At 07:48 AM 6/23/98 -0400, you wrote:
...
>How can i simply(?) determine TDC for the No. 1 cylinder in order to set
>the timing on my beast?...
>Joe
Take an old spark plug, brake the insulator out carefully
and brase a rod in the end of the plug so that the rod extends
about an inch out from the threads. Grind the end of the rod
to a smooth round point. This rod will be used as a piston stop.
Remove all plugs from the motor.
Rotate the motor in the normal direction while holding
your finger on #1 cylinder plug hole. On the compression stroke
there will be some air pressure blowing out. This gets you on the
compression stroke of #1. Stick a rod in #1 plug hole to be sure
there is adequate space for modified plug to screw in without
hitting the piston. Insert the modified plug and slowley turn the
motor (by hand) in the normal direction until stopped by the modified
plug. Mark the crankshaft damper directly under the timing mark
indicator. Now rotate the motor in the oppsite direction until
stopped again by the plug. Make another mark on the damper under
the timing mark. Top dead center will be exactly 1/2 way between
the marks. Some people use a big degree wheel attached to the
crankshaft or damper and make a temporary timing indicator out
of a stiff wire. The idea is the same; but the large degree wheel
makes for more accurate measurments. You may want to repeat the
hand rotations a few times to be sure you have cionsistent marking.
After you find TDC you may want to put a punch mark at
that point or apply a degree tape to the damper.
James Barrett Tiger II 351C and others
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