Interesting -
Could the Powder Coat have tightened up some tolerances? That doesn't make
sense; you're getting more gas... Could it flow easier with the P/C? Less
pressure needed to pump the gas through?
Pure speculation...
Carl
-----Original Message-----
From: vafred@erols.com [mailto:vafred@erols.com]
Sent: Wednesday, April 07, 1999 9:14 PM
To: triumphs@autox.team.net
Cc: spitfires@autox.team.net
Subject: carbs
Listers, this winter with nothing more important to do than
sitting
around, I removed the 2 S-U H6 carbs from my T/R 3-A,
completely rebuilt
them including new bushings & shafts. After a very nice P/C
refinish job
on them, I installed them and proceeded to make the
adjustments, I cannot
get the C/O below 8.5% no matter how I adjust them (sm
needle), the idle
is a little on the rough side and the rich mixture smell
abounds I pulled
them back off and rechecked every part for correct
installation, all
seems in perfect working order, still the same results. The
higher the
RPM'S the higher the C/O count also, I install 2 new S-M
needles, same
results. I have a "Gunston Gastester" that has not had much
use and is
only about 4 years old, so off to the inspection station for
the big dyno
state inspec. machine, the C/O now reads 9.4 and higher on
higher RPM'S.
Return home and install S/L (lean) needles, turn the carbs
out 12 flats
(2 full turns) start the car 2.4 C/O, idle is 700 and
smooooth, very
smoooth. I have never run lean needles in these carbs
before, what could
I have possibly done to force this needle change, and yet
the car has
never run or sounded any better than it does now. Any ideas.
"FT"
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