Mike--- Ignition timing can cause confusion when one is trying to set it
with vacuum advance and retard lines connected. Sometimes they're not
working, or connected to the right source. (The two pot canisters are
for the early edition TR6s)
I regard "static" timing being done with the engine not running, and
using a test light. It is better by far to use an inductive timing
light, to pick up the actual timing as indicated by the timing pulley
marks.
To hopefully avoid confusion, I prefer to set timing with all vacuum
lines disconnected, and plugged. Then set the timing to what runs best
for that particular engine. As much as 12 deg. BTDC for stockers, and
back as far as 2 deg. BTCD for those with really high cylinder
pressures. Then reconnect the line(s), if you chose.
Dick
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