Thanks everybody! Mike,I distinctly remember that my cranking pressure was right at 185,last spring when I checked it! Even though it runs great on the 92-93 octane,even with 38-40* total timing,I might just "splash" a little 110 in at the track, like Matt suggested. Maybe 1 gal. 110 and 4 gal. 92-93. Just for the track. I usually run the timing around 35-36 on the street,and never notice any detonation whatsoever! Thanks again Guys! Randy B.