Roger,
My GT-6 Mk. 3 is COMM number KF770L. It has a Delco distributor,
not Lucas, and definitely uses a vacuum retard unit. The vacuum unit takes
the vacuum signal from down stream of the throttle plate of the rear
carburetor. It retards the spark to 4 deg. ATDC when the engine is idling.
You should set your timing to 4 deg. ATDC with the engine idling only if
you're certain that your vacuum unit is working correctly.
Bruce Jordan
Virginia Beach, VA
'71 GT-6 Mk.III KF770L (In restoration)
-----Original Message-----
From: Roger Langley [mailto:galahad@uslink.net]
Sent: Wednesday, September 25, 2002 8:28 AM
To: Triumph List
Subject: More about sluggish performance on my GT6
Michael Porter commented "On a `71, you should not have vacuum advance."
The car definitely has a vacuum advance and is a '71 according to the door
plate. So, it looks like I have a switch on the distributor or the engine.
The COMM number is KF1245 I know from the VTR web site that this is a USA
smogged Mark3. But there is a second number on the emissions plate (on tub
by driver's left foot) that says 1083 KF and (This is where I got the 4%
after from) I don't understand that number. I couldn't find a number on
the block casting but it does say "STANPART" which I thought was only used
for replacement parts and not for new.
I am launching into all of this because it seems crucial to find out what I
have in there before I muck around with it or am I being way too fussy? I
don't mind a mix of parts as I am not headed for Pebble Beach; I just don't
want to do damage.
Roger
Saint Paul
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