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TR6 carb question (long)

To: triumphs@Autox.Team.Net
Subject: TR6 carb question (long)
From: libertyc <libertyc@erols.com>
Date: Wed, 16 Apr 1997 14:37:35 -0700
Organization: Liberty Consulting Group
OK group - I'm stumped, frustrated, and begging for direction.  I've 
never gotten my 75 TR6 to run correctly - it always missed and stumbled. 
It was tired, so I did an engine refresh with redone head, rings, and 
bearings (both con rod and main).  Now my compression is 130 across the 
board.  After starting it up, it still missed badly.  I added the Ignitor 
electronic ignition (thanks rgb), but it only helped slightly.  So, now I 
am almost positive it is carb related. 

Here's why I believe that is the case:  I was able to heavily restrict 
(with my hands) the amount of air going into the carb intakes and get it 
to run much better.  The rpms would raise from 800 to approx 2000, and 
miss would almost disappear.  

Alright - I thought major vacuum leak.  So, I plugged off all vacuum 
hoses to carbs and even covered those holes in the carb's face that 
sometimes allow air to get around the venturi.    (Let me add before I go 
on that I rebuilt the carbs last fall before the refresh.  Shaft seals 
are good - very little if any air leakage.  And plate rotation was clean) 
 So, rpms raised up and it missed less, but it still missed.  I backed 
off the idle adjustment screws all the way and noticed that I cannot in 
any way balance the carbs.  Rear pull is much, much less that front carb. 
 This was a problem even before engine refresh.  I'm quite sure that 
manifold gasket is not the problem.

So, I don't know where to go from here. What am I missing and can you 
think of any reason carbs won't balance?  I sincerely thank you in 
advance.

Carl Huppert
Baltimore

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