I'm not sure if a baffle will be required because the direction of the crank turning clockwise and the vent is on the top right side if you look to the engine from cam-side...
but I might be wrong


we'll see once I crank it up

 

How would you baffle the 10an fitting?
Can you send me some link of a baffle that would with a 8an fitting?

 

You would have to build one. They don't just sell them..

 

I just wanted to pop back in here and say thanks to those who provided feedback and advice whether direct or indirect. I bit the bullet and drilled out my valve cover this past weekend to fit a 1/2"NPT to -10AN fitting. I also opted to drill out the baffle and tap it which was a thrilling task. It wasn't hard but certainly time consuming. Hopefully the red locktite will do its job none of my bolts will back out.

Anyway, onto the pictures...I always forget to take photos but did snap one right before I put the vc back on (yes, its blurry but its not an exciting photo anyway!)

 

I'd like to measure my set-up. Mychailo, where did you place your pressure sensor to capture crankcase pressure?

tnx

 

I drilled out a spare oil filler cap. Several mods had to be made:

1) Replace the nut and bolt under the sticker with a screw that threads from the inside of the cap. This is a little dodgy because if the screw falls out, the screw and the metal tab that secure the cap to the valve cover will fall into the motor. I didn't plan on running this filler cap permanently, so I was ok with it.
2) Tap the recess under the sticker for 1/8" NPT.
3) Angle drill a through hole that enters the recess. Has to be done from the bottom side of the cap.

All-in-all, it was a pretty easy solution.

 

Maybe I missed it- what kind of pressure readings did you get mrfred?


Thinking about drilling out the balance shaft locking access hole and tapping it to something a little bigger and putting a fitting there before I put my block together... i can imagine a lot of oil is being flung around there, but with a long enough hose going up and/or a catch can, I wonder how well this would work?

 

Its in Nimpoc's post above mine. Stock ventilation was almost 3 psi. Removing the PCV system, attaching a 5/16" nipple in place of the PCV valve, and running 3/8" hose brought crankcase pressure down to ~0.75 psi. -8 AN fittings with 1/2" hose on both the breather and PCV openings brought it down to <0.2 psi, probably ~0.1 psi.

 

interesting, thanks!

I removed my pcv, had a catch can on the stock breather, put a 5/8" fitting in the front of the valve cover to another catch can, and made my own vented dipstick... but my previous 2.4 was bored WAY too loose.... shouldn't be an issue now. Might vent the balance shaft hole while I'm in there, and if it loses too much oil from there I will plug it again. I think with this many sources to breathe from, there shouldn't be too much airflow down any one hole and carry too much oil out..just a theory though.

 

Quote:
Originally Posted by mrfred View Post
I've got measurements on various setups dispersed throughout this thread. Quick summary for my built motor is (all values are peak and occurred at WOT max RPM):
Completely stock: ~2.7 psi (IIRC) out the the top.
Stock breather with 3/8" hose and fittings (approx -6 AN) VTA on the PCV side: ~0.75 psi.
1/2" hose and fitting VTA on breather with PCV side plugged: ~0.2 psi.
I figure that 5/8" hose and fittings VTA should be good for ≤0.1 psi, and 1/2" or 5/8" with a good siphon attachment to the intake pipe might pull a slight vacuum, at least for my motor.

mrfred....can you elaborate on what your definition of a "good siphon attachment" would be?

 

A nipple that attaches to the intake pipe at a 45 degree angle is a good start. The effect can be enhanced by building a flow obstruction on the inside of the intake pipe just before the nipple inlet (close to the nipple, between the nipple and the air filter).

 

I didn't realize you completely blocked off the PVC and VTA'd the rear vent. I gotta do something for mine here soon, might have to come over and pick your brain again.

 

Hi all I have a 2.3 fp black bb build and I'm wondering your opinion on the proper catch can/pcv setup.

the car is speed density and has -6AN from pcv side and drivers side to a 3 port stm dual breather filter vented square catch can mounted below the intake/on the trans. third port on stm catch can is vac line to the 4" speed density intake to pull vacuum.

I was having issues losing oil when the 3rd port on catch can was capped off as well as the nipple on the intake. I believe out of exhaust.

does this sort of setup seem okay and is the 3rd port on the can being a vacuum line back to a nipple on the intake potentially causing any issues?

thanks!!

 

You need to upgrade the fittings and lines to 8an or 10an...

 

i'm trying to figure out if the routing/overall setup is OK and if the vacuum from the catch can to the intake is correct.

I dont think going from -6 to -8 or -10 is going to make a big difference. the car is only running 27psi.