Thread: Crank Case Ventilation fully explained. (Turbocharged edition.)

has anyone figured out a way to fit in a nice belt driven pump in place with the ac was or where the power steering is if it were to be removed?

hello ben just want to know if this would applicable for gtir engine ?

GTi-R engine should be functionally identical to the other SR20 engines when it comes to the PCV system. The only SR20 engines with any real difference are the BTCC engines, which had dry sumps, so they had no baffling in the valve cover. Their valve covers are basically flat, and they have no PCV system to speak of since the dry sump does that work.

I came across this: and its not the thread itself but what I found in post 624.

Poll: GI for PCV pieces - Mazdaspeed Forums

His testing of a pcv valve (and the addition of an oring)

to view the photobucket pictures, you'll have to view them on photobuckets site, since his bandwidth cap has been reached)

I can't see the pics, even on Photobucket. =(

Weird it lets me, did you watch the videos?

Videos are blocked at work. I'll watch them soon.

That's awesome! I think I will try this myself, though I wonder if it will cause the PCV valve's plunger to stay so far back that it will restrict flow at vacuum.

This one might be worth looking over, but the diagrams arent as easy to understand as Ben's
(i think not being as familiar with their pcv system is part of it too)

OCC and crankcase pressure testing diaries - Mazdaspeed Forums

I actually think this is a very bad idea. the factory setup allows for PCV during boost. this does not. the factory setup is "good" and this one is "unacceptable". In other words, there is absolutely no reason to remove a perfectly good WOT PCV and replace it with... this. That is simply unacceptable. It just makes everything worse. This setup provides not one single positive benefit. The oil will become filthy faster, and power output will be reduced (possibly by 1-2%).


also,
Maintains stock prevention of crank case pressurization - Yes

I disagree. By opening a port from the crankcase to the atmosphere you invite atmospheric pressure into the crank case.

however, in a running engine, due to constant blow-by all engines produce, there will be slightly more pressure in the crank case than outside it during WOT. Which means the pressure inside the crankcase will be higher than atmospheric, even if just slightly. Which by definition, means that it is pressurized. As engine vacuum drops, and volumetric efficiency climbs, it will become increasingly pressurized. At idle there is enough engine vacuum to prevent an overall pressurization on a healthy engine, but that is NOT what that valvecover port is for: its for WOT.