just reading and ran across this.i've known about the engine for a while but thought i would share a little.this would be a good budget build/swap that is smog legal in california.

LG5

The LG5 ("V-code") was a special 3.1 L turbocharged engine produced with McLaren for just two years, 1989 and 1990. It featured the same multi-port fuel injection intake manifolds and throttle body as the LH0, but cranked out 205 hp (153 kW) at 5200 rpm and 225 lbft (305 Nm) of torque at 2100 rpm. Approximately 3,700 engines were produced each year. This engine had a block with more nickel content and hardened internals.

This engine is notable, along with other GM turbo engines of the era (such as that found in the Typhoon/Syclone), for the ease with which significant performance gains can be realized with relatively pedestrian modifications.

Applications:

* 1989-1990 Pontiac Grand Prix Turbo
* 1990 Pontiac Grand Prix STE Turbo


hope this info helps somebody get that HP.