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Mark Yacavone · 02-02-2019, 06:18 PM

I don't think you can pull much vacuum in the crankcase with just a PCV ..Maybe with the check ball completely removed.. Would be hard to tune that set up ;-)
You need the header hoses for high speed suction. Of course, not legal in Stock.

I just use the PCV to help keep more of that thin synthetic oil inside the motor.

02-02-2019, 06:18 PM	#2
Mark Yacavone Veteran Member Join Date: Mar 2002 Location: Miles From Nowhere Posts: 7,809 Likes: 2,900 Liked 5,114 Times in 1,948 Posts	Re: Adjustable PCV Valve I don't think you can pull much vacuum in the crankcase with just a PCV ..Maybe with the check ball completely removed.. Would be hard to tune that set up ;-) You need the header hoses for high speed suction. Of course, not legal in Stock. I just use the PCV to help keep more of that thin synthetic oil inside the motor. __________________ "We are lucky we don't get as much Government as we pay for." Will Rogers