The king of all big block crate engines is the ZZ 502/502, with torque and horsepower that will have you grinning and streetable manners that have your competition wondering what hit them.
The ZZ 502/502 represents our latest and best efforts to develop awe inspiring big block power in a dependable, durable and drivable big block crate engine.
With its big valve aluminum heads,, roller camshaft and complete dyno tuned induction and ignition system, this is as close as you'll come to a custom built 502 at crate engine prices. And for those that like to grind on heads, change cams, mill for compression or whatever, we've left it only partially assembled. Make no mistake, everything you need is there, but you don't need to disassemble anything to make head modifications or an intake swap.
It really is the best of both worlds, bolt it together and go, or tweak it to meet your specific needs. It's like someone at GM Performance Parts has been there, and we have. The ZZ 502/502 makes extensive use of aluminum to keep weight down. Including aluminum heads, intake, water pump, and valve covers. Additionally, this king of the crate engines is full of heavy duty parts, to ensure that it will be making awesome horsepower for a long, long time. With its forged aluminum pistons, forged steel connecting rods with 7/16" bolts, forged steel crankshaft, 4-bolt main block, stainless steel valves, 6 quart oil pan, and windage tray, the ZZ 502/502 seems more like a custom race engine.
With a 5800 RPM redline it might just feel more like a custom race engine than a crate engine too. Available as a long block kit or a complete engine kit, the ZZ 502/502 is designed to meet your needs. The base kit includes a fully assembled short block with 2.25" intake aluminum heads, valvetrain, aluminum valve covers, harmonic balancer and 14" automatic transmission flexplate. The complete engine kit adds an aluminum intake manifold, 850 cfm carb, complete ignition system, gear reduction starter and aluminum water pump. Both kits include hardware and gaskets for all parts included in the particular kit.
Finally "some assembly required" is a good thing. The ZZ 502/502 is not intended for marine use, and should only be used in 1973 and earlier pre-emissions street vehicles or any year off road vehicles.
Technical Notes: Do not use bolt sealer on the cylinder head bolts, the holes are blind tapped. The complete engine kit includes the long block kit plus intake manifold, carburetor, distributor, water pump, spark plugs, spark plug wires with looms and additional fasteners and gaskets.
Power: 502 HP @ 5200 RPM, 502 ft. lbs. of torque @ 4200 RPM
Displacement: 502 CID
Bore x Stroke: 4.47” x 4.000”
Compression Ratio: 9.6:1
Recommended Fuel: 92 Octane
Block: Cast Iron, 1 piece rear seal, 4-bolt main caps
Crankshaft: Forged Steel
Connecting Rods: Forged Steel
Pistons: Forged Aluminum
Camshaft: Steel Hydraulic Roller Tappet
Cam Lift: .527” Intake / .544” exhaust
Cam Duration @ .050”: 224 deg. Intake / 234 deg. Exhaust
Lobe Separation: 112 Degree
Cylinder Heads: Cast Aluminum Oval Port
Combustion Chamber: 110cc
Valves: 2.250” Intake/ 1.880” Exhaust
Rocker Arms: Stamped Steel, 1.7:1 Ratio
Maximum GM Recommended RPM: 5800
Ignition Timing: Base 8 degrees BTDC, 30 degrees total
• Fully GM assembled long block
• Black Cast Aluminum Valve Covers
• Oil pump, pick-up and oil pan
• 14” Auto Trans Flexplate
• 8” Harmonic Balancer
• Front timing cover
• Passenger Side RH Oil Dipstick and Tube
General Motors limited 2 year / 50,000 mile parts & labor warranty. Click on Document tab above for full details.