[OrbitalEllipses]

Originally Posted by Hanzo

Cayman R has the same dip on the curve wonder if it's something to do with the flat engine. Here is the chart, it's on page 17: http://files.porsche.com/filestore.a...ault&version=3

On NASIOC, the dip was attributed to intake manifold design. Wonder if people are replacing intake manifolds on their Caymans to any effect. Likely a combination of that and what ZDan is saying, though I can't claim any verity on the intake manifold statement.