Gordon... so if $30K buys you 9K RPM, how much does it cost for 8K? Are RPMs beyond 7K kind of like HP beyond 600...exponentially more expensive?
What about 7500RPM?
I really want a non-stroked SBF turning well over 7K RPM some day. The difference my 408 made in terms of sound from 6K to 6300 was actually enormous. I will never ever take it past 6500, but may put in that chip soon just to see if there is ANY gain past 6300. All the guts are forged, but I don't have an extra 10K laying around to build a new engine tomorrow.
But maybe in a few years, 7500+ RPM. I just think that the Gods would smile on that. How much would that cost?