Adjusting valves on a Triumph
If you have anything but a stock camshaft in the engine,
the "rule of nines" doesn't necessarily work. Try it
some time. Set a valve using that rule, and then rotate the engine
another 90 deg or so and check the valve clearance again. You
will find that it is several thousandths wide.
I have tried this on three cams - Isky, BFE, and Solow.
I believe that the correct proceedure is
to set the intake as the exhaust starts to
open and the exhaust as the intake is
with mild unreground cams you can be pretty
informal with the "almost".
find a buddy with a twin cam alfa and pull the
cam cover. spin the motor and observe.
playing around w/ regrinds and a degree
wheel has convinced me that the
base circle on these cams often occupies
only a few degree of rotation. I've seen some
amazingly long ramps - friend's TR6 regrind
comes to mind. Anyway, you need to be
very precise when adjusting regrinds as an error
will cause you to have too much lash and that is
a BAD thing for your valve train.
art de armond
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