So the PCV stuff kinda took a short back seat while the car was down for suspension work. And now VIR is < 2 weeks away so I'll be getting back to it soon, though doing a bit of testing and just setting the info/data aside for the time being.
In a nut shell
@Switchleg is awesome and hooked me up with the new Switchpatch so I was able to add a pin to the ECU and data log both the crankcase AND PCV pressure sensors at the same time. I really wanted to wait for this because it makes doing pulls/comparisons SOOO much easier. Plus I'll be able to repurpose the ECU pin for other uses in the future too.
But for a little teaser/idea of what's to come:
Here is the Epman (bobo ass APR knockoff) TIP in Full (darker lines) vs Basic (lighter lines) retrofit form.
3rd gear pull. The Venturi is able to suck the crankcase back down to -0.7psi WELL before the turbo is even fully spooled. The Basic retrofit gets the crankcase down to that level at 4500rpms.
2nd gear pull. You can see the Venturi is able to suck down the crankcase back to -0.7psi or more vacuum almost immediately as the turbo spools, while the Basic retrofit form isn't able to get the crankcase back down to it's target vacuum level until nearly redline.
ANY time that the crankcase isn't at least -0.7 to -0.8psi, the diaphragm is OPEN. This means a vacuum source is pulling a BIG volume of air on the bottom end in an attempt to replenish that vacuum level.
2nd gear is a LOT harder for the PCV to keep up because it runs through the RPMs a lot faster plus load is probably a bit less (and airflow across the TIP is less also).
I took an old phone and put it to use (since I can't find my damn Gopro)... That hood vent is coming in handy.
Ran out of daylight to test with Venturi... but this is coming up soon and will show exactly what I'm talking about with regards to why the full retrofit is the only way to fix the OEM system's shortfall...
I am not 100% certain I'm going to be running the crankcase sensor on TRACK, but 100% will be doing at an autocross with and without Venturi. That won't be until April though. Depending on how the day/weather goes in a few weeks, I MAY try it though. Just for grins. Won't be with my phone stuck to the hood though