[Fot] TR6 Timing

[Charly Mitchel]

Gary,
The 69 TR6 has a little more complex distributor than what you're 
describing.  It had a vacuum advance and a vacuum retard on the distributor 
and a system that operated the vacuum retard attached to the carbs. It also 
makes a difference where you connect your vacuum pipes.  Some carbs have 2 
places to connect for vacuum. I've attached a page from The Roadster Factory 
blue book showing the vacuum pipes etc.
I guess what I'm trying to tell you is if you don't have this system, which 
you probably don't because everyone took it off, you have to use a later 
spec to set the timing of your car.  The later spec I believe used a quite 
different way of timing.  Anyway, you need to understand which distributor 
you have and vacuum system and set the timing accordingly.  Hope this helps.
http://www.zeni.net/trf/TR6bluebook/51.php

Charly Mitchel
TR6 #44
----- Original Message ----- 
From: <vintage.racer at comcast.net>
To: "Friends of Triumph" <FOT at autox.team.net>
Sent: Tuesday, June 28, 2011 9:26 PM
Subject: [Fot] TR6 Timing


> I've followed the recent series of emails on ignition timing for a TR6. 
> I'd
> like to ask for some opinions on a related issue. I have a 1969 TR6 with
> triple Stromberg carb setup, Lucas distributor with Pertronix and vacuum
> advance. Currently, timing is set at 4 degrees ATDC at 800 rpm with the 
> vacuum
> advance attached which is spec. The engine idles smoothly with good
> acceleration. However, the engine seems to warm up almost too quickly
> according to the water temp gauge and runs a bit warm. New temp sensor and
> another gauge made no difference in the readings. If I warm the car up 
> then
> pull the vacuum line to the distributor there is no difference in idle 
> speed
> and using a timing light, the engine revs freely to about 24 degrees BTDC
> (vacuum advance does not work). Attaching the vacuum line and the readings 
> are
> the same plus I can see the vacuum advance mechanism on the distributor
> working when the throttle is blipped. I'm wondering if the vacuum advance 
> is
> working correctly and if the engine timing is too far retarded resulting 
> in
> the engine running warm while out cruising. Any thoughts? Thanks.
>
> Gary
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