>Isn't there a special tool that fits down inside the dashpot hole for
>adjusting the jet? I used this tool on my '72 GT6 when it was too rich and I
>couldn't seem to get the mixture lean enough.
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The tool of which you speak is indeed for adjusting the mixture with
adjustable needles on Stromberg carb's. Later GT6's had such needles and
were accessed through the dashpot, as on Spitfires (and most other
Strombergs with fixed jets). These carb's are what I have replaced the
non-adjustable ones on my 70 GT6 with. At the time I replaced them, I
needed the adjustment to pass emissions testing, which I am no longer
required to do, or I would have left the originals on.
The 1969-70 GT6's however, had truly NON-adjustable needles. There is no
access through the damper assy, in fact there is no hole through the damper
piston (yet they still loose oil?? oh where oh where does it go???) . The
needle assy is comprised of a needle, a housing about 3/16 inch in dia x
approx 3/8 long and hollow, with a flattened, or milled spot on one side of
the housing for indexing. The needle is captured inside this housing and
spring loaded so that it will always be sliding, or *biased* against one
side of the opening in the jet. This assy is inserted into the damper
piston, that has a counter bored hole to accept the needle assy, to a point
where the nylon washer is flush with the bottom of the piston. Then you
tighten the grub screw to hold the needle assy in place. There is no
provision to adjust this type of needle - The jet is fixed, unlike the
early examples, and the needle cannot be raised or lowered by any means
while mounted in the carb -
Barry Schwartz (San Diego) bschwart@pacbell.net
72 V6 Spitfire (daily driver)
70 GT6+ (when I don't drive the Spit)
70 Spitfire (someday soon back on the road)
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