GM LUJ engine 1.4L electronic throttle control, sequential multi-port fuel injectors. 72.5 X 82.6mm bore X stroke. Stock GM engine. Turbo: apparently runs around 16 psi according to forum responses on cruze talk (I do not have a boost gauge yet). I could not find anything regarding the turbo specs anywhere, not even the impeller size. I can tell you it is pretty tiny though and produces 148 ft-lb at 1850 rpm.
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