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Originally Posted by st-evo-9*corn fed-8urvet*
lol u would think that wouldnt u but suprisingly they havent.....yet lol
i remember the timing on the old evo's was picky if you advanced it more then a few points on 91oct. or else it would knock like bill collector at your door.
but at some point in the evo 10 timing map some degrees are advanced by 50-100% over its evo 9 counterpart this is crazy???
the only differenct in the engine is the aluminum block, a higher comp ration, more boost, .......this is seeming to be a bit of a quagmire on paper but its working in reality.....
did u guys all catch that.....that was me actually being impressed with the evo 10 lol.....damn the world is coming to an end :-(
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Well the bulk modulus of aluminum is radically different than iron, so combustion temperatures could be lower I suppose. The intercooler could be more effecient. It could be direct injection (is it) and maybe they're using some other nifty Porsche like boost tricks with the shape of the intake.
I'm just guessing. But superficially, it's stunning to get over 20psi boost on an 9.5:1 engine on 91 octane, just stunning.