Had a chance to mess with it a bit more today, then put some E85 in the tank. This was on 93 octane and it pulled nearly 5° of timing on this run!!! After adding 26 gallons of E85 and reflashing the PCM with the correct Stoich value I was still seeing tons of knock retard. Banging my head I took some SeaFoam with a HOT engine and ran it through the vacuum hose that ties into the PCV port. I use a vaccum "T" with one leg open as a vent and one in the SeaFoam. Near the end of the can I tried to stall it by putting my finger over the vent side to pull in more. At the same time I cut the key. The engine actually tried to diesel on the stuff. I let the engine sit for a good hour before trying to start it again. After a little cranking with my foot on the throttle it came to life and blew out a monster smoke cloud. I took it for a 10 minute drive and beat the ever living snot out of it. Finally went back to the shop with a hot engine again and did the same with a quart of distilled water. I took it out and drove it again. NO KNOCK RETARD on 31° of advance and a quick advance curve and it absolutely flies now.
This was on 93 before I messed with it!
http://www.youtube.com/watch?v=bpPSgILR6wc
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