S1 S2 Rb25det,,,how To Tell Them Apart

[troubled1]

k this maybe a dumb question but how do tell these engines apart?iv heard s1 hasnt got vct and series 2 does,but how can u tell what its out of,for example i purchased a "s2 rb25det"out of what i was told a "C34",but they ddnt say it was a c34 laurel or a wgc34 stagea,how can i tell which is which?ive noticed my TPS has 2plugs and my ACC valve has 2plugs aswsell...i have the loom ecu and afm for this "s2" and ive put it in my 89 A31 cefiro but stuck on wiring as my factory dash loom does not plug into the "C34" loom next to the ecu....can any1 help me out

[cuttz]

k this maybe a dumb question but how do tell these engines apart?iv heard s1 hasnt got vct and series 2 does,but how can u tell what its out of,for example i purchased a "s2 rb25det"out of what i was told a "C34",but they ddnt say it was a c34 laurel or a wgc34 stagea,how can i tell which is which?ive noticed my TPS has 2plugs and my ACC valve has 2plugs aswsell...i have the loom ecu and afm for this "s2" and ive put it in my 89 A31 cefiro but stuck on wiring as my factory dash loom does not plug into the "C34" loom next to the ecu....can any1 help me out

easy as mate for starters your airflow meter will have a pink sticker on it if its a s2 and s1 engine has a igniter module thats a box looking thing that is located at the end of your rocker covers and s1 i think has a green sicker on the afm. i have a 1993 r33 s1 with a 96 s2 engine so hope this helps. cheers