Horsepower is measured by a dynamometer, which is a rotor in a housing. So, imagine a horse pulling a wagon of coal out of a mine with 1 horsepower of effort, the horse pulls 330 pounds of coal 100 feet in one minute. It's a perfectly arbitrary amount, but it became the measure of how much work engines could do – no one had ever measured this before. He then increased that amount to 33,000 foot-pounds in a minute, and called it horsepower. He measured how many feet a horse could pull 22,000 pounds of coal in one minute. He wanted to determine how much coal a pony could pull in a wagon over a given length. Watt was working in a mine, using horses to pull wagons of coal.
Watt's work was remarkable, and to honor him, his name was given to the unit of power, the watt (no, he didn't invent the light bulb, but his name is on every one). The idea of horsepower was created by the 19 th century engineer James Watt, who built some of the first steam engines. Check that tires are properly inflated and secured soundly, that airbags are functional, and that the engine is properly tuned and in good shape. Third, ensure that the vehicle is in complete working order, as taking a vehicle to its limits entails certain risks. There are legal places to measure elapsed time, such as on drag strips, rural roads that are privately owned, and during special events that take place at raceways or airports. These activities can endanger not only the driver, but other people as well. Second, do not measure elapsed time on a quarter mile on public streets or highways driving over the speed limit is illegal and the driver's attention needs to be focused on driving, not measuring times. Inexperience can lead to repercussions, some of which can be serious and life-threatening.
#Chevy compression ratio calculator drivers#
First, all drivers need to know exactly what they're doing. When measuring the elapsed time or trap-speed at the maximum work output of an engine, special precautions need to be taken. The speed used should be the speed attained at the quarter-mile point, not the average speed. This method uses the vehicle weight and the speed at which the vehicle finished a quarter mile (402.3 meters) on the formula of Horsepower = Weight×( This calculator will compute the deck clearance for above or below deck applications.įind the engine displacement based on stroke and cylinder measurements.This method uses the vehicle weight and the elapsed time (ET) to finish a quarter mile (402.3 meters) on the formula of Horsepower = Use this calculator to get the approximate piston compression height. Using this calculator, you can obtain the proper ring end gap requirements for KB Pistons using end gap factors from inside the front cover of the KB catalog or on this website in the tech article titled "Special Clearance Requirements for the KB Piston." This calculator will give you the proper piston head volume with a known compression ratio.Ĭonvert inches to millimeters or millimeters to inches. (considers cam timing and rod ratio) This calculator will give you a dynamic compression ratio taking into account cam timing and rod ratio. It will also estimate a dynamic effective compression ratio taking into account the cam timing and rod ratio. (considers cam timing and rod ratio) This calculator will give you the proper compression ratio with a known piston head volume. When this happens the valve reliefs and the pop-up are approximately equal in value. On the piston calculator many times you will come up with a piston head volume that approaches zero. If you do not have the exact gasket bore use the cylinder bore in its place. With some pistons this flat area may be very small (example: Chrysler Hemi is only a line at zero deck). Do not measure to the top of the pop-up or the bottom of a dish.
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