Dave Massey <105671.471@compuserve.com> Wrote:
George, the ZS carbs used on the TR4 had special pins for lifting the
pistons for this test (as do most SU's). As I recall at least one of them
is in an awkward position and is best activated by a screwdriver. Be sure
that the idle is set low enough (800 RPM) that the pistons will be low
enough for the pin to give significant lift. In other words, if the idle
is so hing that the pistons are already ar 1/32 there will be no lift and
you will see no speed change which will be a false indication of correct
mixture.
Good luck
Dave
>>>>>>>>>>>>>>>>>>>>>>>>>>
That is a pretty neat thing about the early strombergs.
(Another is the dirt simple choke mechanism)
I sometimes worry about the pins being a source for a vacuum leak.
I don't think there is much worry about not getting 1/32" of lift.
That is a TINY amount.
I haven't measured it, but the lift pin on TR-4 Strombergs can probably lift it
3/8". And they are both reached pretty easily.
Good luck with it
SCott Tilton
Going home to play with cars all weekend.
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