Whats up all!

Last night, Milan and I did some WOT pulls with the car. It is driving great! The last pull, however, was a bit interesting. Because of the nice cool, dry weather, we hit just under 22 psi. On this pull, we smelled a bit of oil.

We pulled over to check everything and, well, the dipstick decided to blow out and spit oil everywhere. The crankcase wasn't evacuating fast enough on deceleration. Now, this is kind of my fault. I currently have a 1/2 NPT / -4AN elbow coming off of the PCV hole. I know this was stupid and it is being addressed! I am buying a valve cover that has a -10AN welded into the PCV hole (thanks MVP'sZO6!) so I'm increasing the output 150%. .

Okay the question is, will this be enough to do the trick? My setup is a monster catch can with -8AN vacuum lines and then the PCV line will be all -10AN except at the catch can where it will be stepped down to a -8.

One thing to know before answering, the car did 4 pulls at just under 20 PSI and I did not have the evacuation problem then. Car is currently still running good and like a banshee. Thanks in advance!

-Brent

EDIT: My current power level will be anywhere from 825-900RWHP...we will know on the 13th when we get it on the dyno. It's currently at a very safe 14 degrees timing and the compression is 9.4:1...pump/meth combo. I WILL NEVER go over 900RWHP with this car. Just wanted to get that info out there so there is a better idea of how much power/boost the crankcase evacuation setup will have to handle. I can take pics if I need to! Thanks again!

 

No problem dude!!

-8 should be enough. Bret has done several builds using -8 and they're all high boost high powered cars. I went with -10 because I was doing the Evac system from scratch and I wanted to make sure I wasn't going to blow my dipstick out again. LMAO... That didn't sound right..


Check this out. this isn't my car but its going to be very similar.

 

LOL DAMN! Twin catch cans?!

My setup should be enough for what I am running though right? That 22 PSI was actually 21.5 PSI and I took it up to 6800...which will not happen again either. I will be at 20-20.5 on good weather and 19ish in the heat.

Thanks again for everything bro!

 

I think you'll be fine

-4 to -10 is actually a greater flow area increase than 150%. A little Sunday evening algebra, area of a circle = .25*Pi*D^2. D=.625 for -10, and D=.25 for -4.

-10 area = .307sq.in.
-4 area = .049sq.in.

% area increase = [(.307-.049)-.049]*100 = 526.5%

 

had this issues with 22+psi.. but not after i vented everything. I run 3 8an lines vented to atmosphere over near the battery.. . Is it idea? maybe not.. but unless your going to put 100k miles or more on your motor.. who really cares..