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Lean Cylinders

To: "fot@autox.team.net" <fot@autox.team.net>
Subject: Lean Cylinders
From: Larry Young <cartravel@pobox.com>
Date: Wed, 14 May 2003 09:00:53 -0500
I've bought a neat dual EGT gauge from Westach for my TR3.  They say to 
install the probes on the leanest cylinders, so I'm trying to figure out 
which ones run leaner.  The firing order is 1-3-4-2, so 1 fires right 
after 2 and 4 fires right after 3.  With a 300 degree cam, the intakes 
valves will be open simulataneously for 120 degrees, i.e. the first 120 
degrees of opening for #1 and the last 120 degrees of opening for #2. 
 I'm thinking that more filling would normally take place during the 
later part of the opening than the earlier part.  This is all well and 
good, but what will this do to AFR?   The answer must be here somewhere. 
 I'm thinking 1 and 4 will run leaner, but the logic is fuzzy.  Help please.
Larry Young

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