How to stop oil evoparation
Joined: Oct 2008
Posts: 4,805
Likes: 15
From: St.Petersburg/Tampa, FL
If the car is used mainly for track, ditch the pcv. I replaced mine with an m14x1.5 to -6 an to a -6 an to 3/8" barb adapter. From there, it goes to a saikou catch can, that is vented to atmosphere. The front vent is routed to a second catch can, and then to atmosphere as well.
Required fittings:
http://m.summitracing.com/parts/sum-220765
http://m.summitracing.com/parts/rus-670520
I've been running this setup since a couple weeks ago. It completely eliminated my catch can from over flowing after every 20 minutes of track time. I was easily adding 1 liter of oil for every 90 minutes of track time. Now, my dip stick level remains the same from start to end of day.
Do not cap your pcv! This is the dumbest advice that is often advocated here. Sure, it's going to stop oil from getting sucked into the intake manifold, but, you are also blocking off a means of crank case pressure relief. Like someone else said, it does not address the root cause.
If you insist on keeping the pcv valve for emissions, then the the only other option is drilling the valve cover baffle.
Required fittings:
http://m.summitracing.com/parts/sum-220765
http://m.summitracing.com/parts/rus-670520
I've been running this setup since a couple weeks ago. It completely eliminated my catch can from over flowing after every 20 minutes of track time. I was easily adding 1 liter of oil for every 90 minutes of track time. Now, my dip stick level remains the same from start to end of day.
Do not cap your pcv! This is the dumbest advice that is often advocated here. Sure, it's going to stop oil from getting sucked into the intake manifold, but, you are also blocking off a means of crank case pressure relief. Like someone else said, it does not address the root cause.
If you insist on keeping the pcv valve for emissions, then the the only other option is drilling the valve cover baffle.
Joined: Aug 2010
Posts: 2,439
Likes: 9
From: Toronto
The pcv helps in relieving crank case pressure during deceleration and part throttle. Capping it means you're relying only on the front breather, which is not big enough to vent all the pressure. Remember, driving on the street, the built up crank case pressure is relatively low, as well as having the manifold aiding in pulling out excess pressure. On track, chances are, most of the lap will consist of high load, which means pcv is mostly closed.
While running the pcv, I had constant dip stick popping issues. Now that I converted the pcv port to an open vent, the problem no longer persists.
While running the pcv, I had constant dip stick popping issues. Now that I converted the pcv port to an open vent, the problem no longer persists.
Joined: Oct 2008
Posts: 4,805
Likes: 15
From: St.Petersburg/Tampa, FL
The pcv helps in relieving crank case pressure during deceleration and part throttle. Capping it means you're relying only on the front breather, which is not big enough to vent all the pressure. Remember, driving on the street, the built up crank case pressure is relatively low, as well as having the manifold aiding in pulling out excess pressure. -------On track, chances are, most of the lap will consist of high load, which means pcv is mostly closed---
While running the pcv, I had constant dip stick popping issues. Now that I concerted the pcv port to an open vent, the problem no longer persists.
While running the pcv, I had constant dip stick popping issues. Now that I concerted the pcv port to an open vent, the problem no longer persists.
Joined: Aug 2010
Posts: 2,439
Likes: 9
From: Toronto
It is an emission device. But it also serves to not only relieve pressure, but to actively draw pressure using intake manifold vacuum.
You can run just the front breather to atmosphere. But from my experience, it's not enough. I always had the dip stick popping out when using only the front breather.
Some of my K series buddies are running valve covers with 3 or 4 breathers. You can never have too much venting in my opinion.
P.s. I'm not saying my way is the end all, be all. But, it works damn well.
You can run just the front breather to atmosphere. But from my experience, it's not enough. I always had the dip stick popping out when using only the front breather.
Some of my K series buddies are running valve covers with 3 or 4 breathers. You can never have too much venting in my opinion.
P.s. I'm not saying my way is the end all, be all. But, it works damn well.
Joined: Oct 2008
Posts: 4,805
Likes: 15
From: St.Petersburg/Tampa, FL
Same boat with you lol I have heard that over venting the head can leave to with not enough oil in the head. I do know the o-rings on the dip stick wear. IMO the front breather is enough venting
Joined: Aug 2010
Posts: 2,439
Likes: 9
From: Toronto
Nah, venting is always good. You're venting air, not oil. Some of the crazy drag guys even run vacuum pumps to get more power.
Flipping dipstick 180* is a bandaid fix, and it's not fixing the problem. If it's popping out, it means there's excess pressure.
Flipping dipstick 180* is a bandaid fix, and it's not fixing the problem. If it's popping out, it means there's excess pressure.
Joined: Jun 2009
Posts: 3,689
Likes: 21
Joined: Aug 2010
Posts: 2,439
Likes: 9
From: Toronto
Originally Posted by s2000ellier' timestamp='1410301176' post='23323677
how is capping the pcv preventing the dispersion of crank case pressure when you have a giant port on the front of the valve cover?
If you're driving mainly on street, with occasional track, then sure, keep the lines as is.
I think some of you guys are under estimating how much pressure develops in the crank case. When you cap the pcv, you're restricting a point of relief, even if it's only during deceleration and part throttle.
http://www.hondatuningmagazine.com/t...m/viewall.html