Callaway Competition USA will miss the next three Pirelli World Challenge races while it switches to a new engine block currently undergoing testing.
Callaway was forced to make the change because the supply of LS9 engines from 2013 upon which its homologation was based has been depleted.
“The replacement engine blocks have just become available and are currently in testing,” team principal Reeves Callaway told Sportscar365.
After missing races at Long Beach, Virginia International Raceway, and Canadian Tire Motorsport Park, Callaway plans to return to PWC competition with the Corvette C7 GT3-R and its newly homologated engine at Lime Rock, Road America, and Watkins Glen.
“We have elected to transfer (driver) Daniel Keilwitz from the U.S. operation to the European operation where he can best help us defend the championship,” Callaway said. “The existing engines will be reserved for the start of GT Masters season.”
Keilwitz had finished fourth and second in his first two PWC starts but had to miss Race 1 at Circuit of The Americas after an engine problem forced the team to buy a replacement block and rebuild it overnight, then finished 19th the next day with co-driver Eric Curran in Race 2 after running out of fuel.
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