Camshaft discussion ( Was: the way it responds/D2)

["Dick Benjamin" <DickB@xxxxxxxxx>]

Regarding measuring lift:  If you measure it at the valve stem (which I
agree is the easy way) you are relying on the valve lifter to not leak down
while the spring pressure is pushing it.   Of course this caution is germane
only to those engines with hydraulic valve lifters, but all Imperials after
1950 have those.

If it is not an enormous amount of extra trouble, you can use a dial
indicator directly on the cam lobe or on the body of the lifter, whichever
item you can set up your indicator to ride on, then for valve lift you need
to know the rocker shaft multiplying factor.  If you have a loose rocker
handy, you can measure this, or it is given in some engine spec books.  If
you are careful, you can perhaps measure this right "off your rocker", which
we all are anyway!

Dick Benjamin
----- Original Message -----
From: <mopar@xxxxxxxxxxxx>
> Good morning, D2,
> There is more to a cam than lift spec
 We can determine VALVE lift with dial indicator on tip of
> a valve and rotate motor to cycle cam rotation

 So,, Dim,, go remove your valve covers and get crackin'
> :)
> Robb