On 1600 the two link arms to each carbs throttle shaft are adjustable for
length. On the 2000's one of the throttle shaft levers (the front carb's I
think) fits directly into the center linkage piece and is directly actuated
by it. The other carbs throttle shaft lever fits into the other side of the
center link loosely (slack above and below). The slack is taken out by an
adjusting screw on the center link. At idle, the throttle shaft lever arms
should be resting on the idle speed screws on each carb such that the
linkage is exerting no force on them. As the throttle pedal is pressed down
the linkage will open one throttle directly but the other can be adjusted by
the screw on the center link (or the length of the arm on the 1600) such
that both throttle plates are open the same amount. Check it by syncing
them at idle and then opening up your unisyn a bit and putting it over each
carb throat at 2500-3000 rpm. They should draw the same amount of air.
If you think it's a dumb set up, try a British car with those convoluted
spring clams to connect the throttle shafts and center link. Yuck
Brian '69 2000
Tampa, FL
http://web.tampabay.rr.com/oilleak/
-----Original Message-----
This makes sense, but what can you adjust at 2,000 - 2,500 rpm that
doesn't impact idle
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