Only available from 2012 to 2013, the S197 Ford Mustang Boss 302 represents one of the high-water marks for fifth-gen Mustang performance. And though the Boss 302 package included vital upgrades to the Mustang GT’s suspension, aerodynamic, and other key systems, the real Boss 302 magic was found under the hood. That’s because the 2012-13 Boss 302 Mustangs got a reworked version of the 5.0L Coyote V8 developed by Ford under the nickname “Road Runner.”
After all—roller skates, ACME rockets, and giant slingshots aside—the only thing faster than a Coyote is a Road Runner.
Borrowing heavily from Ford’s 302R racing program, the end result of Project Road Runner was a 444 horsepower, naturally aspirated monster. If you’re keeping track at home, that made it the most powerful NA V8 motor to ever be stuffed into a Mustang.
In other words, the Road Runner was a perfect powerplant for the upcoming 2012 Boss 302.
But suffice it to say, the Road Runner is far more than a Coyote with a tune. It boasts significant differences from the typical 5.0L Ford Modular V8 in a Mustang GT. Take one apart, and you’ll find things like a revised intake, stronger internals, and totally unique cylinder heads—all necessary to accommodate the Road Runner’s performance diet of high rpm and high compression.
So the Summit Racing tech experts grabbed their notebooks and wrenches, and compiled all the specs and data they could find on the Ford Road Runner V8 engine. See it all below:
Special Hat Tip to Summit Racing’s John Jones, Gary Vicich, and Matt Strebler for their hard work in collecting and organizing this vital information.
***
2012-13 Ford Mustang Boss 302 Road Runner Engine Spec Guide
***
| 2012-13 Ford Mustang Boss 302 Road Runner Engine Performance Specs | |
|---|---|
| Compression Ratio | 11.0:1 |
| Horsepower Rating | 444 hp |
| Torque Rating | 380 ft.-lbs. |
| 2012-13 Ford Mustang Boss 302 Road Runner Engine Application & VIN ID | |
|---|---|
| VIN 8th Digit | U |
| Years | 2012 & 2013 |
| Make | Ford |
| Model | Mustang Boss 302 |
| 2012-13 Ford Mustang Boss 302 Road Runner Engine Block Specs | |
|---|---|
| Casting Numbers | BR3E-6006/6015 |
| Material | Aluminum, Steel Sleeve |
| Displacement | 5.0L (302ci) |
| Bore Diameter | 3.630 in. |
| Stroke | 3.650 in |
| Deck Height | 8.937 in. |
| Bore Spacing | 3.937 in. |
| Thrust Bearing Location | #5 Main |
| Main Cap Style | 4 Bolts with 2 Lateral Cross-Bolts (All 5 Mains) |
| Main Housing Bore Dia. | 2.851 in. |
| 2012-13 Ford Mustang Boss 302 Road Runner Rotating Assembly Specs | |
|---|---|
| Piston Material | Forged |
| Piston Style | Domed, Valve Reliefs |
| Piston Volume | 4.451cc |
| Wrist Pin Diameter | 0.865 in. |
| Connecting Rod Material | Sinter Forged |
| Connecting Rod Style | I-Beam |
| Connecting Rod Length | 5.933 in. |
| Connecting Rod Weight | 618 grams |
| Crankshaft Material | Forged |
| Crankshaft Casting Number | BR3E-XXXX |
| Crankshaft Main Journal Dia. | 2.657 in. |
| Crankshaft Rod Journal Dia. | 2.086 in. |
| Oil Squirters | Yes |
| 2012-13 Ford Mustang Boss 302 Road Runner Cylinder Head Specs | |
|---|---|
| Casting Numbers | M-6050-M50 (Left) M-6049-M50 (Right) |
| Material | CNC Ported Aluminum AL356 |
| Combustion Chamber Volume | 57.5cc |
| Intake Port Shape | Oval with Dimple |
| Intake Runner Volume | 193cc |
| Exhaust Port Shape | Round |
| Exhaust Runner Volume | 100cc |
| Intake Valve Diameter | 1.468 in. |
| Exhaust Valve Diameter | 1.252 in. |
| Cylinder Head Bolt Style | Torque to Yield (TTY) |
| Cylinder Head Bolt Size | 12mm x 1.75 (10) |
| 2012-13 Ford Mustang Boss 302 Road Runner Camshaft Specs | |
|---|---|
| Duration @ .050 in. | 263° (Intake) 290° (Exhaust) |
| Valve Lift | 0.511 in. (Intake) 0.511 in. (Exhaust) |
| Lobe Separation Angle (LSA) | 116° |
| Cam Gear Attachment | 1 Bolt |
| Twin Independent Variable Cam Timing (Ti-VCT) | Yes |
| 2012-13 Ford Mustang Boss 302 Road Runner Valvetrain Specs | |
|---|---|
| Valve Spring Style | Beehive |
| Intake Valve Material | Chrome, Sodium Filled Stem |
| Intake Valve Diameter | 1.468 in. |
| Exhaust Valve Material | Chrome, Sodium Filled Stem |
| Exhaust Valve Diameter | 1.252 in. |
| Other Key 2012-13 Ford Mustang Boss 302 Road Runner Engine Specs | |
|---|---|
| Intake Manifold | Gray Composite, Fixed Runner |
| Throttle Body | 80mm |
| Throttle Control | Electronic |
| Fuel Injector Part Number | BR3Z9F593A |
| Fuel Injector Flow | 34 lbs./hr. @ 58 psi |
| Flex Fuel/E85 Capable | No |
| Fuel Injector Length | 1.900 in. Between O-Rings |
| Fuel Injector Connector | USCAR / EV6 |
| High Pressure Fuel Pump | No |
| Camshaft Sensor Location | Timing Cover |
| Oil Pan | Steel, 7 Quarts, Rear Sump |
| Oil Pump | Gerotor |
| Firing Order | 1-5-4-8-6-3-7-2 |
| Redline | 7,000 RPM |
Great, but can we trust this article?? Clearly they stated and I quote (7 quart oil pan) it’s 8.5-(article states (7000 RPM) it’s 7500, the 302R program spins to 8300rpm those were coyote specs for 2012,so summit got their notepads and took notes? Are you sure you didn’t read the wrong pamphlet? Of course CNC ported heads,2.5 hours per head of porting and forged Pistons,sinter forged rods all correct just saying do your own research.