Starting-Line Ratio Calculator

Formula

To calculate the Starting-Line Ratio:

\[ STLR = RER \times TFG \]

Where:

\(STLR\) is the Starting-Line Ratio
\(RER\) is the Rear-End Ratio
\(TFG\) is the Transmission First Gear Ratio

What is a Starting-Line Ratio?

The Starting-Line Ratio (STLR) is a measure used in automotive engineering to describe the initial torque multiplication provided by the combination of the rear-end ratio and the transmission's first gear ratio. It is an important factor in determining a vehicle's acceleration performance from a standstill.

Example Calculation 1

Let's assume the following values:

Rear-End Ratio (\(RER\)) = 3.73
Transmission First Gear Ratio (\(TFG\)) = 2.66

Using the formula:

\[ STLR = 3.73 \times 2.66 = 9.92 \]

The Starting-Line Ratio is 9.92.

Example Calculation 2

Let's assume the following values:

Rear-End Ratio (\(RER\)) = 4.10
Transmission First Gear Ratio (\(TFG\)) = 3.00

Using the formula:

\[ STLR = 4.10 \times 3.00 = 12.30 \]

The Starting-Line Ratio is 12.30.