Firemen plan for this restriction to flow by adding 5 psi to the fire hose pressure per floor above street level. Simply put, the harder the race car launches, the higher the system pressure must be to overcome the effects of gravity that cause restriction to flow. More efficient chassis and tires created the need for more fuel in order to maintain the maximum output power of the engine. As carburetors, manifolds and cylinder heads improved in airflow capacity, the need for more efficient racing fuel systems grew substantially. Todays race cars need more fuel system than ever before because of improvements in torque, RPM and horsepower. Why do you need a high-output, high-pressure fuel system? The additional fuel requirements for nitrous system planning is about. Each time that a nitrous system is engaged, additional fuel supply demands must be met or melted parts may result from "system lean-out." The fuel required is in excess of the. This is most difficult with drag racing vehicles that sometimes have forward acceleration and wheel stand at the same time. Carburetors must have a stable supply of fuel in order to maintain the correct liquid fuel height. 5lb/hp-hr., but it is a good practice to plan and measure fuel system operation using this number. This is a general statement and sometimes engines can be a little more efficient than.
What this means is that for each horsepower produced, it takes ½ pound of fuel. This is sometimes called BSFC (Brake Specific Fuel Consumption). Most engines that are using gasoline burn approximately. The correct volume of fuel is that which is required to support the amount of horsepower that the engine can produce.
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