ENGINE UNIT


  1. CONSTRUCTION


    1. The cylinder heads, which are made of aluminum, contain a pentroof type combustion chamber. The spark plug has been located in the center of the combustion chamber in order to improve the engine's anti-knocking performance.

    2. The intake ports are on the inside and the exhaust ports are on the outside of the left and right banks respectively.

    3. Upright intake ports are used to improve the intake efficiency.

    4. Taper squish combustion chambers are used to improve anti-knocking performance and intake efficiency. In addition, engine performance and fuel economy have been improved.

    5. Siamese type intake ports are used to reduce the overall surface area of the intake port walls. This prevents the fuel from adhering onto the intake port walls, thus reducing HC exhaust emissions.

      B002NCLC01
      *1 Cylinder Head Sub-assembly *2 Cylinder Head LH
      *a Cylinder Head LH Bottom View *b A - A Cross Section
      *c Intake Side *d Exhaust Side
      *e Upright Intake Port *f Taper Squish
      B002NDC Water Jacket - -

      Tech Tips

      The difference between a siamese type and independent type intake port is shown in the illustration.

      B002MRXC05
      *A Siamese Type *B Independent Type
      *a Exhaust Side *b Intake Side

    6. The cylinder head bolts have been positioned below the camshaft journal in the front of the right bank, and the holes for placing the bolts have been provided above the camshaft journal. Thus, the front end of the right bank has been shortened, resulting in a shorter overall length of the engine.

      B002MYBC01
      *1 Cylinder Head Sub-assembly *2 Cylinder Head Bolt
      *a Shortened *b Camshaft Journal
      B002NKU Engine Front - -