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smurf, sorry i didn't know you wanted to boost it eventually if you want that then yea forged internals and if you do a b20 sleeve it becasue the sleeves are kinda thin
umm well you can build a ls/vtec or b20vtec for whatever you want, the limiting factor in revibility with a motor is the rod stroke ratio and for a ls/vtec or b20vtec the rod/stroke isn't all that great (1.54), you end up with essentially the same redline you have with a regular b18a/b block, the head doesn't let you rev higher. building an engine like the one i described is essentially a type r but better (r/s ratio 1.77), its an over square engine layout which is where the bore is greater then the stroke of the crank, formula one engines are designed this way, and let you rev much higher, and in a vtec engine, vtec usually engages at higher rpm's and your power band is much higher then in a non-vtec block/engine, i've never actually used this set up in an engine yet, (thats my next project) so i don't have much to claim about how great it is besides the good r/s ratio(no hp or tq numbers to show sorry fellas), but most of the time people rev their ls/vtec too high and end up destroying the bottom end, to me this is an all oem solution to it... kinda
umm other then that in my opinion its just a good set up...