Horsepower = (P × L × A × N) ÷ 33,000

P = cylinder pressure (mean effective pressure in psi)
L = length of the stroke in feet (stroke ÷ 12)
A = piston area in square inches (bore2 × 0.7854)
N = number of power strokes per minute [(RPM ÷ 2) x number of cylinders. 33,000 represents 1 horsepower

Horsepower = (MEP × stroke × bore2 × 0.7854 x number of cylinders) ÷ (12 × 2 × 33,000)”

Now it’s all plug and play!!

Turbocharger- a turbine driven off of the engines exhaust gasses

As you can see the left portion is where exhaust gasses enter and push on the turbine to spin it while a shaft connects the two turbines together thus turning the front turbine to suck in air which later goes to the engine intake

Supercharger- a belt driven device much like a turbocharger that does not use exhaust gasses to turn the turbine but rather a belt from the engine

As you can see here a belt turns the turbine/ scrolls sucking in air into the engine intake

Torque= (horsepower x 5252) ÷ engine rpm

Calculating torque from horsepower

Torque= (horsepower x 5252) ÷ engine rpm

The reason why the constant of 5252 is if you look at dyno charts etc. torque and horsepower always meet at 5252 this is because one horsepower is defined as 33,000 lb-ft / minute. The circumference of a one-foot radius circle is 6.2832 feet. Since these are both constants, you can divide 33,000 by 6.2832 to get 5252. Keep in mind this only happens with imperial units

Or

Power= torque/radius x 2πr(rpm)

Power= torque x 2πr(rpm)

1hp= 33,000 lb-ft / minute

Power= torque x 2πr(rpm)
————————————-
33,000

2π/ 33,000= 1/5252

Hp= ((torque x rpm)5252)

Cylinder Bore- the diameter of a single cylinder

Stroke- the distance the piston travels from the top to the bottom commonly referred to as TDC top dead center and TBC top bottom center

Piston- a short cylinder that fits snug within the engines cylinder which moves up and down against a liquid or gas (in an engine case a fuel air mixture)

Crankshaft- a shaft that turns reciprocating motion of a piston(s) into rotational motion

Rpm- an abbreviation for revolutions per minute, mostly referring to the rotations per minute the crankshaft is spinning

Horsepower- horsepower is a unit of measurement equivalent to 550 foot pounds per second

Torque- a twisting force, in a engine it is the force of the piston turning the crankshaft

Well welcome to my page, this as said in the title will be filled with a plethora of knowledge specifically pertaining to the automotive field. If you would like to see some specifics of thing you would like to see or would help others you can contact me.

Inline engines- engine where all pistons are set one after the other

V type engines- as you can see here the pistons are arranged in a way that they form a v. V type engines can range anywhere from v2 to v12 and even more. (Most commonly known v type Engle is the v8)

Boxer type configuration- as you can see here the middle long oval bump is where the crankshaft would sit. The side offset protrusions are each cylinder housing the pistons along with the heads on top. (The lines accost each cylinder are called heat sinks which dissipate heat when in contact with cooler outside air.

W type engine- envision a v type engine with either another inline engine slapped in the middle of the two or one on each side of those cylinder banks (cylinder banks are the main body of the engine where all the cylinders are lined up)

Rotary type engine- a unique and somewhat common engine where instead of a piston the rotary engine uses an offset triangular shape piece and oval chamber to intake squeeze and expel gasses. The three spaces one large and two small are different stages of its revolution.

Displacement- the volume of all cylinders of the engine added together ex: 5.0 liter – 305 cubic inches – 5000 cubic centimeters

Calculating displacement- what you will need, the bore of the engine, the stroke of the engine, and the number of cylinders. 0.7854 is a constant variable

bore2 × stroke × 0.7854 × number of cylinders