The greatest racing engine of all time. That's a bold claim maybe, but over the course of 16 years from its debut on 4 June 1967, the Ford Cosworth DFV won more than 150 grands prix and was instrumental in revolutionising the way Formula 1 cars were designed.
Astonishingly, the DFV was also the first racing engine that its creator, Keith Duckworth, had designed entirely from a clean sheet.
The statistics behind the naturally aspirated 2992cc 90deg V8 make impressive reading even today. DFV stands for double four valve, because the flat-plane crank effectively gives the same configuration and firing order of two four-cylinder 16-valve engines.
The block was cast aluminium with 'drop-in' cast-iron liners and the two cylinder banks were staggered to avoid the need for forked connecting rods. To keep the engine gas tight, with its 11:1 compression ratio, the cylinder heads were sealed to the block using Cooper mechanical joints – effectively gas-filled steel O-rings.
The four camshafts were gear-driven from the front of the engine, it had dry-sump lubrication and three oil pumps featured, two to scavenge oil from the sump and one to pressurise the oil to a high 85psi.
There were two water pumps and, mounted between the vee, a Lucas mechanical fuel-injection system with eight slide-throttle bodies topped by eight large-intake trumpets. The ignition system was originally a Lucas Opus (oscillating pick-up system) but was soon scrapped in favour of a capacitive discharge system manufactured by German firm Walter Scherag.
The first version produced 405bhp at 9000rpm and 245lb ft at 8500rpm, with the rev limit set at 9500rpm, but there was more to the DFV than its immense performance and spine-tingling soundtrack.
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An enjoyable and enlightening article. I think the follow up (turbo) engine to was the subject of the Brilliant classic 1986 Equinox programme - Turbo - The Cosworth V6 Turbo for the 1986 F1 Season well worth watching for anyone who happens to be reading this article.
I think it probably is one of the greatest racing engines, given that it has powered so many cars in so many classes/formulae over the years.