for anyone that has crankcase pressure issues
NP. Enlarging the stock side port (that is heavily baffled) to 5/8" cures every and all blowby issues.
We just had a customers car pushing oil back up the return line into his 6266 burning oil. Drilled out his valve cover to 5/8" and cured all smoke on decel and the car feels a lot more free in general (not suffocating from lack of ventilation).
There is no special magic here. The key is to open the stock existing holes ONLY because they are surrounded by baffles. This assures no oil is pushed or lost, because where the stock outlet is, is trapped in baffles.
I'm offering the service to others for $200 to drill/tap their covers and include a nice fitting as well.
We have been doing this for a lot of cars now.
We just had a customers car pushing oil back up the return line into his 6266 burning oil. Drilled out his valve cover to 5/8" and cured all smoke on decel and the car feels a lot more free in general (not suffocating from lack of ventilation).
There is no special magic here. The key is to open the stock existing holes ONLY because they are surrounded by baffles. This assures no oil is pushed or lost, because where the stock outlet is, is trapped in baffles.
I'm offering the service to others for $200 to drill/tap their covers and include a nice fitting as well.
We have been doing this for a lot of cars now.
No need to do that. No oil comes out because its so baffled in the corner where the stock outlet is on the driver side it never leaks or drips oil ever.
For 2 years I just used the fitting open to atmosphere with no issues. I run a filter over it now to keep moisture out of the valve cover, but other then that no need to recirculate it.
The fix is as simple as that, and that works for any power level of car.
For 2 years I just used the fitting open to atmosphere with no issues. I run a filter over it now to keep moisture out of the valve cover, but other then that no need to recirculate it.
The fix is as simple as that, and that works for any power level of car.
No need to do that. No oil comes out because its so baffled in the corner where the stock outlet is on the driver side it never leaks or drips oil ever.
For 2 years I just used the fitting open to atmosphere with no issues. I run a filter over it now to keep moisture out of the valve cover, but other then that no need to recirculate it.
The fix is as simple as that, and that works for any power level of car.
For 2 years I just used the fitting open to atmosphere with no issues. I run a filter over it now to keep moisture out of the valve cover, but other then that no need to recirculate it.
The fix is as simple as that, and that works for any power level of car.
Evolved Member
Joined: Oct 2013
Posts: 1,334
Likes: 26
From: United States
No need to do that. No oil comes out because its so baffled in the corner where the stock outlet is on the driver side it never leaks or drips oil ever.
For 2 years I just used the fitting open to atmosphere with no issues. I run a filter over it now to keep moisture out of the valve cover, but other then that no need to recirculate it.
The fix is as simple as that, and that works for any power level of car.
For 2 years I just used the fitting open to atmosphere with no issues. I run a filter over it now to keep moisture out of the valve cover, but other then that no need to recirculate it.
The fix is as simple as that, and that works for any power level of car.
Evolved Member
Joined: Oct 2013
Posts: 1,334
Likes: 26
From: United States
awesome, changing it up on mine here tomorrow. ill just run the baffled can on pvc side.
I am currently running a FP black BB and am getting a lot of oil coming out of my blow off valve. Essentially the entire intercooler system is coated with oil caused by the turbo.
In order to reduce my crankcase pressure I tapped the VC for a -10AN fitting and installed a saikou michi DC3 can with all -10AN fittings. See pic.
I originally had just the -10AN hose installed off the VC with it VTA. This did not help the issue at all. I am hoping that hooking it to the intake pipe the suction will help. By the way I am not logging crankcase pressure so I cant prove anything with data. Just going to base it off the about of residual oil in the intake and IC.
If this still doesn't work, I am going to open up the rear pcv port to -10AN using the STM fitting and put a catch can there as well between the VC and the IM while retaining the factory PCV. I will also install a check valve. Idea is from the below link. Not sure if I will do VTA or change the intake pipe fitting to a Y to accept both can outlet lines. I already have the can(bought 2 of the same).
https://www.evolutionm.net/forums/ev...l#post11464955
Its just a pain in the *** to mount these cans with the giant -10AN fittings. I may also end up relocating the battery to the trunk to free up some space.
