< Previous
  • 502 HO Crate Engines
Next >

MSRP

$8,223

Part No.

12568778

Find a Store
Near You

For Off-Road &

For Off-Road &
STREET

6 Select
Available Mods

Power

Power
450
hp @ 5250 rpm

Affordable Big-Block performance with huge torque and 450 hp

With 450 horsepower and 550 lb-ft of torque, our 502 HO crate engine has power on tap for every need — whether it’s a ’69 Chevelle at the drag strip or the Suburban that towed it there!

The 502 HO is all about torque. It hovers just below the 500 lb-ft mark at only 1500 rpm and arcs gently above the 500 lb-ft level by 2800 rpm, remaining there through 4200 rpm. All those axle-twisting pound-feet are rooted in a stronger, updated four-bolt cylinder block that houses a forged steel crankshaft, forged and shot-peened rods, and forged aluminum pistons. In other words, it’s a super-stout assembly that is as durable as it is powerful.

Iron, rectangular-port cylinder heads keep the 502 HO affordable, and our crate engine assembly includes an aluminum dual-plane intake manifold, a water pump, 14-inch flexplate, balancer, and more. You add the carburetor, starter, and ignition system — all available at chevroletperformance.com.

502 HO DYNO

Click on the slider to see the torque and power ratings change with rpm.*

*Approximate values shown.

454 HO TECH SPECS

Part Number:
12568778
 
 
Engine Type:
Chevy Big-Block V-8
Displacement (cu. in.):
502
Bore x Stroke (in.):
4.470 x 4.000
Block (P/N 19170540):
Cast-iron with four-bolt main caps
Crankshaft (P/N 10183723):
Forged steel
Connecting Rods (P/N P/N 19170198):
Forged steel, shot peened
Pistons (P/N 12533507):
Forged aluminum
Camshaft Type (P/N 24502611):
Hydraulic roller
Camshaft Lift (in.):
.510 intake / .540 exhaust
Camshaft Duration (@.050 in.):
211° intake / 230° exhaust
Cylinder Heads (P/N 12562920):
Iron rectangular port; 118-cc chambers
 
 
Valve Size (in.):
2.190 intake / 1.880 exhaust
Compression Ratio:
8.75:1
Rocker Arms (P/N 12523976):
Stamped steel
Rocker Arm Ratio:
1.7:1
Water Pump (P/N 19168606):
Cast-iron, long-style
Flexplate (P/N 10185034):
14"
Recommended Fuel:
92 octane
Ignition Timing:
Base 8° BTDC, 30° Total
Maximum Recommended rpm:
5500
Balanced:
External

OWNER RESOURCES

Already own one, but lost some of the paperwork? We’ve got you covered with downloads and links for some of the more important documents below. You’ll find everything from the vital data about your engine’s capabilities to how to install it into your build, even all of the warranty information should you need to make a claim. And don’t forget, the best way we can make sure to get you the latest information on your specific part is to tell us which one you have by registering your engine. No matter what stage of your build you’re in — from shopping for the right part to that part having turned in a few miles — we have the information you need.

< Previous
  • 502 HO Crate Engines Installation

    INSTALLATION NOTES

    • Requires addition of carburetor, fuel pump, starter, distributor, and ignition system (not included)
    • Clutch linkage bosses are now drilled and tapped. When using cast-iron exhaust manifolds, lower head bolts may need to be replaced with bolts with shorter heads for clearance
    • 502 engines now have a mechanical fuel pump boss!
    • Comes with an externally balanced 14" automatic transmission flexplate. Use flywheel (P/N 14096987) and 11" clutch assembly for manual transmission applications
    • Designed for pre-1976 street vehicles or any off-road vehicles
    • Not intended for marine applications
Next >

FINISH OFF YOUR CRATE ENGINE WITH THESE SELECT PARTS

Download a catalog for a full listing of components and related parts.

502 HO Crate Engines Related Parts 1

SuperMatic 4L85-E Four-Speed
Transmission • P/N 19154550

502 HO Crate Engines Related Parts 2

Carburetor, Holley 770-cfm • P/N 19170093

502 HO Crate Engines Related Parts 3

Fuel Pump, Street Performance (Chevy Big-Block)
• P/N 12355614

502 HO Crate Engines Related Parts 4

Transmission Controller • P/N 19212657

502 HO Crate Engines Related Parts 5

Serpentine Accessory Drive-Belt System with Air Conditioning • P/N 19172805

502 HO Crate Engines Related Parts 6

HEI Distributor • P/N 93440806

  • 1 Performance MSRP The Manufacturer's Suggested Retail Price excludes tax, shipping and installation.
Close

Destination Freight Charges

To allow you to do an accurate price comparison with prices featured on other Internet sites, GM provides Internet pricing both with and without the Destination Freight Charge (see prices including Destination Freight Charge below). To get full pricing details, go to our Build Your Own section.