The use of low profile rear spoilers that reduce over all drag.
Instructions for mod
Remove any existing wing type spoiler or rear cargo rack. Buy or fabricate your aero spoiler and install.
The type of spoiler you are looking for will be small, it will be 5/8 inches long plug or minus 1/4 inch (15mm +/-6mm), 3/4 of an inch seems to be the sweet spot (19-20mm).
The spoiler tilt needs to be about 20 degrees off a vertical axis.
|User Name||Car Make, Model, Year||Cost of Mod||Time to Perform Mod||MPG Before Mod||MPG After Mod||MPG improvement guess||Instruction Link|
|Example Data Saand||Example Data Mazda, 626, 1991||Example Data $5 USD||Example Data 1 Hour||Example Data 27.2||Example Data 29.8||User mod detail or measurement detailed data|
Problems / Consequences of mod
If the rear spoiler is not properly made then it will increase drag.
Flow Field Features and Aerodynamic Drag of Passenger Car <<< Page 26, Rear spoilers