Listers, sorry this is a long post (and I have read previous posts before
asking) regarding my 1972 Triumph TR6.
My car had Petronix ignition installed by British car shop "A". When they did
it, they plugged off the retard unit at the dizzy and carb and statically timed
the car.
Last winter, I had my carbs rebuilt by Jeff at Paltech (thanks #1 to the list
for this project). He returned them to me, I installed them and then took car
to get dialed in to British car shop "B". They said that the retard should be
connected and then ran the vacuum from the dizzy to straight under the carbs.
At this point, I had no thermostatic switch in the radiator hose because it did
not work, I never have an overheating problem, so I removed it. They tuned the
car to 6 deg BTDC with vacuum plugged and 4 deg ATDC with vacuum connected and
it ran great. At that time, they told me that the carbs were totally leaned
out and that they wanted to tear them apart. I contacted Jeff and he advised
me he had some dealings with British car shop "B" and I should not let them
tear the carbs apart.
This winter I sent my dizzy for rebuild to Jeff at Advanced Distributors
(thanks #2 to the list for this project). He rebuilt the dizzy and I installed
this week. I currently have the dizzy vacuum retard connected to the carb.
Just got off the phone with Dave at TRF regarding a part I was ordering, and I
asked him about this situation. He stated to me that the unit on my dizzy is a
RETARD not an ADVANCE. He is saying I should rubber plug the retard unit at
the dizzy and at the carbs and retune.
So, my question to the list is are people connecting the retard straight to the
carbs and using it? Or, should I plug both the dizzy and carbs and set my
timing to a static 10 deg BTDC (which Jeff at AD just recommended as a starting
point).
Any advice is appreciated! Happly holidays to all!
Craig H. Nicholls
Vienna, VA
1972 Triumph TR6
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