Editing Choosing a carburetor

{{newarticle}} ==Selecting carburetor size== The higher the engine can rev, the greater the required CFM. However, bottom end response worsens with increased CFM. ===Based on displacement and use=== For a street engine, a general rule is 1.5 to 1.7 times the displacement equals the necessary carburetor CFM. For a competition engine, it can be up to 2.0 or 2.5 times the displacement. ===Based on RPM and volumetric efficiency=== Another way to figure carburetor size is with this formula: RPM x CID/3456 x VE. (VE = volumetric efficiency). A basic, run-of-the-mill engine might have 85% volumetric efficiency. A well planned-out motor can achieve 100% volumetric efficiency, and finely-tuned racing motors can reach up to 120% volumetric efficiency. ==Selecting carburetor type== ''this section needs additional opinions and confirmation'' Opinions vary on the choice between vacuum secondaries and mechanical ("double pumper"). ==Selecting carburetor brand== ''basic explanation of the various brands goes here. should include: parts availability, quality, difficulty in tuning, price, etc.'' ==References== *http://www.hotrodders.com/forum/carburetor-size-162801.html ==See also== *http://www.ford-trucks.com/article/idx/18/140/article/How_to_Choose_your_next_Carburator.html *http://www.thirdgen.org/pickacarb

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