Good point. How is that going to help with having a better mixer when the dual throttle blades are barely open at low highway speeds?
I am trying to get the carb to be more effective at mixing the air/ fuel for better combustion.
Am I going about it all wrong?
It's slightly different angle on the same idea. The problem with the 600 CFM (as you have observed) is that the two primaries 'in concert' offer too much throttle area for the CFM demands of the engine. Hence the partially open throttle plates when cruising. By blocking off one of the throttle bores you have effectively halved the throttle area:
..bore......radius........r-squared............area..............2X
1.5625....0.78125.....0.610351563...1.917475985.....3.83495197
The tapered spacer can achieve the same effect but using both bores:
..bore......radius........r-squared............area..............2X
1.109375..0.5546875...0.307678223...0.966599644.....1.933199288
The stock throttle bore for a 600 CFM is 1 9/16" - the example above tapers/restricts the bores down to 1 7/64.
