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Re: [Mgs] "High rev'ing" MGA carb

To: "Robert J. Guinness" <guinness@stclegal.com>
Subject: Re: [Mgs] "High rev'ing" MGA carb
From: "Paul Hunt" <paul.hunt1@blueyonder.co.uk>
Date: Tue, 13 May 2008 15:36:53 +0100
You can't get a high idle, particularly one that revs at 3000 rpm, that can't
be reduced by slackening the idle screw, purely from a vacuum leak.  It's true
that a vacuum leak will make an engine idle faster *for a given throttle
opening*, but you should *always* be able to compensate for that by slackening
the idle screws.  An engine can't run on air alone, if it is running at all
then it must be getting some fuel past the butterfly, so either the butterfly
is open or the fuel is bypassing it in some way.

PaulH.
  ----- Original Message -----
  I'd say if you are blocking 80% that you have an air leak somewhere.
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