Is A 555-Inch Big-Block Engine In Your Future? Get Yours Now

If you’re looking for a great engine for your hot rod, and it has to be a big block, you need to read on. Several years ago, Edelbrock teamed up with Pat Musi to develop “crate engines” for performance enthusiasts. The most recent release touts a 555 cubic inch, 723 horsepower, and 652 ft-lbs of torque (with Pro-Flo 4 XT EFI), monster. The collaboration begins as the engine is built by Pat Musi in his racing facility, using parts provided by Edelbrock. According to Edelbrock, a major key to the power delivered are the CNC-ported cylinder heads manufactured at the new state-of-the-art Edelbrock Race Center.

You have choices when ordering your 555-inch behemoth, as it is available in three configurations: AVS2 carbureted, Pro-Flo 4 EFI, and Pro-Flo XT EFI. We’re told the Edelbrock-Musi 555 Pro-Flo XT is the most powerful naturally aspirated crate engine package in Edelbrock’s line.

big block engine

The Edelbrock/Musi Pro-Flo 4 engine is complete with Pro-Flo 4 electronic fuel injection and is assembled with the intake manifold, fuel injectors, fuel rails and throttle body, electronic engine control unit (ECU), a hand-held calibration module, billet distributor, complete harness, O2 sensor and bung, fuel hose, hardware, and software.

The Pro-Flo system included on the engine has everything needed to bolt it in and go, such as fuel injectors, fuel rails, O2 sensor and bung, throttle body, electronic engine control unit (ECU), and handheld calibration module. The ECU is self-learning, making initial start-up and tuning a breeze.

Engine parameters can be fine-tuned with the handheld calibration module, which means there is no need for a laptop. All three versions of the engine are competition ready, yet, ultra-reliable for daily street use. All three can also be dropped in and used with standard drivelines. The standard-deck block allows the engine to be installed in most cars without hood clearance issues. The exhaust ports are also in the standard location, which allows the use of off-the-shelf headers.

“We see our relationship with Pat Musi and our involvement in the new Race Center as key elements to our future growth”, said Don Barry, CEO of Edelbrock. “We can’t think of a better organization to ally ourselves with, than Musi Racing. Their reputation for building high-performance, reliable engines is legendary.”

big block engine

The Pro-Flo XT version is the most powerful crate engine package in the Edelbrock line and features the Pro-Flo XT electronic fuel injection. The Pro-Flo XT EFI system consists of an intake manifold with a unique design that delivers more horsepower and torque than a traditional single-plane intake manifold. The system also includes fuel injectors, fuel rails, O2 sensor and bung, throttle body, electronic engine control unit (ECU), and a handheld calibration module.

If you’re a serious power enthusiast, there are major advantages to dealing with a combined Edelbrock – Musi produced engine. First, you get the high-quality and high-performance parts that Edelbrock has been proven to deliver, along with the unparalleled knowledge and willingness to help, found within Edelbrock’s Customer Service department.

“Edelbrock is known for its street performance and we are proud of the track record we’ve built with our racing engines”, says Pat Musi. “I have the first prototype 555 engine installed in my personal ‘67 Camaro, the car I started racing with. It hauls ass down the track and has been trouble-free for over 10 years.”

big block engine

The carbureted version includes CNC-ported aluminum cylinder heads, Victor Jr. intake manifold, forged 10.0:1 pistons, forged-steel crankshaft, AVS2 Series 800 cfm carburetor, Rollin’ Thunder hydraulic-roller cam and valvetrain, and Max-Fire ignition system.

If you’re ready to install some serious big-block power in your classic hot rod, it’s about time you check out the Edelbrock-Musi crate engines.

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About the author

Randy Bolig

Randy Bolig has been working on cars and has been involved in the hobby ever since he bought his first car when he was only 14 years old. His passion for performance got him noticed by many locals, and he began helping them modify their vehicles.
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