Adjustable PCV Valve

Jeff Stout · 01-31-2019, 05:44 PM

I always thought it was a way to build crankcase vacuum. The bonus is the nitro in the oil going into intake charge.

Bench Racer · 01-31-2019, 06:01 PM

Quote:

Originally Posted by Jeff Stout

I always thought it was a way to build crankcase vacuum. The bonus is the nitro in the oil going into intake charge.

Is this better than the sterno on the top of the radiator?

Dragsinger · 01-31-2019, 07:53 PM

The tech sheets show the valve works with an idle vacuum above 7" Most of our stockers or super stockers do not have 7" vacuum idle.

Frank Castros · 01-31-2019, 08:14 PM

Interesting subject, I hope more with contribute to this thread.

Bobby DiDomenico · 02-01-2019, 11:39 AM

Quote:

Originally Posted by Dragsinger

The tech sheets show the valve works with an idle vacuum above 7" Most of our stockers or super stockers do not have 7" vacuum idle.

Who says it has to work? (Or work as the emissions system was designed?;-)
Remember those NASCAR and other intakes with the drilled out mounting studs? This is a lot bigger hole.

Ed Wright · 02-01-2019, 12:41 PM

[QUOTE=Bobby DiDomenico;581432]Who says it has to work? (Or work as the emissions system was designed?;-)

Yeah, and nobody ever clipped a spring, with a restricted engine that, naturally, pulls manifold vacuum @ WOT, right?

Coleydog · 02-01-2019, 02:49 PM

Just like another throttle blade, kinda bad mixture at idle but wide open a good increase, just richen up the jets. Big breather on other valve cover, not much oil spray. Would be interesting to see what cfm goes thru it. I can see why tech would shoot it down.

Ed Wright · 02-01-2019, 05:17 PM

I have heard of guys using epoxy & a drill to convert the PCV hose nipple from manifold vacuum, to "ported" vacuum, which only pulls air with the throttle blades open. Just heard stories about that. Don't really know.

01-31-2019, 05:44 PM	#1
Jeff Stout VIP Member Join Date: Dec 2001 Location: phoenix Posts: 1,486 Likes: 66 Liked 704 Times in 281 Posts	Re: Adjustable PCV Valve I always thought it was a way to build crankcase vacuum. The bonus is the nitro in the oil going into intake charge.

01-31-2019, 07:53 PM	#3
Dragsinger VIP Member Join Date: Jul 2008 Location: Liberty City [East Texas] Posts: 1,760 Likes: 5 Liked 99 Times in 60 Posts	Re: Adjustable PCV Valve The tech sheets show the valve works with an idle vacuum above 7" Most of our stockers or super stockers do not have 7" vacuum idle. __________________ Larry Woodfin 471W

01-31-2019, 08:14 PM	#4
Frank Castros VIP Member Join Date: Nov 2001 Location: The Lowcountry. Posts: 2,954 Likes: 2,538 Liked 2,610 Times in 948 Posts	Re: Adjustable PCV Valve Interesting subject, I hope more with contribute to this thread.

02-01-2019, 12:41 PM	#6
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Adjustable PCV Valve [QUOTE=Bobby DiDomenico;581432]Who says it has to work? (Or work as the emissions system was designed?;-) Yeah, and nobody ever clipped a spring, with a restricted engine that, naturally, pulls manifold vacuum @ WOT, right? __________________ Ed Wright 4156 SS/JA

02-01-2019, 02:49 PM	#7
Coleydog Senior Member Join Date: Jul 2014 Posts: 569 Likes: 36 Liked 53 Times in 38 Posts	Re: Adjustable PCV Valve Just like another throttle blade, kinda bad mixture at idle but wide open a good increase, just richen up the jets. Big breather on other valve cover, not much oil spray. Would be interesting to see what cfm goes thru it. I can see why tech would shoot it down.

02-01-2019, 05:17 PM	#8
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Adjustable PCV Valve I have heard of guys using epoxy & a drill to convert the PCV hose nipple from manifold vacuum, to "ported" vacuum, which only pulls air with the throttle blades open. Just heard stories about that. Don't really know. __________________ Ed Wright 4156 SS/JA