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GM Goodwrench Crate Engine - P/N
12520270
(This engine is not remanufactured,
but contains all new components)
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12520270- 5.7L (LO5-K)
1987-1995 Chevy Full Size Trucks. For
1987-1995 Chevy/Gmc trucks with 350 vin code "K"
engine 8600 GVRW and up
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3 Year/50,000 Mile
Warranty for installation in stock application.
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SPECS ON THIS
ENGINE ARE AS FOLLOWS:
1986 AND UP 4 BOLT MAIN 1 PIECE CRANKSHAFT SEAL
BLOCK( NO MECHANICAL FUEL PUMP PROVISION)
NODULAR IRON CRANKSHAFT
POWDERED METAL CONNECTING RODS
DISHED HYPEREUTECTIC PISTONS
8.75:1 COMPRESSION RATIO
HIGH VOLUME OIL PUMP
MORSE LINK TYPE TIMING CHAIN
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CAMSHAFT SPECS AS FOLLOWS:
FLAT TAPPET HYDRAULIC CAMSHAFT
INTAKE LIFT-.382" * EXHAUST LIFT.402" *
INTAKE DURATION @.050-165.9 * EXHAUST DURATION @.050-174.8
LOBE CENTER SEPERATION -111.9
CAMSHAFT MECHANICAL SPECS:
INTAKE VALVE OPENS @ -30.2 BTDC * INTAKE VALVE CLOSES @ 16.1ATDC
* INTAKE LOBE CENTERLINE - 111.8
EXHAUST VALVE OPENS @ 18.1BBDC * EXHAUST VALVE CLOSES @ -23.3
ATDC * EXHAUST LOBE CENTERLINE - 111.8
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CYLINDER HEAD SPECS:
CASTING NUMBER 14102191
SWIRL PORT INTAKE PORT DESIGN
76cc COMBUSTION CHAMBER
1.94" INTAKE 1.50" EXHAUST VALVE
VALVE SPRING PART NUMBER IS 3911068 (SAME SPRING USED WITH THE
OLD 300H.P 350 CRATE)
INSTALLED HEIGHT 1.70" PRESSURE @ INSTALLED HEIGHT IS 80 LBS *
PRESSURE WITH VALVE OPEN IS 267 LBS.
THESE SPRINGS ARE GOOD FOR .550" LIFT BUT CLEARENCE BETWEEN
GUIDE AND RETAINER MUST BE DOUBLE CHECKED BEFORE ATTEMPTING.
7 BOLT EXHAUST FLANGE
CENTERBOLT VALVE COVER FLANGE
1987-1995 INTAKE MANIFOLD BOLT PATTERN WITH CENTER INTAKE BOLTS
CANTED @ 72 ANGLE
THIS CYLINDER HEAD IS NOT A PERFORMANCE ORIENTED CYLINDER HEAD.
IT IS CLASSIFIED AS A HIGH SWIRL HEAD THAT WAS INTENDED FOR GOOD
BOTTOM END TORQUE AND FUEL ECONOMY. THE INTAKE RUNNER IS
RESTRICTIVE BECCAUSE IT HAS A RAMP CAST INTO THE BOTTOM OF THE
BOWL TO PROMOTE HIGH SWIRL.
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ENGINE ALSO INCLUDES:
4 QUART OIL PAN (5W/ FILTER)
TIMING COVER
8" BALANCER
VALVE COVERS
If you have any questions
or comments regarding this information, please do not hesitate to
contact me at mail@edgesz28.com.
Please visit my webpage for my 1981 Camaro Z28 at
www.edgesz28.com.
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