The main issue is body composition (see the body fat calculator for more). Calorie expenditure will vary depending on the ratio of body fat to muscle or lean mass. NOTE that as our bodies adapt to exercise and our body composition changes - so will the amount of Calories burned.
The definition of a throttle is a valve that controls the fluid flow. An example of a throttle is a car part that controls how fuel moves through the system. Throttle is defined as to control the speed of an engine or the flow of fuel in an engine, or to hold down or choke.
Confidence votes 161. A throttle body spacer is a small block of aluminum that is bolted on top of a vehicle's throttle body, that has a port or multiple ports in the center of it. Most spacers these days also have either a helical cut along the walls of the port(s) or serrated edges, which help the air/fuel mixture to become more turbulent.