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TIMING THE CAM TO THE CRANK

TIMING THE CAM TO THE CRANK. Timing marks facing each other Timing marks a specified number of links apart Timing marks aligned with colored links on the chain Timing marks align with marks on head and block. TIMING THE CAM TO THE CRANK. Match old parts to new ones

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TIMING THE CAM TO THE CRANK

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  1. TIMING THE CAM TO THE CRANK • Timing marks facing each other • Timing marks a specified number of links apart • Timing marks aligned with colored links on the chain • Timing marks align with marks on head and block

  2. TIMING THE CAM TO THE CRANK • Match old parts to new ones • Specificily match keyway and timing mark • Make sure # 1 piston is at TDC when marks are lined up • Off brands are noted for inaccurate timing marks

  3. MANIFOLDS • Intake • Exhaust • Page 206

  4. INTAKE MANIFOLD • Passages are called Runners • Carburator manifolds flow Fuel and Air • Runner size is a compromise • Fuel injection manifolds can have sharper bends • Space below Carb is called the plenum

  5. MANIFOLD RUNNERS • One runner feeding 2 cylinders are called Siamese Runners • Dual Plane Manifold • Single Plane Manifold • Open and Closed Intake Manifolds • Open manifolds require sheet metal valley cover

  6. COOLANT PASSAGE • Passage connects cylinder heads at front of engine • Passage contains provision for the thermostat • Passage provides attachment for thermostat housing • Thermostat housing connects to upper radiator hose

  7. MULTIPLE RUNNER MANIFOLDS • Two or more runners can used with multi valve heads • One runner has a butterfly, that open at a specified RPM

  8. EXHAUST CROSSOVER PASSAGE • Runs under plenum of intake manifold between heads • Heat Riser (one side) closes at cooler tempretures • Forcing all exhaust thru crossover passage heating plenum • Bi-Metal Spring or Vacuum operated • Heated Air Intake

  9. EXHAUST MANIFOLDS • Stock Cast Iron • Headers - Primary tube - Collector • Factory Headers

  10. TURBOCHARGERS • Exhaust driven Supercharger • Draw through • Blow through • Waste Gate

  11. BOOST • Measured in PSI above atmospheric pressure • Turbo Lag • Intercoolers • Lubrication

  12. SUPERCHARGERS • Scroll-type • Roots-type • Draw through • Blow through

  13. PUTTING IT ALL TOGETHER • POWER DEPENDS ON THE EFFICIENCY OF THE PUMP • BHP useable horsepower at the crankshaft • Net HP maxpower all accessories on

  14. COMPRESSION RATIO & ENGINE POWER • Compression ratio effects engine power • Each point of increase is worth about 4%

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