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Cadillac 4.9 Liter PFI V8
Engine specifications


ITEM SPECIFICATION
Bore 92mm (3.623")
Stroke 92mm (3.623")
Piston displacement 4.9 Liter (300 cu. in.)
Compression ratio 9.5:1
Compression pressure at cranking

speed (throttle open)

140-165 psi
Horsepower 200 HP @ 4400 rpm
Torque 275 lb.ft. @ 3000 rpm
Valves  
Face angle 45 deg
seat angle 45 deg
Head diameter - Intake 45mm (1.77")
Head diameter - Exhaust 38mm (1.50")
Rocker arm ratio 1.60:1
Valve Springs  
Free length 49.5mm
Pounds required to compress

to 44mm (1.73")(valve closed)

68-76
Pounds required to compress

to 34.3mm (1.35")(valve open)

214-232
Camshaft Timing (with ramp @ .004" lift)  
Intake opens 21 deg BTDC
Intake closes 257 deg ATDC
Exhaust opens 245 deg BTDC
Exhaust closes 29 deg ATDC
Intake lift (at valve) 9.75mm (.384")
Exhaust lift (at valve) 10.06mm (.396")
Intake duration 278 deg
Exhaust duration 274 deg
Overlap 49 deg


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