4 basic types...and variations of those

TI- Garret t3 turbo non intercooled..log intake manifold... not much potential 150 hp stock 175 ft lbs

T I- Mitsubish turbo.. less laggy but less flow as well... 2.2L engines from 88 up 150 hp stock 200 ft lbs of torque

T II- 2.2 liter Garret T3 turbo 175 hp 200 Ft Lbs... revs much freeer than the 2.5 engine

T III- 16 Valve head (masserati or lotus design) 225 hp 216 torque... most potential... but extreemly delicate and huge $$$ to fix

T IV- Garret VNT turbo.. no lag hard to mod due to dependence on the exhaust system to regulate the bost pressure.