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Catalytic Converter question

To: mgb-v8@autox.team.net
Subject: Catalytic Converter question
From: "James J." <m1garand@speakeasy.net>
Date: Fri, 05 Sep 2003 20:31:21 -0400
In-reply-to: <000801c371cc$fe41d460$c0f24104@dslverizon.net>
References: <3F5418EA.7A1BB22C@pacbell.net> <3F54F88F.000004.03184@james-jewell.ipo.gov> <000801c371cc$fe41d460$c0f24104@dslverizon.net>
Reply-to: "James J." <m1garand@speakeasy.net>
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All,
I've been toying with adding catalytic converters to an MGB-GT that I'm planning on making a daily-driver after a V-8 conversion (w/ closed-loop fuel injection) and restoration. From what I understand, though, unburnt fuel can damage catalytic converters. I know that air-pumps are added to cars starting in the late 60's to inject air into the hot exhaust to allow any un-burnt fuel to combust before entering the atmosphere, long before Cats became mandatory.
So my question is: Does a car w/ Cats require an air-pump, and heads designed for an air-injection rail? Even if the car is running closed-loop? What is the little air-tube on Cats for, and is it required for proper use?
Thanks, and please.. no feline jokes....
James J.

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