thing about CV (constant velocity or constant depression) carbs is
    that they meter fuel very precisely under all conditions, the next
    best thing to EFI.

Hi Paul, Matt, Gordon, and All

IIRC, CV=  'constant vacuum' or "constant depression"  (ie pressure)

Also, I have seen the float chamber tube connected to the inlet
manifold via the screw needle valve, rather than to the carb venturi.
for a more stable vacuum source.

Slide/needle carbs tend to have a higher flow for a given bore size
because they do not have a butterfly in the airflow; only a slim
needle. According to Mikuni they also have a natural leaning tendancy
with increase in altitude similar to CD carbs; up to about 10K feet.
I like their simplicity, like the PL slide throttle FI. but no reams of
R and D to get through!

FWIW, Dave McC

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