September 15th, 2011 by pressrelease

Vonore, TN – On the heels of the 2012 X-Star launch, MasterCraft and Ilmor jointly announce the official release of Ilmor Marine’s latest power plant, the MV8 7.4L. After successfully launching the Ilmor Marine MV8 line in 2010, Ilmor’s team of engineers was challenged by MasterCraft to develop the next revolutionary engine. The result? The high-performance 522 horsepower MV8 7.4L – the most powerful catalyzed production marine engine available today that offers low emissions with the durability, reliability, and fuel efficiency of the existing MV8 line.

Decades of successful automotive race engine development and production, as well as nearly ten years of High-Performance marine drivetrain design, made Ilmor uniquely suited to take on this challenge. The MV8 7.4L is entirely unique to the water sports world. Every component is manufactured using superior materials, like forged steel, for long-term durability. During development, engines were rigorously durability tested both on dynamometers to ensure performance reliability and in boats by MasterCraft’s professional athletes.

Travis Moye, the famed wakeboard tournament driver and owner of the Boarding School, is completely sold on the MV8 7.4L. “I have been running the 7.4L Ilmor all summer and I have been blown away by the pure power of it,” says Moye. “But, more than the power, I have been amazed by the efficiency. Whether unweighted or fully ballasted, I am running such low rpm’s that I have noticed a huge improvement in gas consumption. Anyone who says a performance block isn’t the way to go hasn’t used this one.”

Ilmor also chose to apply variable valve timing, unusual in engines over 500hp, for overall enhanced performance, providing increased lower end torque and high RPM horsepower. Additionally, the 87-octane compatible, naturally-aspirated engine architecture causes less wear-and-tear on internal engine parts in a fuel-efficient package.

Though not required for emissions compliance, Ilmor elected to deploy an exhaust system equipped with three-stage catalysts on the MV8 7.4L. In fact, the engine produces nearly 70% lower Carbon Monoxide emissions than engines of comparable size and purpose, a major benefit to boarders and surfers behind the boat.

Finally, Ilmor is all about the details. The MV8 7.4L engine is hand-built in the same shop and to the same standards as the racecar engines which have won over 250 IndyCar races and 17 Indy 500s. The result is the game-changing MV8 7.4L engine that will provide huge muscle in an incredibly reliable package and will confidently power MasterCraft boats no matter how much weight aspiring wakeboarders want to throw at it.

The Ilmor MV8 7.4L engine is now available in qualified MasterCraft boats.

ILMOR MV8 7.4L STANDARD FEATURES

At 522hp (390kW), the 7.4L is the most powerful catalyzed production marine engine available today

The superior design and materials of Ilmor-developed internal components provide unsurpassed performance and parts reliability:

Forged steel crankshaft

Forged pistons

Forged steel connecting rods

The naturally aspirated engine architecture provides more horsepower, better fuel economy, and longer parts durability than comparable supercharged engines

The 7.4L conforms to EPA, CARB and EU emissions standards, producing nearly 70% lower Carbon Monoxide emissions than other gasoline engines of comparable horsepower – a benefit for wake surfers and boarders riding its massive wakes

Each engine is hand built to the same quality standards as our IndyCar engines

87 octane-compatible, offering the thrill of high-performance power without breaking the bank

Sophisticated variable valve timing for overall enhanced performance – increased lower end torque and high RPM horsepower

SPECIFICATIONS 
Number of Cylinders 8
Displacement 7.4L
Power Rating 390 kW @ 5800 RPM (522 HP)
Peak Torque 711 N-m @ 4400 RPM (524 Ft-Lbs)
Compression Ratio 10.7:1
Valve Configuration Overhead Valves (2 per cylinder)
Valve Lifters Hydraulic Roller
Firing Order 1-8-7-2-6-5-4-3
Bore and Stroke 106.299 x 104.77 mm
Bore Center 111.76 mm
Engine Weight 1085 lbs (492 kg)
Emissions Controls Catalyst. 02 Sensor. ECU Controlled. OBD-M
MATERIALS 
Cylinder Block Cast Iron
Cylinder Head Cast Aluminum
Intake Manifold Cast Aluminum Upper and Lower
Exhaust Manifold Cast Iron
Crankshaft Forged Steel
Connecting Rods Forged Steel

4 Responses to “MasterCraft and Ilmor Marine Unveil All-New High Performance 7.4L”

  1. jim Says:

    is this engine availible in a salt water series, closed cooled???

     
  2. Oliver Ray Says:

    Right now it is only availible in open cooled. OPS is still under development

     
  3. Mike Machulski Says:

    I see the firing order is the same as GM’s current V-8 platform. Is this a variant of the 7.0 Vette small block or a destroked 8.1L block? I suppose since the 502 was purchased, the 454 trademark was for purchase also. If that is the case with a 4340 new firing order crank and VVT, and not in the hands of the men who chase swedes. You have my respect and admiration either way. Finally someone actually used a fresh idea and creativity!!!!!!!

     
  4. Mike Machulski Says:

    After a tiny speck of valve cover popped up it looks like an LS Platform.

     

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