Reply to "Compression too high?"

wow really Doug?, I run 11 to 1 and have aluminum heads, that allows me or anyone to run on 91 octane. Aluminum does disperse the heat from the combustion chamber, that keeps the charge of fuel from early combustion, pre- ignition knock (pinging) that is why all modern performance engines use aluminum heads, Dieseling can be caused by to hot a plug, to a vacuum leak, or to much timing.the production of horse power is a product of efficiency in air flow through the head, the iron to aluminum head equation? where did you get that? it is not what I have experienced in building many engines. Finally, for guys trying to figure out a way to achieve horsepower, in a street able set-up, some of this can be confusing to say the least, and I would say read, building engines are done everyday without the stuff I have read in this thread and Doug if you can get 600 hp out of a 9 to 1 streetable naturally aspirated 351-C engine your dyno's broken.