NASCAR makes more rule changes

NASCAR makes more rule changes: If NASCAR's objective was to eliminate tandem drafting at restrictor-plate racetracks, it remains a work in progress, based on Thursday's first Preseason Thunder test session at Daytona International Speedway. Accordingly, in a meeting with crew chiefs at approximately 5:30 p.m. Thursday, NASCAR announced additional modifications to a restrictor-plate competition package that already had undergone major changes in the offseason. Even though Kyle Busch topped the speed chart in Thursday afternoon's Preseason Thunder test session at Daytona International Speedway at 202.402 mph-in a tandem draft with Joe Gibbs Racing teammate Joey Logano-NASCAR will make the cars faster, less stable and more prone to overheating on Friday. The sanctioning body increased the diameter of restrictor-plate openings 1/32nd of an inch to 15/16ths inches, adding an estimated 26 horsepower to the engines. In addition, NASCAR has lowered the pressure relief valve settings from 30 pounds per square inch to 25 psi and narrowed the grille openings of the cars, thereby decreasing airflow to the engine. Both measures are designed to decrease the number of laps one car can push another without overheating.(NASCAR Wire Service)(1-12-2012)