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Re: 3 Angle Valve Seats ...
In a message dated 9/2/99 2:21:49 PM Eastern Daylight Time, firstname.lastname@example.org
<< Audi requires it. The valve seat is ground to three angles in the
> stock engine - a section at 30 degrees to the roof of the combustion
> chamber and a section at 45 degrees to the inside of the port, joined
> by a band 2mm wide for an inlet port and 2.4mm wide for an exhaust
> port. >>
Hmm, interesting. All the Audi heads I have seen in the US only have one
Angle ground on the seat, the actual mating surface itself. In fact, I am
looking at a stock head and a head with a 3 angle side by side right now on
my desk t to confirm it...