for Jack Brabham. In his one-off BT19, it helped him get four consecutive wins and both titles in the nine-races long season, a unique accomplishment for a driver and constructor. This was his third title. The 2,995.58 cc V8 Repco had a bore and stroke of 3.50 x 2.375" (88.9 x 60.3 mm). Initially it gave about . A test bed figure of at 7,800 rpm with torque at 6,500 rpm was obtained. In race trim, about was available. In 1967, the bore and stroke remained unaltered. In that year, bhp at 8,500 rpm was often quoted. A test-bed figure of at 8,300 rpm was recorded. For 1968, a 32-valve version with at 9,500 rpm was planned. Only about at 9,000 rpm was achieved. In 1967 the competition had made progress. Repco produced a new version of the engine, the 700 series, this time with a Repco designed block. Brabham scored two poles early in the year, but then the new Ford Cosworth DFV V8 appeared in the Lotus 49, setting a new pace with its at 9,000 rpm, with Jim Clark and Graham Hill taking all poles in the rest of the season. As the Lotus was still fragile, the Brabham drivers scored two wins each. Brabham used new parts on his cars, which was not always helpful, so Denis Hulme collected more results and the title, followed by Brabham himself, who again won the constructors' title. No success for the double-camshaft 32-valve The new Ford engine, which was made available to other teams in 1968 also, convinced Brabham that more power was needed. With hindsight Brabham commented that the single cam motor's reliability may have been enough to supplant the more powerful Cosworths as late as the 1968 season. A new version of the Repco V8, with gear driven double overhead camshafts and four valves per cylinder, was produced for 1968 to maintain its competitiveness. A figure of at 9,500 rpm was targeted but only about at 9,000 rpm was achieved. The season was a disaster as it proved very unreliable due to unsurmountable valve gear unreliability. There was also a 4.2-litre derivative for the Indy 500. Jochen Rindt, who had moved to Brabham at the wrong time, managed to score two poles and two podiums that year, while Brabham himself collected only two points. The Repco project had always been hindered by the lengthy lines of communication