hey, guys! i got a civic 94 with D15Z2 which i feel it is very slow, i was thinking swap the engine to b18c, is that possible? how much it's cost? what should i buy? My mechanic tell me it's hard to improve engine performance without swap engine because it is not fuel inject? i don't understand what is it mean? i'm supernoob about cars~~. Thank you guys help me out~~!!