In message <34BF9E76.B0D49C03@MCIONE.com> four.rings@MCIONE.com writes: > You're right, Jouko. It_will_be negative according to the Bernoulli Law. > I'd use the hood vents for exhaust rather than intake. That's what the Sport uses them for. -- Phil Payne Committee Member, UK Audi [ur-]quattro Owners Club