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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 • 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 • 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
MANIFOLDS • Intake • Exhaust • Page 206
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
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
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
MULTIPLE RUNNER MANIFOLDS • Two or more runners can used with multi valve heads • One runner has a butterfly, that open at a specified RPM
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
EXHAUST MANIFOLDS • Stock Cast Iron • Headers - Primary tube - Collector • Factory Headers
TURBOCHARGERS • Exhaust driven Supercharger • Draw through • Blow through • Waste Gate
BOOST • Measured in PSI above atmospheric pressure • Turbo Lag • Intercoolers • Lubrication
SUPERCHARGERS • Scroll-type • Roots-type • Draw through • Blow through
PUTTING IT ALL TOGETHER • POWER DEPENDS ON THE EFFICIENCY OF THE PUMP • BHP useable horsepower at the crankshaft • Net HP maxpower all accessories on
COMPRESSION RATIO & ENGINE POWER • Compression ratio effects engine power • Each point of increase is worth about 4%