Bump. In the road and for this thread...
Paranoia? Rough spot in engine-feel consistently at around 3500 RPM.
I keep it at around 3K-4K unless in the mountains (or having a little fun around town) but I feel a "rough spot" at around 3500 RPM
.
My IMS "Spidey-sense" keeps kicking in.
I did my budgeting today and since I really don't want to be forced to commute in the Boxster during the Winter (okay, it will be just a little bit of California rain) and stop-and-go traffic- I have decided to buy another old Acura to try and protect my '98 986 (now about 45K mi).
I plan on upgrading the IMS next Spring (and replacing the clutch unnecessarily + going to lightweight flywheel + possibly an RMS).
Just don't feel comfortable driving it hard OR easy...that's pretty tough.
I hoped to be able to do both!!
BTW, Overdrive...thanks for the reply and I find that that the engine sounds better when hitting the throttle fast/hard enough around 4K to hear that intake!! Also better when driving next to something so the sound is reflected 
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