Let's hear it for the empirical method. I took a (diagnostic) vacuum
guage and connected it to the port on the side of the SU. I suspect
maybe that it is for the crankcase breather. Anyways what the manifold
guage seemed to measure was "piston lag".
It would nominally read a very low vacuum. I'd hit the trottle and the
vacuum would rise momentarily, then back down. If I nailed the trottle
hard, the needle might spike up quite a ways for a fraction of a
second. In retrospect this all makes sense, that the vacuum there
would be highest when the system is out of equilibrium.
I find the list of things that I'm learning to be almost as
interesting as what I'm actually learning. A few months ago I never
realized how much that I didn't know about SU carburettors.
Larry
--
I've found something worse than oldies station that play the music I used to
listen to. Oldies stations that play the "new" music I used to complain about.
lrc@red4est.com http://www.red4est.com/lrc
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