Does anyone have a specific PCV valve replacement they've used with a 1275?
I'm at the "buy a handful and try 'em til one works" stage as World's
Longest Rebuild approaches startup on Sunday.
I'm going with a 1/4 NPT thread into the Cannon manifold flat, with the PCV
valve screwed right into the manifold. I will probably route the valve
cover and timing cover into a "y" with check valves in each line. I was
going to do an ejector line into the exhaust with anti-backfire valves,
etc., but David Anton of APT (Vizard's company) advised against it. He
said they've discontinued offering a similar setup as they could never
really get it to work due to low exhaust velocities. I think it can be
done with a venturi tapped at the throat so you get decent vacuum plus
pressure recovery downstream of the venturi, but I don't have time or $$
for a science project at this point.
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