> So the later SU's (at least, I don't
> know about Zenith-Stromberg) actually had the needle mounted against
> a spring in such a way that the needle was pushed sideways to contact
> the jet wall.
ZS carbs also used spring-loaded needles. However I don't believe it was
done because having a crescent-shaped opening resulted in more even drop
size; but rather because they had to be certain the needles could not be
off-center enough to upset the mixture.
Randall
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