Quote:
Originally Posted by mad_sb
OK, so this is a common issue with blow-through. A few solutions to choose from if you have to run blow-through :
1. Cap the port at the manifold and T both crank vents together to your AOS / Catch can inlet and run a single outlet to the pre turbo intake tube, this should always pull a vacuum on the case, but will not provide a source of fresh air circulation.
2. Vent both ports to atmosphere... downside is will never pull a vacuum on the case
3. Run a dual can setup like factory (intake side port pre turbo). Down side is you will want to re scale the maf to account for the vacuum leak when manifold pressure is less than atmospheric.
I would probably try #1 first and see what it catches in the can. I might try #3 but I don't have to rely on a tuner to re-scale my maf for me since i use BRZedit.
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Sorry to bring back this old thread, but I've been lurking the forums trying to find help.
I have a issue with my car running low vacuum (.48-.52bar) and high STFT's at IDLE.
I have in the radium dual catch can set up with both of them vented to atmosphere, I noticed you said if they are vented to atmosphere I have to have my maf rescaled.
I've just done a complete build and have not driven the car as yet as I'm doing remote tuning with delicious
P.s I noticed @
mad_sb hasn't been active since last year, hoping someone else can help me