Double Valve Springs

["Stroes, Gustave" <Gustave.Stroes@xxxxxxx>]

>condition occurs. Each of the two springs has its own standing wave
>frequency, and each spring is designed so that when one of the springs
>is experiencing the standing wave, the other isn't. If we can assume
>that the valve train designer has done his homework correctly, this
>translates into a substantially higher RPM point before valve floating
>(standing waves) occurs. This is one of the many factors that allows
>motorcycle motors and Formula One motors reach such high revs.
>
>Steve Albrecht
>Golden Gate Chapter
>'95 540

Steve,

Excellent post.  However, F1 engines have gone to pneumatic valve springing
for several years now.  They use compressed nitrogen to act as the valve
spring.  Hence the reported 18,000 rpm redlines of some of these engines
(3.0 liters @ 18,000rpm?  Wow!).

Gustave Stroes
88 M3
Redondo Bch, CA

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