Nobody learns without asking questions.

The more vents you have the easier it is for excess pressure in the motor to be relieved. The more pressure you relieve from inside the block, the easier it is on the rings and it can allow the motor to make more power because it has less pressure underneath the piston. It helps to allow rotating assembly (ie. piston, crank, rods...) to spin easier because there is less force under the piston to keep it from coming down after the spark ignites the air/fuel mixture. Stock motors are fine with the single vent setup, the more compression you add (or higher boost level) will add more crank case pressure which needs more vents to escape easier. This is probably a little overkill for my mild compression ratio but it will be good for anything in the future. Do it once and do it right the first time.

Also, I am working on posting a picture of the setup. I am very lazy if you haven't noticed yet lol

 

Vents are running open to under the car. I don't need a catch can on this setup, I just make sure the oil is good all the time.

 

Theres the picture I wanted to see....Exactly what it should look like.....We do the exact same setup on drag bikes because of the pressure buildup for the reasons you explained....

 

Might as well make a DIY Catch can, IMO, theres plenty of write up's.

 

I chose to not build a can because I didn't want anything else added to the engine bay. The motor has minimal blow by so it isn't something I worry about. Plus I didn't want the oil smell that a catch can has because of it trapping oil under the hood, these vents run under the car so it evacuates the burnt oil smell. The motor is a 10.8:1 b18a1 block b18b1 head with mild cams.

 

Sounds good, and true about the catch can smell, lol

 

im speechless.... i guess for the diy guys good thought..

i welded two -12 bungs on my v/c couldnt have my engine bay looking like that

 

I have a B18a1 motor too...Is the B18b1 head a better head to run??? Is it a direct swap too??? And what cams did you end up using???
Thanks.....

 

I used crower 62402-2 cams, the heads are basically the same.

As for sullivanracing, I would have welded them myself if it weren't for the fact that I don't have aluminum wire nor am I going to buy it for 1 project. What I did turned out just fine and looks just fine...but thanks for your comment...

 

Aint nothing wrong with a threaded fitting....If welded then it`s permanent, but threaded you could always put a rubber plug or a pipe plug if needed.....
Someones always gotta knock someone elses ideas or projects.....Looking for a spare cover to try my own idea at this myself.....