This may sound crazy, but this is what .050 is about. This comes from the 50's and roller cams and V8's. .050 is the point when the lobe lift reaches the center on a roller lifter, and begins actual effective lift. This began the almost universal use of the .050 number by racers. On a flat tappet V8 cam the number is different but the .050 has other uses. This number is also a effective number when figuring lobe centers, as a number on both sides of a lobe. When degreeing a cam it is easy to use the figure to corrolate lift to crank position, or cam timing. The total duration numbers have to do with the just the cam itself. The actual duration is with the number of degrees of effective lift. The numbers vary do to lifter, or follower design, and size. This may be a little confusing but this is why the .050 duration numbers do not add up by simply adding it back into gross duration. Duration on a Turbo, or Supercharged car are just as effective as a naturaly aspirated car, but overlap is the critical issue. Obiviously the longer both valves are open the more boost you send out the exhaust. This is why people are not getting the results they expected from that "big cam", and the smaller one runs better. Schnieder will grind your cam with the Turbo in mind and it will make a difference from the "off the shelf" one. All this may make sense to some that's all I can ask.
twomuchmoparjunk
88 Quest, 87 Starion
91 Spirit R/T
70 Satellite
64 Polara Convertible
59 Chevy Biscayne (watch the Honda guys when they hear this 7500 rpm suprise)
And many more