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    wawaw's Avatar
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    twinport

    ive seen badges on astras and corsa

    what it mean/do?
    need a detailer in south yorkshire?
    http://www.reflectology.co.uk/

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    basically an updated version of each respective single port engine....

    Have a read of this for some gen: http://en.wikipedia.org/wiki/GM_Family_1_engine

    FYI: Twinport variants have the addition of the letter "P" on the engine code to detemine twinport status...

    for instance Z12XE becomes Z12XEP, Z14XE becomes Z14XEP & Z16XE becomes Z16XEP

    If this aint enough info for ya - then do a search as its been covered a few times now.



    Quote Originally Posted by Wikipedia

    TwinPort


    Updated version introduced in 2002, with lighter cast-iron cylinder block and camshaft driven by toothed belt. Features EGR valve and TwinPort variable intake geometry - twin intake ports with a choke closing one of the ports at low RPM, providing strong air swirl pattern for higher torque levels and better fuel economy. The drive belt for the camshafts is wider and stronger than before, and water pump is not driven by it anymore which improves reliability. Turbocharged versions exist.
    • 1.6 L (1598 cc): TwinPort, 79 mm (3.11 in) bore, 81.5 mm (3.21 in) stroke, 10.5:1 compression, 105 hp (77 kW) and 111 ft.lbf (150 Nm) of torque.
    Ecotec TwinPort Family 1 engine is used in:

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