> First, I assume that I can't just remove the valve, and run
> some kind of hose/catch tank from the valve cover, or can I?
Sure, that will work as well as the original system did.
> Another option is to feed the crankcase into the air
> cleaners, like was done on the TR4. Again, does this provide
> much "suction"?
Doesn't really provide any suction, but again, works OK.
> Installing the draft tube really isn't an option, unless
> someone has a trick to remove the plug with the engine still
> installed.
Haven't tried it myself, but it shouldn't be too hard. Drive a screwdriver
through it and pry it out.
> So, has anyone "been there, done that" on this? Or have any
> other ideas?
As long as there is a nice, big tube available, the blowby gases will push
themselves out of the crankcase and things will work reasonably well. There
is no practical advantage to pulling a vacuum on the crankcase (or at least
not enough to worry about).
However, IMO, the optimum setup is a true positive crankcase ventilation
system, meaning there must be a fresh air intake as well as a vacuum
connection. That way, fresh air is constantly being pulled in to replace
the blowby gasses, which reduce the tendency for acids & varnish to condense
out before they leave the crankcase. The fresh air intake should be
filtered (to avoid pulling in dirt and dust with the air); and should also
provide for reverse flow for WOT operation. But, this is a lot of extra
effort for not much practical gain : less pollution and perhaps slightly
longer engine life.
Randall
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