1975 Datsun 280z FSM - Spooled up Racing

Engine Mechanical
SPECIFICATIONS
Model
L28
a) Valve mechanism
Valve clearance (Hot)
mm (in)
Intake 0.25(0.0098)
Exhaust 0.30(0.0118)
Valve clearance (Cold)
mm (in)
Intake 0.20(0.0079)
Exhaust 0.25(0.0098)
Valve head diameter
mm (in)
Intake 44(1.73)
Exhaust 35(1.38)
Valve stem diameter
mm (in)
Intake 7.965 to 7.980 (0.3136 to 0.3142)
Exhaust 7.945 to 7.960 (0.3128 to 0.3134)
Valve length
mm (in)
Intake 114.9 to 115.2 (4.524 to 4.535)
Exhaust 115.7 to 116.0(4.555 to 4.567)
Valve lift
mm (in)
Intake 11 (0.433)
Exhaust 11 (0.433)
Valve spring free length
mm (in)
Outer 49.98(1.968)
Inner 44.85(1.766)
Valve spring pressured length (valve open)
mm/kg (in/lb)
Intake Outer 29.5/49.0(1.161/108.0)
Inner 24.5/25.5(0.965/56.2)
Exhaust Outer 29.5/49.0(1.161/108.0)
Inner 24.5/25.5(0.965/56.2)
Valve spring assembled height (valve close)
mm/kg (in/lb)
Outer 40.0/21.3(1.575/47.0)
Inner 35/12.3(1.378/27.1)
Valve guide length
mm (in)
Intake 59.0(2.323)
Exhaust 59.0(2.323)
EM-29