I don't have a TR6 vacuum map in front of me and don't have an EGR on my car
but I believe on most cars, the thermal switch is used to delay EGR and/or
spark advance until the engine has warmed. My understding is that EGR is
actually used to cool the combuston chamber temps. Is it possible that Triumph
designed their thermal switch for a similar function?
Jay Welch
Abington, MA
TR6s
Member Cape Cod British Car Club CCBCC http://www.capecodbritishcarclub.org/
-- "Jeff Fetner" <fetnerj001@hawaii.rr.com> wrote:
I hope this time I can finish the thought before I hit the combination of
wrong keys that sends the message again...
The purpose of the thermo switch was to block the vacuum retard if the
engine overheated, raising the idle and hopefully cooling the engine. Maybe
there's a way to hook the lines so the vacuum is blocked all the time (or
applied only when overheated!) I had a '72 and the thermo switch got so
sensitive it would block the vacuum even at normal temp. I quickly removed
the thermo switch connection and ran a line direct from the bottom of the
rear carb to the retard module. Have you tried that?
I thought the thermo deal was only used from 72-74; what year is yours?
Jeff Fetner
'74
----- Original Message -----
From: "Jeff Fetner" <fetnerj001@hawaii.rr.com>
To: <DaCRANEz@aol.com>
Cc: <6pack@autox.team.net>
Sent: Monday, May 03, 2004 10:23 PM
Subject: Re: vacuum retard
> Mike,
> I read Dick's reply and wonder if the vacuum lines to the thermo switch
> could be hooked up "backwards?
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