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A look inside the 2012 Mustang Boss 302’s 444 horsepower V8

By - February 15, 2011 – 3:42 pm11 Comments | 33,768 views

2012 Mustang Boss 302 Engine

With 444 horsepower on tap the 2012 Mustang Boss 302’s V8 is the most powerful naturally aspirated engine Ford has ever produced. To achieve this was no easy feat, and Ford has done significant upgrades compared to the 5.0L engine in the standard Mustang GT. A unique runners-in-the-box air intake allows for additional air flow, and a fortified valve train allows the engine to run to a 7500 rpm redline. Many of the internal components have been strengthened as well, such as the pistons, connecting rods and the crankshaft.

To give you a better look at exactly how Ford created the Boss 302 engine, we’ve put together a series of photos from a cutout of the engine showing all of the upgraded components.

2012 Mustang Boss 302 Intake
A revised composite intake system takes inspiration from Ford’s Daytona Prototype race engines and features shorter runners for improved air flow in the higher RPM range.
2012 Mustang Boss 302 valves
The exhaust fills have been filled with sodium for improved heat dissipation.
2012 Mustang Boss 302 valvetrain
Lightened valvetrain components provide improved performance and can easily handle the 7500 RPM redline and beyond. Ford’s extensive testing has ensured the valvetrain will hold together for 150,000+ miles.
2012 Mustang Boss 302 Cylinder Heads
New cylinder heads have CNC-machined ports and chambers for better air flow across the entire RPM range. High RPM air flow as been improved without sacrificing low speed torque. The machining process takes 2.5 hours to complete for each cylinder head.
2012 Mustang Boss 302 Pistons
New forged aluminum pistons are up to handling the 444 horsepower as well as the 7500 RPM redline and the 11.0:1 compression ratio.
2012 Mustang Boss 302 Connecting Rods
Upgraded sinter-forged connecting rods are stronger than the standard units in the Mustang GT.
2012 Mustang Boss 302 Crankshaft
A new forged steel crankshaft is built to race-specification and features upgraded rod bearings for a higher load capacity and improved high-speed durability.
2012 Mustang Boss 302 Oil Pan
Revised oil pan baffling improves oil control under racing conditions and during cornering loads greater than 1.0g.
2012 Mustang Boss 302 Engine Oil Cooler
An engine oil cooler allows for improved oil pressure and longer-lasting lubrication during racing conditions.

Photos ©2011 MustangsDaily.com

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