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Re: [TR] Z-S Too Lean

To: Triumphs@autox.team.net
Subject: Re: [TR] Z-S Too Lean
From: <jimmuller@rcn.com>
Date: Mon, 30 Mar 2009 16:34:54 -0400 (EDT)
M. Secrest asked:
> What are some of the suspects for a Stromberg running too
> lean?...And yeah the car runs like a pig up until about 2k
> rpm because I can'tget the mixture right, the one adjuster
> is all the way rich.

The fact that "one adjuster is all the way rich" is very suspicious.  A first 
thought is to check all the electrical components of your carbs, since 90% of 
all carb problems are electrical.  Make sure the timing is okay at idle and 
advances noticeably up through at least 3000rpm.  Also if you're setting timing 
with a vacuum retard in place make sure it is neither stuck nor leaking.  Check 
that the carb dashpot springs aren't broken or deformed.  (Can you get to the 
springs easily on a Z-S?  I haven't looked at a Z-S in a long time.)

One final note, I've found that the traditional techniques for setting mixture 
and carb balance don't work like they are supposed to until you get them 
reasonably close and balanced.  If one is opening much more than the other, 
trying to balance them is a futile exercise.

Jim Muller
'70 GT6 with SU's
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