Ram Jet 502/502

Outrageous Style and Fuel Injected Driveability 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 TECH SPECS
Part Number:12499121
Engine Type: Chevy Big Block V8
Displacement (cu. in.): 502
Weight: 608
Horse Power: 502
Torque:565
Bore x Stroke (in.): 4.470 x 4.000
Block (P/N 19170540): Cast Iron with 4-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

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 troublefree 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 4,000 rpm in the first hour, 4,500 rpm in the second hour and 5,500 rpm in the third hour 

Ramjet 502 Installation Guide PDF

Ramjet 502 Warranty Detail PDF