NASCAR makes another change before Daytona 500

NASCAR is making another change to cars for the Daytona 500,

this one because temperatures are expected to reach 80 degrees

during the season-opening race.

Sprint Cup officials say teams can add an extra inch to grill

openings, allowing more air to flow to engine-cooling

radiators.

The change was made following the final practice session

Saturday and should help drivers keep their engines cooler at

speeds nearing 200 mph around Daytona International Speedway on

Sunday.

NASCAR made three changes earlier in the week, reducing the size

of the horsepower-sapping restrictor plates, adding a

pressure-relief valve to cooling systems and reducing the size of

grill openings. The moves were made to slow downs cars after speeds

topped 206 mph.