Some more NASCAR examples:
- Replacing carburetor restrictor plates with alloy plates that evaporated when exposed to racing fuel
- Drill tiny holes in the wheels so tire air pressure bleeds down below the legal minimum for better traction
- When NASCAR inspectors only used to run template down the length of a car to check the legality of the body, the sides of the car would be "tweaked" to increase the aerodynamics.
Here is a comparison of a stock '66 Ford Galaxie and Smokey Yunick's "Yellow Banana""
http://justacarguy.blogspot.com.au/2...1966-ford.html