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That is because they have flat plane cranks.

Which no one in their right mind would ever put in a production car. Although Lotus did it once - which kind of proves my point really.

Ferrari have flat plane cranks

yeh i get what you mean, waay too impractical for a road going car.

If you are ever sufficiently bored check out the history of the John Wyer's Mirage cars at Le Mans. They used to run DFV's in the 24 hour race & the vibrations just tore everything apart. I would hate to think what happens in a road car.

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