Daniel,
When I installed my new cam I felt an immediate difference.. and I noticed my seat of the pants weee factor felt strong up to about 6,100 RPM.. before it would fade off around 5,400 RPM or so (turbo probably helped lol)
I have not touched the port work on my P90... when I installed the new camshaft, I went ahead and changed the valve seals and springs.. why not since your in there..
Im sure Jon and Paul would recommend installing some new heavy duty valve springs while your at it.. now you can finally rev your engine wayyy up there!
Hope all is well.. cant wait to see ya at the track again!
Ryan
Oh yeh.. with my new cam and this awesome pressure altitude.. I idle at 800 RPM and 12 in hg