Wanted to know if my plan for my catch can / crankcase ventilation is a good one or not.

I have had broken rings before from too much crankcase pressure, so I want to get it right...


pre turbo intake--------------->> catchcan ----------->> T fitting split to valve cover and pcv valve, leave black box/ pcv valve in place.

This should give me good vacum draw through the catch can to both the top and bottom end, with no chance of boost pressure getting in and causing havoc. Any reason I should do it a different way??

Thanks for your input guys!

 

This is a good read for this topic

https://honda-tech.com/forums/showth...ase+evacuation

 

check your PCV valve's ability to hold 20+psi before you trust it to keep pressure out under boost.

Also, avoid anything that would let oil vapor into the turbo intake.

 

X2 on link posted it will tell you everything you need to know

 

Nice link thank you for that....

I am just as confused about what to do as before though lol

Either vented catch can with evacuation line to block and valve cover = no vacum draw but better for performance with no contamination, worse for evacuating crankcase pressure.

OR

sealed catch can with evac. line to block and valve cover, then to pre turbo intake = vacum draw, better for crankcase pressure evac., but worse for performance because of contamination.

What the hell do I do? I want reliability, I want to make sure the crankcase is well vented so that blow by doesn't blow out seals and break rings. so the obvious choice is to use pre turbo intake vacum draw, but how much performance loss does that equate too????

 

I don't know about all the techy stuff your saying, but here is how I run mine. With no issues as well. I vented the valve cover, and crank case. freeze plugged the pcv system hole, the ran the lines from the block and head. I left the drain back out because I didn't feel comfortable draining oil back into the block. The catch can is vented with 2" holes, with filters.

 

I based mine off the Endyn crank case vent system, it works very well.

 

Your arrows are pointing in the wrong direction... but yes hooking it up like that will work... HOWEVER, you should vent the valve cover more than it is stock.

If you really want to do this though I would recomend:

1. 2 large vents in the valve cover
2. Those 2 + the PCV line all going into a catch can
3. Pack the catch can with steel wool, Not the thin stuff but the REALLY thick stuff.
4. Run the "vent" of the catch can going to the intake side of the turbo with an inline fuel filter or similar glass walled inline filter with gauze wrapped around the filter so you can quickly and regularly check to see if you are sucking oil vapor into the turbo inlet.

To the poster who asked about the boost hitting your PCV. It doesn't matter the way he's outlined it's plumbing no boost will ever touch the PCV.