I am also changing my oil drain line from factory to a -10AN next time I change my oil. Heard this could be an issue as well.
Just wanted to share my install setup. Let me know what you guys think.
In order to reduce my crankcase pressure I tapped the VC for a -10AN fitting and installed a saikou michi DC3 can with all -10AN fittings. See pic.
I originally had just the -10AN hose installed off the VC with it VTA. This did not help the issue at all. I am hoping that hooking it to the intake pipe the suction will help. By the way I am not logging crankcase pressure so I cant prove anything with data. Just going to base it off the about of residual oil in the intake and IC.
If this still doesn't work, I am going to open up the rear pcv port to -10AN using the STM fitting and put a catch can there as well between the VC and the IM while retaining the factory PCV. I will also install a check valve. Idea is from the below link. Not sure if I will do VTA or change the intake pipe fitting to a Y to accept both can outlet lines. I already have the can(bought 2 of the same).
https://www.evolutionm.net/forums/ev...l#post11464955
Its just a pain in the *** to mount these cans with the giant -10AN fittings. I may also end up relocating the battery to the trunk to free up some space.
I am also changing my oil drain line from factory to a -10AN next time I change my oil. Heard this could be an issue as well.
Just wanted to share my install setup. Let me know what you guys think.
EvoM Guru
iTrader: (50)
Joined: Mar 2006
Posts: 9,675
Likes: 132
From: Tri-Cities, WA // Portland, OR
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I originally had just the -10AN hose installed off the VC with it VTA. This did not help the issue at all. I am hoping that hooking it to the intake pipe the suction will help. By the way I am not logging crankcase pressure so I cant prove anything with data. Just going to base it off the about of residual oil in the intake and IC.
If this still doesn't work, I am going to open up the rear pcv port to -10AN using the STM fitting and put a catch can there as well between the VC and the IM while retaining the factory PCV. I will also install a check valve. Idea is from the below link. Not sure if I will do VTA or change the intake pipe fitting to a Y to accept both can outlet lines. I already have the can(bought 2 of the same).
...
I originally had just the -10AN hose installed off the VC with it VTA. This did not help the issue at all. I am hoping that hooking it to the intake pipe the suction will help. By the way I am not logging crankcase pressure so I cant prove anything with data. Just going to base it off the about of residual oil in the intake and IC.
If this still doesn't work, I am going to open up the rear pcv port to -10AN using the STM fitting and put a catch can there as well between the VC and the IM while retaining the factory PCV. I will also install a check valve. Idea is from the below link. Not sure if I will do VTA or change the intake pipe fitting to a Y to accept both can outlet lines. I already have the can(bought 2 of the same).
...
The intake pipe won't generate any significant suction unless you create a venturi effect. There is a picture of such a fitting somewhere in this thread. Maybe try searching on venturi.
What size tap did you use on the VC? Or to put the question more directly, is the opening in the fitting -10 AN as well?
The intake pipe won't generate any significant suction unless you create a venturi effect. There is a picture of such a fitting somewhere in this thread. Maybe try searching on venturi.
The intake pipe won't generate any significant suction unless you create a venturi effect. There is a picture of such a fitting somewhere in this thread. Maybe try searching on venturi.
I know the fitting you're talking about.
Does anyone have supporting data over a standard fitting that this will reduce pressure?
EvoM Guru
iTrader: (50)
Joined: Mar 2006
Posts: 9,675
Likes: 132
From: Tri-Cities, WA // Portland, OR
1/2" NPT to -10 AN is plenty big. That should have taken care of the crankcase pressure. For your setup, it might be possible that a direct crankcase vent is needed rather than an additional vent off the VC. However, its easy enough to try the venturi siphon and/or second VC vent first.
1/2" NPT to -10 AN is plenty big. That should have taken care of the crankcase pressure. For your setup, it might be possible that a direct crankcase vent is needed rather than an additional vent off the VC. However, its easy enough to try the venturi siphon and/or second VC vent first.
I think if it still doesn't work, ill try the venturi fitting only to see if it actually will make that much of a difference.
You can also vent from the balance shaft inspection hole if you still have issues and need to vent more