Crankcase ventilation sans vortech
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Joined: Dec 2003
Posts: 660
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From: clearh2o, FL
Crankcase ventilation sans vortech
guys....
decided to mimick a setup by TIMROD (minor changes for the G, as well as the blue vortech colored ventcap)...
i figured awhile ago that the oily vapors from the CC wouldnt do the impeller ANY good (much less the TB or manifold), so i seperated the two.
on the vortech setup, the CC venthose runs into the back of the filter..... i bought a plastic threaded drainplug from autozone (2$) and plugged that hole off, then bought a cheapie APC filter (3$) with colors to match the vortech!!!
heres my layout (also used a ziptie to get the rather stiff hose to lay onto the radiator shelf....
thoughts??
-eS
decided to mimick a setup by TIMROD (minor changes for the G, as well as the blue vortech colored ventcap)...
i figured awhile ago that the oily vapors from the CC wouldnt do the impeller ANY good (much less the TB or manifold), so i seperated the two.
on the vortech setup, the CC venthose runs into the back of the filter..... i bought a plastic threaded drainplug from autozone (2$) and plugged that hole off, then bought a cheapie APC filter (3$) with colors to match the vortech!!!
heres my layout (also used a ziptie to get the rather stiff hose to lay onto the radiator shelf....
thoughts??
-eS
Registered User
Joined: Mar 2004
Posts: 43
Likes: 0
From: PA
Catchcan
Good idea. The crank case vent is used for scavenging oil vapor, which aids in emissions. Technically, some owners who do this could fail visual inspections--I know people in PA who have failed for this. So, modifier beware, but it is easy enough to remove for emission testing.
I used a similar contraption on my turbo cars, a catch can with a filter at the top. At higher boost a lot of oil vapor can go out the crank case, to the point where it starts to spray out of a filter if there is not a separater/catchcan. I don't think people are expereincing this problem yet on boosted VQ35's, but it's inevitable. Here's a pic of a catchcan and an explanation from the vendor, www.roadraceengineering.com (big in the DSM, EVO world).
I used a similar contraption on my turbo cars, a catch can with a filter at the top. At higher boost a lot of oil vapor can go out the crank case, to the point where it starts to spray out of a filter if there is not a separater/catchcan. I don't think people are expereincing this problem yet on boosted VQ35's, but it's inevitable. Here's a pic of a catchcan and an explanation from the vendor, www.roadraceengineering.com (big in the DSM, EVO world).
The vent hose that runs from the valve cover to the turbo inlet hose puts a lot of oily blow by into the intake tract and intercooler and piping. When oil builds up inside the intercooler, it drastically reduces the intercooler efficiency. To prevent this, many people install a filter onto the end of the hose instead and put a plug on the fitting where it went into the inlet hose. Cheap fix ($10 for the filter) but it makes a mess now in the engine compartment instead of inside the intercooler pipes. This new smaller catch can will hold the oil that blows out, it also allows you to gauge how much oil is coming out.
Did mine yesterday ..Scott..I left the CC hose in front of the wheel well and put my blower air filter back on the blower . Took her for a drive and ran into a WRX...he declined to race...lol
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