Page 104 of GM Performance Parts 2006 Catalog by GM Parts Direct
CRATE ENGINES BIG-BLOCK
Build-it-yourself kit of GM Performance Parts 502" Rat!
Get this beast in a box and then finish it to your satisfaction! GM Performance Parts has put together the ZZ502 Base
as a convenient partial engine assembly. You get the big-block V-8, four-bolt main muscle and just enough of the finish
work to take the headache out of choosing parts without missing out on the fun stuff!
The Base Engine, which boasts 4.47 bores and is stroked to 4.00 , comes with aluminum, oval port cylinder heads with
generous 110 cc combustion chambers. Its big time valvetrain features 2.25 intake and 1.88 exhaust valves to keep it
breathing easy! The crankshaft is forged steel and is paired up with a hydraulic roller camshaft for great performance.
All you need to add is attitude and an intake manifold, carburetor, water pump, distributor and plug wires. Everything
but the attitude is available from your GM Performance Parts dealer.
12496963
ZZ502/502 Base
102
GM Performance Parts does not utilize any used
or remanufactured parts in this crate engine.
GM Performance Parts crate engines include
a twelve-month, 12,000-mile warranty.
W
ZZ502/502 BASE ENGINE TECH SPECS:
Part Number:
12496963
Engine type:
Chevy big-block V-8
Displacement (cu in):
502
Bore x stroke (in):
4.47 x 4.00
Block (P/N 10237292):
Cast iron with 4-bolt main caps
Crankshaft (P/N 10183723):
Forged steel
Connecting rods (P/N 10198922):
Forged steel, shot peened
Pistons (P/N 12533507):
Forged aluminum
Camshaft type (P/N 12366543):
Hydraulic roller
Camshaft lift (in):
.527 intake .544 exhaust
Camshaft duration (@.050 in):
224 intake 234 exhaust
Cylinder heads (P/N 12363390):
Aluminum oval port; 110cc chambers
Valve size (in):
2.25 intake 1.88 exhaust; stainless steel
Compression ratio:
9.6:1
Rocker arms (P/N 12368082):
Stamped steel
Rocker arm ratio:
1.7:1
Recommended fuel:
92 octane
Ignition timing:
8 BTDC 800 rpm; 36 total 5000 rpm
Maximum rpm:
5800
NOTE: Distributor with melonized steel gear MUST be used with long blocks and partial engines with steel camshafts, or engine damage
will occur. GMPP distributor P/N 93440806 is recommended.
WHATS HOT?
502 horsepower
Forged steel crank
Four-bolt mains
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