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Originally Posted by 30 Closed Cab PU
Am just curious,- was this not known in Henry's day? Why was the carb designed restrictive and not as efficient?
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They had problems getting the Hp up to where they wanted it in '27,Harold Hicks during his famous redesign utilized a Zenith in his work to bring the engine from 22hp on the brake to 40hp (valve cooling played a big part too). Ed Winfield was making his downdraft carbs during A production..performance improvements created an cottage industry,an owner could bolt on almost double the power in an afternoon.
Detuning production engines has gone on since the beginning,for a variety of reasons,from longevity to ease of maintenance and reliability.The down draft two barrel emulsion tube Stromberg powered the v8 line from '33 to '37 or so,when Chandler Groves designed the what became the Holley 94,that was used by Ford till 1957. Both are proven carbs and match the flow rate of the model a 200 cuin,V8's were 221 cuin at the time.For those who wish a performance increase without overfueling this setup is hard to beat.Alot of folks use 2 of them,internal improvements can bring the A CFM efficiency up..I personally shoot for the single downdraft modified flathead,it yields great reliability and almost double the performance of the stock A engine.