I was looking at my last data scan of a WOT run, and I had 4* of timing pulled (39 commanded, 35 actual) at 6200 RPM. I do have some blowby at WOT, haven't done a leakdown test, but a compression test showed between 190-215 psi cold. I am only at 11.7 SCR/9.3 DCR, so not real aggressive on the compression or on the timing, so what would cause knock on E85? Bad batch of fuel, too much blowby, rocker arm noise, something causing false knock, etc?