Joe,
I recently measured the pressure in my valve cover, with and without the
breather hose connected to the carbon cannister (used to be connected to
SU's; can't connect it to Webers). The pressure was negligeable with an
open-ended, 1-metre, 1/2" ID hose on the valve cover outlet; it got no
higher than about 30 mmHg, connected to the cannister. I opted to leave it
disconnected, anyway.
The point I'm trying to make is - you should have negligeable pressure drop
over your breather. Are you sure it isn't plugged?
Allen Nugent
Graduate School of Biomedical Engineering
University of New South Wales
Sydney 2052 Australia
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