Quote Originally Posted by jdm>usdm View Post
Could someone further explain exactley what valve is being spoken of here? And also, exactley what does the black box on the back of the block do?
the only valve is the PCV valve. The valve when it sees boost from the manifold is going to slam shut and block the air movement from the block to the manifold where it gets resucked in and burned through the engine. The black box is a liquid/vapor seperator, liquid oil collects and falls back into the block while the vapor goes up and through the pcv valve and into the manifold to get burned off and also lower your octane rating haha.