Sure can run ron95 with stock b20 or even with a 11.1 comp, tuning is the key... Stock b20 bout 9.6 9.8 to 1 the compression, but some how, new gen b20 if you lucky to get 1, compression is 10:1.. But some how, what i heard is, even u can machine the valve pocket, try not over do it, reliability will be an issue...and my point just now to machine the valve pocket is not to put high cam, it is that stock b20 valve is smaller then those b series with vtec, so the piston valve pocket also smaller as compare to b series vtec.. That is why need to machine....
I believe sometimes i need modern way of doing the engine, but somehow,these fucking experience mech ,old one, their experience seriously cant be underestimated, for example, they fitting bearing, no strip been use, simple torque wrench torque to the number they think ok, turn the crank testing with their magic hands, then ok liao...damn, lot of ppl having oil pressure problem if they do like that, but, none problem for him...what i know is, these guy experienced from doing honda engine repeatly, so i trusted him, somehow many powerful and reliable vtec engine built by him at my place, quite famous though, almost 55years old and do car at own house only....
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And , the old school mach got rehone my block..lol