Why nobody has ever fitted a b18c vtec engine from an MB6 civic and boosted it is beyond me.
Cost of the engine, gearbox, shafts etc and fitting (AWM have done at least 1 into a ZR so can't see it being a problem, plus the MB6 is the same chassis).
Then loads of companies do turbo kits, race tech has a good rep, see link below.
350 bhp on stock internals is considered "safe"
http://www.race-tech.net/index.php?m...products_id=39