1) 2.7l on the Boxster. Porsche is still managing to squeeze out power from this relatively small engine, but why not increase displacement a little? It's amazing they are holding their own in this class while still having barely more displacement than a Honda s2000.
2.9-3.0l would be great for increasing torque, power, and keeping up with the competition.

So why is it that Porsche maintains the smaller displacement for all these years?
2) Does anyone else think Porsche is conservative with their redlines? All 911s, non-turbo and non-Gt3, redline at 7200. A nissan 350z has a redline of 7500. I think that these engines could easily handle 7500 and maintain the same reliability. Stiffening the valve springs won't hurt.
Even the gt3 is conservative with its 8200 redline. An engine like that is Ferrari-esque and should be going to, at minimum, 8500 (like an F430 or a 360)
Is there a reason for this? It would be cool to have a higher redline because it would help me with auto-crossing :-) (I'll explain if you want)
3) This may be a silly question, but what is the reason for the Gt3 using the 3.6l engine instead of the 3.8? Is the 3.6 in the Gt3 completely different than the other 3.6l engines or is it a highly tuned version?
I adore the GT3 and love everything about it, but I think using the 3.8l would help make it a better car (not that it isn't AMAZING already) and make it stand up better in its class. Again, the car probably doesn't need this, but it seems counter-progressive to be using the 3.6 in their flagship model.
Thanks and any insight will be appreciated :-)