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-   -   Crankcase Pressure (https://classracer.com/classforum/showthread.php?t=62291)

Camarob859 05-24-2016 10:20 PM

Crankcase Pressure
 
Whats the best way to get rid of crankcase pressure with out a pan evac system for a small block stocker??

mike britt 05-24-2016 11:09 PM

Re: Crankcase Pressure
 
Go get you an electric air injection pump off a toyota or gm and build a scavenge tank with a breather. Cheap and easy and fairly effective.

HandOverFist 05-25-2016 07:10 AM

Re: Crankcase Pressure
 
My low buck solution and legal...

http://i434.photobucket.com/albums/q...pszynexfmq.jpg

V M Kauffman 05-26-2016 12:29 PM

Re: Crankcase Pressure
 
The better the engine is sealed up the less Blowby you will have which equals less Crankcase Pressure you will have. If the engine is a wet sump you can measure the Blowby with a good Blowby meter. Low leak down readings do not equal low Blowby.anything over 2cfm is too much.

Glenn Briglio 05-27-2016 09:14 AM

Re: Crankcase Pressure
 
Quote:

Originally Posted by HandOverFist (Post 504344)

What does this do?

HandOverFist 05-27-2016 11:35 AM

Re: Crankcase Pressure
 
Quote:

Originally Posted by Glenn Briglio (Post 504556)
What does this do?

Just a simple path for pressure to escape.

Ron Gusack 05-27-2016 11:58 AM

Re: Crankcase Pressure
 
If you have the valve cover connected to the fuel pump block off I don't think you're doing anything. They see the same pressure. I use manifold vacuum through the base of the carb and run a vacuum gauge to measure pan vacuum. It's not great but I do pull about 5 inches at the starting line. That's with both crank seals in the correct way.

Ron Gusack 05-27-2016 12:00 PM

Re: Crankcase Pressure
 
Quote:

Originally Posted by mike britt (Post 504339)
Go get you an electric air injection pump off a toyota or gm and build a scavenge tank with a breather. Cheap and easy and fairly effective.

Is this what they call a secondary air pump?

Glenn Briglio 05-27-2016 12:10 PM

Re: Crankcase Pressure
 
Quote:

Originally Posted by mike britt (Post 504339)
Go get you an electric air injection pump off a toyota or gm and build a scavenge tank with a breather. Cheap and easy and fairly effective.

No bueno..........not legal in stock eliminator

HandOverFist 05-27-2016 12:24 PM

Re: Crankcase Pressure
 
Quote:

Originally Posted by Ron Gusack (Post 504578)
If you have the valve cover connected to the fuel pump block off I don't think you're doing anything. They see the same pressure. I use manifold vacuum through the base of the carb and run a vacuum gauge to measure pan vacuum. It's not great but I do pull about 5 inches at the starting line. That's with both crank seals in the correct way.

Ron - The valve cover is vented to atmosphere...the crankcase only in a torturous way. I only configured a more direct route.

Btw, the above images do not show that a breather is used on the passenger side cover. No breather/sealed on the driver side.

http://i434.photobucket.com/albums/q...psrhlj11ox.jpg


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