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502HO Off Road Crate Engine with Iron Head and Roller Cam 12568778
Description
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There is no replacement for displacement, and torque is king. With 550 Ft. Lbs. of torque the 502 HO will launch your car harder than you thought possible. With its 450 horsepower and awesome torque the 502 HO may have the best power to dollar ratio going. If your car is all steel, you'll appreciate the power of the 502 HO and if your car is a light weight racer, say 2300 pounds, the 550 ft.lbs. of torque will put a big ol' grin on your face. This engine is awesome.
Starting with a Gen VI four bolt main block, we fill it with forged pistons, forged 4340 steel connecting rods with 7/16" bolts, a 1053 forged steel crankshaft, and a steel roller camshaft. Then we torque down a pair of big breathing rectangular port heads with 2.19" intake and 1.88" exhaust valves. With their 118cc combustion chambers yielding a streetable 8.75 to 1 compression ratio, this engine is ready to rock on readily available pump premium.
We then top it all off with an aluminum dual plane intake manifold and dress the engine with a cast iron water pump, 6 quart oil pan, windage tray, 14" flexplate and torsional damper. So, all you need to do is provide an 750 cfm carburetor, HEI ignition system, headers with 2"x30" primaries and low restriction mufflers and a car with big sticky tires. Sounds simple, and it is. Check with your GM Performance Parts Authorized Center for specific oil pan needs for your application.
The 502 HO requires an electric fuel pump because the 502 Gen VI block has no mechanical fuel pump boss.
The 502 HO is not intended for marine use, and should only be used in 1975 and earlier pre-emissions street vehicles or any year off road vehicles. Equipped oil pan may not clear Chevelle and Camaro applications.
502 HO Technical Information
Horsepower ..................... 450 @ 5250 RPM
Torque .......................... 550 Ft. Lbs. @ 3500 RPM
Max. Recommended RPM ..... 5500
Compression Ratio ............. 8.75:1
Block ............................ 10237292 Cast iron - Four bolt maincaps
Crankshaft ...................... 10183723 Forged steel
Connecting Rods ............... 10198922 Forged steel -Shot peened, 7/16" bolts
Pistons .......................... 12533507 Forged Aluminum
Piston Rings .................... 12524293
Camshaft ........................ 24502611 Hydraulic rollerLift: .510" I, .540" E.Duration @ .050" 211o I, 230o E.
Timing Chain ................... 3891519 Single roller
Cylinder Heads ................. 14096801 Cast Iron118cc Combustion chambers
Intake Valves ................... 14097045 2.19"
Exhaust Valves .................. 14097049 1.88"
Valve Springs ................... 14097002
Rocker Arms .................... 12523976 1.7:1
Intake Manifold ................. 3933163 Aluminum with Holley flange
Torsional Damper .............. 10216339 8"
Flexplate ........................ 10185034 14"
Valve Lash ...................... Net lash
Spark Plugs ..................... MR43T Gap .045#10 Rapid Fire Gap .045
Fuel ............................. 92 Octane
Ignition Timing .................. 36° @ 3600 rpm With vacuum advancedisconnected
Technical Notes:
Distributor, exhaust and carburetor are not included withthis engine.
Clutch linkage boss is cast into block, but must be drilled and tapped. When using cast iron exhaust manifolds, lower head bolts may need to be replaced with bolrts with shorter heads for clearance.For manual transmission applications use flywheel 14096987and a suitable 11" clutch assembly. Distributor P/N 1104067 or melonizeddistributor gear P/N 10456413 must be used on all crate engines with steelcamshafts. Requires electric fuel pump because the GenVI block has no mechanical fuel pump boss. Terms and Conditions
Warranty Information
GM Performance Crate Engine Start-up Instructions
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Products Accessories for 502HO Off Road Crate Engine with Iron Head and Roller Cam 12568778
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