you can't go wrong w/ a B18B (LS motor) and turbo it.. bigger displacement, dual cam motor, no vtec to worry about, more torque

better choice than the small SOHC d16y8, torqueless B16A2, and OBD1-headache-causing first gen B16

you Could go w/ the d16y8, but because it's single cam and 1.6L, it has less potential in the long run (imo)

if you swapped a B18C1, you'd only have a $1000 or so left to spend.. so you'd be spending your $5000 on about 130wtq

turbo = TORQUE = good = what you want