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Subject:Re: Porsche water cooling (was Re: longivity of coversion engines)
From:Andrew Grebneff
Date:Wed, 27 Mar 2002 23:30:47 +1200
>  Liquid cooling also allows for four-valve (or five valve)
>heads. The only way Porsche was able to get multi-valve heads with air
>cooling was to water cool the heads (the 959 and 962).

Funny, aircooled Japanese bikes had 4 valves per cylinder way back when!