 Complete the following phrase:  The FIA doubled the Formula One engine capacity limit to 3 litres for the 1966 season and suitable engines were scarce. Brabham used engines from Australian engineering firm Repco, which had never produced a Formula One engine before, based on aluminium V8 engine blocks from the defunct American Oldsmobile F85 road car project, and other off-the-shelf parts. Consulting and design engineer Phil Irving of Vincent Motorcycle fame was the project engineer responsible for producing the initial version of the engine. Few expected the Brabham-Repcos to be competitive, but the light and reliable cars ran at the front from the start of the season. At the 