I saw that competition engines do not use the PCV valve at all, I might go that route upon ridding my A15 from smog dvices soon. Also I read in Des Hammil 's book on rebuilding engines that the PCV system can work in this way. Connect both the valve cover hose... (hose from valve cover to carburetor) ...and block hose(hose from block to PCV valve)... to a single filter breather each, or one for both hoses(could even be a plastic bottle with small openings, I prefer the breather, has a filter element to prevent dust intake) . Both filters(if using a single breather filter for each hose) or the single filter(like a empi air cooled VW breather filter used in VW baja bugs)...or plastic bottle, have to be positioned at least as high as the highest hose, in other words, the breather(s) have to be as high or higher, not lower , than the engine valve cover . Do not connect a small breather filter to the block hose down there, below the valve cover height. The PCV valve then can be taken away and the port closed . This will give the car a cleaner carb (no oily stuff going in there, a tighter intake system,no burnt air going into the conbustion chambers via PCV valve, and direct clean cool fresh air into the crankcase when needed. The PCV valve is an emission device that tries to burn part of the oily stuff that comes out of the engine. 99% of vehicles have a PCV valve, but if performance is your goal, there must be a reason why racers do this with their system.
Jaime.
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Jaime.__________________________