And more on this "off" topic...
When I lived in Portland, Or had a friend named Ken Luthe who was the president of the Porsche Club there (year about '71/'72). He was "well-connected" to the Porsche community .. as he should be, and repeated a story told him by a friend who drove a "stock" 911 at LeMans in about '70 .... "when the 917's would go by at 100mph faster than I was going, it sounded like someone rolling down my window and putting the muzzle of the 12 gauge shotgun to my hear and pulling the trigger". There apparently was just no way to avoid that blast at that speed, and the speed differential was so great that it wasn't doppler-oriented in its sound delivery ... just a very loud blast.
Hard to imagine.
bob> > Completely off topic, but a topic that speaks to me. ;o)> > Porsche 917 motor.> Started life in 1969 at 4494cc (85 x 66) and 580 horsepower @ 8400> rpm. Naturally aspirated.> In 1972, they increased the bore and stroke to 90 x 70.4 for 5374cc> and 660 hp @ 8300 rpm> Last data Paul Frere gives is the 1972 917/10 Bergspyder at 4994cc> and a pair of Eberspacher turbochargers. 950 hp @ 8000 rpm. 690 lb ft> torque. In a 750kg racecar... I saw them race a few times back in the> day. You cannot imagine what brutal cars they were. A thousand> horsepower in a 1700 lb car. Un-effing-believable. Performance> figures: 0-60 mph 2.1 sec., 0-100 mph, 3.9 sec., 0-200 mph, 13.4 sec.> > Source: Paul Frere's "The Racing Porsches" ISBN 0-668-02972-2> > Jim
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