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RE: TR6 Distributor

To: "Hugh Barber" <tr6nut@sbcglobal.net>,
Subject: RE: TR6 Distributor
From: "Stephen Hanselman" <tr6@kc4sw.com>
Date: Sun, 8 Jun 2003 21:00:03 -0700
Slightly off this topic but does anyone know the temp that the thermo switch
start venting at.  Also is the vent completely shut off below that temp???

thanks

Steve
tr6@kc4sw.com

-----Original Message-----
From: owner-6pack@autox.team.net [mailto:owner-6pack@autox.team.net]On
Behalf Of Hugh Barber
Sent: Sunday, June 08, 2003 7:50 PM
To: Gregory Dito; Seth Glassman; 6 Pack
Subject: RE: TR6 Distributor


Actually, USA-spec Triumphs from about 1972-on used distributors with only
vacuum retard.  The retard unit was routed to a vacuum port that only pulled
a vacuum at idle.  This served to retard the idle timing, while having no
effect (or marginal effect) on engine timing off-idle.  This was for
emissions purposes.  Triumph also used a thermo switch in the circuit that,
in the case of engine overheating, would interrupt the idle vacuum and allow
the timing to be advanced until the engine cooled off a bit.  According to
my Bentley manual. TR6 from 1972 to 1976, used Lucas distributor #41385,
which had centrifical advance and vacuum retard ONLY.  Static timing was to
be set at 12 deg BTDC, with dynamic timing at 4 deg ATDC (@800-850 RPM).

Hope this helps,

Hugh Barber
Hollister, CA
'73 TR6

-----Original Message-----
From: owner-6pack@autox.team.net [mailto:owner-6pack@autox.team.net]On
Behalf Of Gregory Dito
Sent: Sunday, June 08, 2003 6:33 PM
To: Seth Glassman; 6 Pack
Subject: Re: TR6 Distributor


Seth,

Very early TR6 used both, but a 76 only had a vacuum advance.  Typically
auto distributors have an advance, maybe both, but never a retard only.

Greg
CD6250L

----- Original Message -----
From: "Seth Glassman" <76tr6@optonline.net>
To: "6 Pack" <6pack@autox.team.net>
Sent: Sunday, June 08, 2003 7:56 PM
Subject: TR6 Distributor


> List,
>
> Can anyone tell me whether the Lucas distributor on the 1976 TR6 is a
vacuum advance or vacuum retard.
>
> Thanks,
> Seth Glassman
> 76 TR6  CF57223U0

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