2ZR Turbo Yaris

[06YarisRS]

Originally Posted by tmontague

looks good, good luck!

are you using an oil restriction plate on your turbo oil inlet?

Thanks! I'll need it.

I'm going to try my upgraded drain system first to see if it allows the turbo to drain quicker. The turbokits guys sent me a restrictor .06" that attaches to the fitting at the block as opposed to at the turbo oil inlet. If my smoking is cured by the larger drain, I won't install the restrictor. Despite what I've read online, I've been assured that a .06" restrictor is perfectly fine for a journal bearing turbo. Apparently they have a number of kits running with the restrictor. As a matter of interest, what oil pressures do you see routinely under low and high revs?

I've been struggling to figure out how to fix my fuel trim issues. My tuner says ditch the PCV altogether by blocking off the manifold and PCV. He says to use a vented catch can on the valve cover side. He believes it will fix my fuel trim issues . I like the idea of my crankcase being evacuated of all that crap. I'm not sure if I could run a hose from my valve cover to a sealed catch can and then into my 3" intake (pre-turbo) and if that would make any difference. Theoretically, no "new" air would be introduced into the system and there would be vacuum. But, then again if the vent is to allow air into the block as the PCV allows vacuum to clear the block, maybe these two sides would be fighting each other. I know that the F/IC has a MAP sensor built in and apparently MAP is unaffected by vacuum leaks or unmetered air. I have an email in to turbkits asking them to explain this. There isn't anything in the manual that talks about how to deal with the PCV/breather system and there's definitely no return fitting post MAF and pre-TB as in the stock system. I had a look at the F/IC fuel map today and it shows negative numbers that actually seem to parallel the positive fuel trims that I'm seeing. That said, I don't really understand the tables - yet. Maybe all my fuel trim issues will be resolved with the F/IC install.

Here is the latest I've been reading. About 1/2 down the page, "Keith" seems to explain it in a way I can comprehend. It's where I got teh idea to plumb the valve cover hose through a catch can to my custom 3" intake.

https://grassrootsmotorsports.com/fo...l/11243/page1/

Feel free to speculate if you care to.

Thanks.