Subject: Re: [6pack] Distributor Retard (Ed McGuirk)

From: "Walt" <[email-masked]>
Date: Mon, 13 Jan 2014 19:45:42 -0500

The vacuum retard on the TR6 was/is strictly an emission control device. I
believe the retarded spark reduced unburned hydrocarbon emissions. Since it
also causes the engine to run hotter, the thermal switch in the upper
radiator hose interrupts the vacuum above a certain temperature which causes
the idle to increase and cool the engine.

Walt
'74 TR6, presently neglected and in need of love

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