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my plan is to get around 9.8 to one with the j heads they have had a fair amount of work done and that is where the math seems to be leading. I like the info so far, keep it coming please. I like the comp stuff myself and have run many of them but I am open to other stuff as well just hoping there is something out there I had not thought of that could be fun to try. cheers


I have 9.8:1 in my 340. I run the Racer Brown SSH-25. Bit smaller than that ST-21. I'd want to run more compression. Cam's a bit soft on the low end. It was suggested I try a Hughes cam: HEH2832Al. I'll try it out in a few months. We'll see how it works.