Quote:
Originally Posted by The Radium King
i wouldn't put too much faith in Porsche aero. look at the airflow through the front bumper cover - it takes the air hitting the three rads and directs it downwards. it actually creates front end lift that increases with speed. uncertain if it was lazy engineering or purposely designed understeer. they fixed it in the 9x7 series (and the 996 gt2/gt3).
it also introduces air under the car. once you have air under the car then you get bernoilli effect (the air traveling over the car and under the car have to get to the back at the same time - the air traveling over the car has to travel a curve vs the straight line under the car so has a longer distance to go - as a result it has to accelerate - this creates a pressure differential between the top and bottom of the car that lifts the car). this lift gets reduced by putting an air dam on the back that disrupts the airflow over the car. caymans have a more aggressive front spoiler and no third radiator so less air under the car, they don't need an air dam and get a wing to create down force instead.
so, really, aero should be done as a package, but given how jacked-up the front airflow is on our cars, I don't think a rear air dam vs wing is going to be a deciding factor in losing control at hwy speeds.
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I put enough faith in it to not worry at high speeds. I don't know about your Boxster but the faster mine goes the more it squats down and hugs the road. I don't experience anything like what you are describing and I'll risk life and limb on the Porsche design before I fall for looks over performance in a product that has yet to disclose any performance tests whatsoever. When they do and it is shown that it works just as well as the dam then I'll buy one as I think the Porsche one, even though it works, looks terribly unfitting on the car.
