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Originally Posted by kcpaz
This doesn't justify the need for an intermediate shaft at all. Obviously there are a LOT of other successful engines out there that don't use intermediate shafts to accomplish proper operation.
Also, can anyone tell me why there was a need to drive the cams from opposite ends of the engine? Again, it seems unnecessarily overcomplicated.
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The reason why the cams are driven from the opposite end of the engine via the intermediate shaft is because Porsche can use the same cylinder head on opposite banks of the engine. If they used the same end to drive the cams, then a "mirror image" second cylinder head design would have to be employed.
Another cost cutting excercise.....
Jakes pictures of the twin cam bevel drive engine is very illuminating - it would have taken a Porsche master tech quite a few hours to select, assemble and shim the componants to spec - something that Porsche wanted to get away from when adding up the assembly hours to produce a financially viable car.
Beautiful engine design though - I hate to think what it would cost to manufacture today though
