a pep boys spectre valve cover breather, i put a piece of rubber inside it to make it into a valve
these are the money shots here. if somebody wants to market these i am cool with it long as i get free ones.
cut the foam that it comes with down to set the amount of positive 'cracking' pressure
Very cool MM
let me ask you something , can i run my LS6 valley cover with a check valve to the intake port for max vacume during part throttle driving and use the T'd valve cover ports and vacume lines to the catch can than down to the FI inlet? and than that relieve valve on the valve cover , no breathers
is this pretty much it?
let me ask you something , can i run my LS6 valley cover with a check valve to the intake port for max vacume during part throttle driving and use the T'd valve cover ports and vacume lines to the catch can than down to the FI inlet? and than that relieve valve on the valve cover , no breathers
is this pretty much it?
Thread Starter
Joined: Nov 2001
Posts: 10,018
Likes: 51
From: Virginia
yes that could and should work fine, but what say your engine develops some blow by.. the only way it could get out is through the catch can. and i figure that may not be enough flow. i see quite a bit of blow by on loose FI engines under big loads.
MM I forget to say that i am running a procharger vacuum manifold in my break booster line for vacuum sources , boost gauge, methanol turn on, intank duel fuel pump turn on.
will this hurt anything?,vacuum leak etc? i think this is what the LS1 Vette guys use for boost & vacuum sources
will this hurt anything?,vacuum leak etc? i think this is what the LS1 Vette guys use for boost & vacuum sources
Yeah thats what i figured
I am thinking on the line that went to the T-Body will now go down to the supercharger inlet hat ,cap off the T-body port,
and the PCV line will go to my ANW catch can then to the check valve then to the intake port, I think this is how prochager says to do it , very simple
Now i dont have a LS6 valley cover yet , so do i need it? , if so would i T that into to the PCV line to the intake also
or is this over kill
I have a breather on the oil fill now that i think i will take off and put a relief valve instead like you did, but i dont even think this is nessary
what is the part # to that ball check valve you have , is it like the one the GN guys use?
I am thinking on the line that went to the T-Body will now go down to the supercharger inlet hat ,cap off the T-body port,
and the PCV line will go to my ANW catch can then to the check valve then to the intake port, I think this is how prochager says to do it , very simple
Now i dont have a LS6 valley cover yet , so do i need it? , if so would i T that into to the PCV line to the intake also
or is this over kill
I have a breather on the oil fill now that i think i will take off and put a relief valve instead like you did, but i dont even think this is nessary
what is the part # to that ball check valve you have , is it like the one the GN guys use?
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Verdad Gallardo Thread Starter
Joined: Nov 2001
Posts: 10,018
Likes: 51
From: Virginia
the ls6 valley is just another place to tap crankcase... it happens to be a nice one. you can use one of the other valvecover spots if you had to.
the valve i believe is the one you are talking about. i got it from turbo technology
the valve i believe is the one you are talking about. i got it from turbo technology
very interesting setup, MM you should start like a "kit" of all the little things people would need and sell them on the side. i know i'd like to buy something that is complete instead of trying to run around and find all those little tings
hey cool thread.. over a year later and this same system is venting my crankcase, giving vac to my crankcase, and keeping my very low turbo from putting oil in the exhaust. the motor has loosened up the the amount that i only can have one line running from engine to turbo intake.
Also, what is your reccommendations for starting off? 2 lines and go from there to see if you have too much vaccum? More really isn't a bad thing right?
P.S. - You are hooking up a vac/boost gauge to the crankcasee to monitor idle, part throttle and wot for the correct pressures right?
edit - The more I think about it, I think I got it. Since you have more blow by now with a 'loose' engine, you create less overall vaccum in the crankcase and need to eliminate one of those vent/leak lines correct?
Last edited by Websy21; Mar 25, 2008 at 04:21 PM.
Thread Starter
Joined: Nov 2001
Posts: 10,018
Likes: 51
From: Virginia
the more blow by, the less vacuum can be created in the engine with a given amount of suction (idle vacuum)
before i had to bleed off a lot of vaccum to keep the seals from squealing, and after the engine wore soem me i needed to bleed off less
if the engine was in real bad shape you could apply full vacuum to it and not make the seals squeal
i set it up for myself to have just enough to keep my turbo from smoking oil out the tailpipe
before i had to bleed off a lot of vaccum to keep the seals from squealing, and after the engine wore soem me i needed to bleed off less
if the engine was in real bad shape you could apply full vacuum to it and not make the seals squeal
i set it up for myself to have just enough to keep my turbo from smoking oil out the tailpipe
the more blow by, the less vacuum can be created in the engine with a given amount of suction (idle vacuum)
before i had to bleed off a lot of vaccum to keep the seals from squealing, and after the engine wore soem me i needed to bleed off less
if the engine was in real bad shape you could apply full vacuum to it and not make the seals squeal
i set it up for myself to have just enough to keep my turbo from smoking oil out the tailpipe
before i had to bleed off a lot of vaccum to keep the seals from squealing, and after the engine wore soem me i needed to bleed off less
if the engine was in real bad shape you could apply full vacuum to it and not make the seals squeal
i set it up for myself to have just enough to keep my turbo from smoking oil out the tailpipe
One more thing, since you have tapped into the brake booster line, where did you reference for your boost gauge and access, etc?
Thread Starter
Joined: Nov 2001
Posts: 10,018
Likes: 51
From: Virginia
my boost gauge comes off of the intake where the evap connection used to be, same for the fuel pressure regulator and my blow off valve reference
my manifold pressure for the computer comes out of the old map sensor port in the back of the intake
my manifold pressure for the computer comes out of the old map sensor port in the back of the intake
Since this was one of the most helpful threads on this subject I am bring it on up for a very simple concern.
When routing your vac system, which ever how you do it, do you run bigger vac or fuel lines? Or does the stock lines suffice if they are already routed somewhat they way you want it? Would make life allot easier but want to do it right.
I am mostly referring to the one on the drivers side rear that connects over to the passenger rear and T's off up front to the valley port. I amguessing its a good idea to replace it with 3/8 tubing. I already bought like 20'' of 3/8 fuel line.
When routing your vac system, which ever how you do it, do you run bigger vac or fuel lines? Or does the stock lines suffice if they are already routed somewhat they way you want it? Would make life allot easier but want to do it right.
I am mostly referring to the one on the drivers side rear that connects over to the passenger rear and T's off up front to the valley port. I amguessing its a good idea to replace it with 3/8 tubing. I already bought like 20'' of 3/8 fuel line.