Crankcase Ventilation

[eddie c]

I played around with a vacuum balance system on my stocker back
in 1975. Bill Jenkins was experimenting with it and the guys at SRD
who were neighbors ,were selling some of the components to make
systems. I still have some of the origional parts that I got from SRD.
I ran a vbs for a short time ,but I never really gave it a good test.In theory
they are supposed to improve H.P. ed

[Frank Castros]

How about the use of PCV Valves?

[Ron Gusack]

Originally Posted by Frank Castros

How about the use of PCV Valves?

I didn't think a PCV valve would remove oil vapor from being sucked into the manifold.

[Mark Yacavone]

Originally Posted by Frank Castros

How about the use of PCV Valves?

Frank, always use a PCV. It helps to keep some of that expensive light weight oil inside the engine..(No rags needed)
I doubt you would still pull any vacuum at the end of a run though.That's why you need the header hoses and valves.
Of course,..not legal in Stock

[Frank Castros]

Thanks Mark.

I found this image; http://www.aa1car.com/library/pcv.gif

My primary interest in this subject it to maximize ring seal and of course not waste any of those valuable shop rags!

[Dave Gantz]

I wanted to try an old style road draft tube. Never got a chance. Of course it wouldn't do anything until you're moving, but I thought it might be worth experimenting a bit.

[Tylerdax]

how about a brake booster check valve for vacuum and ventilation???

[Mark Yacavone]

Originally Posted by eddie c

I played around with a vacuum balance system on my stocker back
in 1975. Bill Jenkins was experimenting with it and the guys at SRD
who were neighbors ,were selling some of the components to make
systems. I still have some of the origional parts that I got from SRD.
I ran a vbs for a short time ,but I never really gave it a good test.In theory
they are supposed to improve H.P. ed

I assume you meant Super Stock? Stock Elim. was very restrictive back in '75.
I doubt you would have gotten away with anything more than an OEM type PCV back then..
Unless you were just using a Stocker for testing purposes ?

[Frank Castros]

What I'm personally attempting to gain and learn from my initial question, having very limited knowledge of the subject in general and it's application to Stock Eliminator rules is, what is the current set up for the heavy hitters?
Also why does N.H.R.A. not allow valve cover breathers to be evacuated into the header collectors in Stock?

[eddie c]

Originally Posted by Mark Yacavone

I assume you meant Super Stock? Stock Elim. was very restrictive back in '75.
I doubt you would have gotten away with anything more than an OEM type PCV back then..
Unless you were just using a Stocker for testing purposes ?

Mark, I ran it on a 72 Camaro 350ci 4bbl Q-j ,In H/Stock. Anyway I used a std PCV valve on the one side with all the
other openings closed up and on the other side I used an anti backfire flapper valve that I got from SRD, there were no openings in the system
and the crankcase would hold a good vacuum at idle . I did not and could not run hoses to the headers. This may not have been an optimum
system,but I did experiment with it a couple of times. From what I remember I didnt see any improvement ,that didnt mean it didnt have potential though. ed