D 7 to 9 x d. Since the introduction of the ls engine in 1997 there have been several variations of throttle bodies.
Throttle Body With Gasket For 2003 2004 2005 Honda Accord Dx Lx Ex 2 4l 16400raaa62 16400raaa63 16400raaa61
Throttle body measurement. The term throttle has come to refer informally to any mechanism by which the power or speed of an engine is regulated such as a cars accelerator pedal. If the air flow is being measured by an air meter then the tb area vs throttle angle will set the airflow volume and speed thru the air meter. They have ranged from the original cable driven three bolt 78mm all the way up the 90mm electronically controlled four bolt found on the ls3. The primary regulator for throttle pressure comes in the form of the throttle body temperature sensor which measures the temperature of the air fuel mixture entering the fuel injection system of your car. The signal from the actuator is shown and can be downloaded. N engine speed rpm.
This measurement is known as the inlet diameter and is a good measurement to have if you are fitting a cold air intake or supercharger to your current engine. To help determining whether the throttle valve control motor is functioning correctly different deviations from the example signal are mentioned along with possible causes. An engines power can be increased or decreased by the restriction of inlet gases by the use of a throttle but usually decreased. Write the measurement down on a piece of paper. These parameters should be in somewhat a balance. With a lab scope a throttle valve control motor signal voltage is measured with the key on and engine off.
This results in a more gradual response that drivers who are not interested in performance would value because they equate it with smooth drivability. Place a measuring tape against the inlet hole in the throttle body and take a measurement of the inside of the throttle body inlet. Another way to look at this is the throttle body is sized for max airflow and rpm of the engine displacement with some tolerence. This necessary regulation helps spark ignitions generate the most fuel efficiency. The throttle body temperature sensor sorry it doesnt have a cool acronym like the tps is also attached to the throttle body and collects data to permit an efficient burning of fuel. Depending on your application a larger throttle body can provide some additional power.
A throttle is the mechanism by which fluid flow is managed by constriction or obstruction. Weight kg 095 095 095 11 11. Etb applications with flex fuel cng and lpg are permissible if injec ted in the air flow after the throttle body. These formulas are based upon one throttle bore per cylinder. D throttle bore diameter mm. V cylinder displacement liters.
D 8 to 9 x v x n5. Most auto manufacturers measure airflow at peak rpms then choose a throttle body diameter to ensure that 50 throttle will produce exactly 50 airflow. D main venturi diameter mm. Specifically its designed to measure the temperature of the airfuel mixture that flows through the throttle body into the intake manifold and eventually to the combustion chamber. The throttle body is designed to control the fresh air of spark ignition engines in combination with an electronic throttle control system.
Gallery of Throttle Body Measurement
