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Engineering/Technical Ask technical questions about cars. Do you know how a car engine works?
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Old 11-12-2001, 09:48 AM   #1
AEstud
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Smile valves per cylinder

What is the most valves per cylinder have you ever known about? Im just curious.
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Old 11-12-2001, 11:04 AM   #2
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Audi has a 5 valve cylinder head. Yamaha has a six valve cylinder head.
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Old 11-12-2001, 11:39 AM   #3
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Honda (I believe it was) had an eight-valve per cylinder motorcycle engine in production. It featured an oval cylinder which was basically two cylinders with the walls eliminated. It was quite intriguing.

Six-valve per cylinder heads have been in development for years. Besides the Yamaha engine mentioned, Maserati was working on six-valve heads in the 1980s (although I don't remember any ever going into production).
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Old 11-13-2001, 09:41 AM   #4
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Sounds like a pain in the ass. Makes you wonder why not just strap a supercharger/turbocharger rather than screw with all those valves. In my experience, the mentioned Yamaha head doesn't last long till the valves are burned. I wonder how reliable these heads are in real life.
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Old 11-13-2001, 09:45 AM   #5
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Thanks for the input
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