Horsepower adjustments following the NHRA Arizona Nationals event in Phoenix, AZ

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2/27/2018

As the result of runs under the Automatic Horsepower Factoring System (AHFS) 1.20-second under policy at the Phoenix event, the following change has been made.

The horsepower rating for 1986 Chevrolet C-10, entries with the 350 cubic inch engine and a factory rating of 165 currently rated at 222, has been increased by eight horsepower, to 230 horsepower; for Stock Eliminator.

NHRA's 2018 Automatic Horsepower Factoring System outlines that any run of 1.20-seconds or more under the index will receive an immediate index decrease or horsepower increase. These changes are effective Feb. 27, 2018.

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