Compression Height Calculator

Formula

To calculate the Compression Height:

\[ \text{CH} = \text{BH} - 0.5 \times \text{CS} - \text{RL} - \text{DC} \]

Where:

\( \text{CH} \) is the compression height
\( \text{BH} \) is the block height
\( \text{CS} \) is the crank stroke
\( \text{RL} \) is the rod length
\( \text{DC} \) is the deck clearance

What is Compression Height?

A compression height is a term used in automotive engineering to describe the distance between the center of the wrist pin to the crown of a piston. The compression height is a key component in building performance engines in order to get the desired quench.

Example Calculation 1

Let's assume the following values:

Block Height \( \text{BH} \) = 10.5
Crank Stroke \( \text{CS} \) = 4.0
Rod Length \( \text{RL} \) = 6.0
Deck Clearance \( \text{DC} \) = 0.1

Step 1: Calculate the compression height:

\[ \text{CH} = 10.5 - 0.5 \times 4.0 - 6.0 - 0.1 = 10.5 - 2.0 - 6.0 - 0.1 = 2.4 \]

So, the Compression Height is 2.4.

Example Calculation 2

Let's assume the following values:

Block Height \( \text{BH} \) = 9.0
Crank Stroke \( \text{CS} \) = 3.5
Rod Length \( \text{RL} \) = 5.5
Deck Clearance \( \text{DC} \) = 0.2

Step 1: Calculate the compression height:

\[ \text{CH} = 9.0 - 0.5 \times 3.5 - 5.5 - 0.2 = 9.0 - 1.75 - 5.5 - 0.2 = 1.55 \]

So, the Compression Height is 1.55.