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If you are supplying an adequate volume of fuel, you should be able to immediately open all four throttle blades w/o any stumble. That is exactly what a carburetor with mechanical linkage does.
When you slow down secondary opening to match an anemic fuel deliver curve you are reducing engine power and throttle response. That is a left handed solution to a simple fuel delivery problem.
Ed
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Help them do what they would have done if they had known what they could do.
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