So...

Compressor:

a) While off, tank is empty and regulator valve set to fully close.
b) After turning on & having nothing connected to it; tanks fills & I slowly set the pressure on it to 20 PSI.
c) Air hose is connected back on.

The Evo:
I want to test EVERY component, thus I have kept the Buschur intake pipe & recirculating stock IX BOV on.

a) Boost line going to Halman MBC disconnected and capped at the 'T' near BOV.
b) Buschur intake filter & MAF sensor removed from intake pipe
c) Boost leak tester cap w/fitting attached to end of intake pipe & tightly secured.
d) Customized pressure regulator and gauge device connected to fitting in tester cap...air hose then connected to device.
e) Pressure regulator valve on device then slowly opened to allow air in.
f) Water bottle w/soapy water sprayed everywhere.

Results:

I only see slow foamy "froth" building up around the IC hoses/clamps...no fast bursting bubbles or audible leaks. I've sprayed all of the throttle-body, around the fuel injectors, and the IC itself.

Am I doing this right? Did I miss anything? Do I just keep the air going until the needle on the device reaches 20 PSI and shut the valve off on the gauge device, right?

The Problem/My Concern:

I didn't do anything with the 'TDC' and it seems to hold boost in the system...but the needle on the gauge doesn't move. If I remove the gauge device from the boost tester cap...air rushes right out through it just fine...so that tells me that the system is indeed pressurizing & holding it just fine.

The air regulator and gauge was from Autozone, it seems kinda cheap and even when the valve is set to close, I can hear some air seep through it. I'm about to go buy a beefier, purpose built one from the hardware store. Could that do the trick?

PS; Yes I did search, my whole setup was based off of the one in the 'How-To" section.

 

Looks good but I take my intake off though as there is no boost in the intake pipe. I place my leak tester right on my turbo.

Never put any turbo car a TDC to leak test and I like the quick disconnect but have always just done the valve stem in a PVC cap. Never an issue getting air in the system