Good stuff, Ernest.
On the dyno runs with my NA 20B, we ran both 92 and 87
octane. There was a very small, but noticeable improvement in performance
at the high end with the 87 octane. We weren’t sure that it could be attributed
to octane, but maybe. This was in the range of maybe 5500 to 6500 rpm;
less than “exceedingly high”.
Al
If
you're running exceedingly high RPM in a non-turbo
application,
LOWER octane may actually produce more power. In this
situation,
the higher octane stuff may still be burning well into the
exhaust
cylce.
Now,
I'm done. My brain is empty.