# How can you tell the difference between an exhaust stroke and a compression stroke?

## How can you tell the difference between an exhaust stroke and a compression stroke?

Compression stroke happens after the intake valve closes. Exhaust stroke happens with the exhaust valve open. Just think about how an engine works and watch both the valves and the piston.

How do you determine the piston position?

Piston Position can be determined from the crank angle from Top Dead Center, knowing the Stroke of the engine, Length of the Connecting Rod and the angle of the Crank. As the Crank Shaft rotates a certain degree, the Piston moves a certain distance from Top Dead Center.

### How do you calculate crank angle?

The Math / Science

How do you measure crank radius?

R = l/a. The final form of the Slider-Crank model is given as a non-dimensional relationship by dividing both sides of equation (6) by Vd.

Noun. crank angle (plural crank angles) (motors) The angle of rotation of a crankshaft measured from the position in which the piston is at its highest point known as top dead center (TDC).

How does a stroker crank work?

A stroker kit increases an engine’s displacement by lengthening the stroke of the piston. The journals along the crankshaft are lengthened by a given distance depending on the severity of the stroke enlargement. An increase in the height of the journal makes for double that increase in stroke length.

## What is the best rod to stroke ratio?

We hear a lot of engine builders shoot for a ratio between 1.5:1 and 1.8:1 on a street motor, with 1.75:1 considered ideal, regardless of application. The most highly developed four-stroke engines in the world ” Formula 1 and motorcycle engines ” have rod ratios of more than 2:1.