< Previous
  • Ram Jet 502 Big Block Crate Engine Installation
Next >

MSRP

$13,395

Part No.

12499121

Find a Store
Near You

For Off-Road &

For Off-Road &
STREET

6 Select
Available Mods

Power

Power
502
hp @ 5100 rpm

Outrageous style and fuel-injected drivability — all with Big-Block power

The Ram Jet 502 blends the legendary torque and performance of the Big-Block with a modern port fuel injection system and tunnel ram-style high-rise intake manifold. It’s a combination that offers uncompromising performance in a visually stunning presentation.

The unique Ram Jet fuel injection system stands 11 inches tall at its highest point and consists of a two-piece manifold/plenum assembly, eight injectors, a throttle body, and an updated MEFI 4 controller. Setup instructions are included, making it a simple “plug-and-play” installation.

Supporting the unique induction system is a robust bottom end with an all-forged rotating assembly and a smooth hydraulic roller camshaft. The heads are high-flow aluminum oval-port parts from Chevrolet Performance.

You’ll need to check your ride for clearance before closing the hood over the Ram Jet 502. Then again, it looks so impressive, you may just want to cruise around with the hood off!

RAM JET 502 DYNO

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

*Approximate values shown.

RAM JET 502 TECH SPECS

Part Number:
12499121
 
 
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 19170198):
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 12562920):
Aluminum oval port; 110-cc chambers
 
 
Valve Size (in.):
2.250 intake / 1.880 exhaust; stainless steel
Compression Ratio:
9.6:1
Rocker Arms (P/N 12368082):
Stamped steel
Rocker Arm Ratio:
1.7:1
Distributor (P/N 1104060):
HEI type
Throttle Body (P/N 17113524):
Included
Water Pump (P/N 19168602):
Aluminum, short-style
Flexplate (P/N 10185034):
14"
Recommended Fuel:
92 octane
Ignition Timing:
Base 8° BTDC, 30° Total
Maximum Recommended rpm:
5800
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
  • Ram Jet 502 Big Block Crate Engine Installation

    INSTALLATION NOTES

    • The Ram Jet 502 requires a 12-volt power source (and ground), coolant, exhaust system, fuel feed, and fuel return line (to the fuel tank). An in-tank fuel pump is recommended
    • 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
    • Designed for pre-1976 street vehicles or any off-road vehicle
    • Not intended for marine applications
    • IMPORTANT! For a safe, proper, and trouble-free engine break-in, the MEFI 4 computer has a “green” mode that controls rpm during the break-in period. During this period, engine speed is limited to 4000 rpm in the first hour, 4500 rpm in the second hour, and 5500 rpm in the third hour
Next >

FINISH OFF YOUR CRATE ENGINE WITH THESE SELECT PARTS

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

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

Transmission Controller • P/N 19212657

Chrome Water Neck • P/N 12342024

Lightweight Starter • P/N 12606096

Download Catalog

Orange Powder-Coated Valve Covers • P/N 25534374

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

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