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Archive: May 2009
Cosworth DFV Videos from 1981
Posted by Eric Hsu on Friday, May 08, 2009Ken sent me a link to some cool videos from 1981 on the Cosworth DFV Formula engine. These are pretty interesting:
That piston forge you see in the beginning of this video is still in use today at Cosworth UK. I think this was when the DFV was still trying to hold off the turbos.
This video has a pretty good explanation of spring surge and valve float. It illustrates what can happen when somebody tries to save a buck and uses a stock valve spring with a high lift cam and high RPMs. The DFV was before the days of race engine leasing so sometimes teams would try to hot rod the DFV and fail as illustrated with the cylinder head in the video. What was used to visualize the explanation? A Slinky of course. At the 3:00 mark is the late Keith Duckworth (the WORTH in COSWORTH), the master himself.
That piston forge you see in the beginning of this video is still in use today at Cosworth UK. I think this was when the DFV was still trying to hold off the turbos.
This video has a pretty good explanation of spring surge and valve float. It illustrates what can happen when somebody tries to save a buck and uses a stock valve spring with a high lift cam and high RPMs. The DFV was before the days of race engine leasing so sometimes teams would try to hot rod the DFV and fail as illustrated with the cylinder head in the video. What was used to visualize the explanation? A Slinky of course. At the 3:00 mark is the late Keith Duckworth (the WORTH in COSWORTH), the master himself.
