Building The Twin-Turbo Godzilla Giveaway Engine At The PRI Show

Building The Twin-Turbo Godzilla Giveaway Engine At The PRI Show

There’s a meme that is perpetually making its rounds on the internet poking fun at where you think a 1,000-horsepower engine is built (with a photo of a laboratory clean room) versus where 1,000-horsepower engines are actually built (with a photo of parts being hosed off on grass). While that’s a funny joke, the truth is, we took one of the nation’s top engine builders and pulled them out of their normal assembly environment, in order to build our Summit Racing 1,000-horsepower twin-turbo 7.3-liter Godzilla giveaway engine live on the floor of the Performance Racing Industry Show in Indianapolis, Indiana in early December 2022.

As we’ve discussed previously, we’re building this 1,000-horsepower monster to give away to a lucky winner through www.EngineLabsGiveaway.com. We’ve teamed up with Late Model Engines and Ford Performance Parts, as well as our presenting sponsor Summit Racing and a host of other partners, to take this engine from a basic crate engine off the factory assembly line to a twin-turbo beast, ready to power someone’s project car. So let’s look at the parts we used to take the engine from a block and a bunch of boxes to a complete engine in our booth.

EngineLabs Giveaway Engine block

The factory Godzilla block is an interesting, robust design. The modern features incorporate both strength and weight savings. Summit Racing, our presenting sponsor, not only sells the Godzilla crate engine and components but also all the parts you need to swap the engine into your ride of choice.

A Big-Block Base

The basis of this whole project is one of Ford Performance Parts’ 7.3L crate engines, right out of the catalog. We dynoed the engine in its base form (you can see the results of that test, here) before we disassembled the engine and shipped it off to the Indiana Convention Center in order to be transformed into the twin-turbo beast we’re giving away.

As a base, the OEM Godzilla block is a great core upon which to build. It’s a cast-iron block with a semi-closed deck design offering significant support to the cylinders, as cast. The engineers at Ford have machined slots in the deck in between each cylinder to enhance coolant flow and prevent hot spots, while on the underside, the main caps feature a robust six-fastener design (four vertical bolts and two side bolts per cap).

While we upgraded to Energy Manufacturing's billet main caps, we retained the OEM main bearings, as they should be capable of handling what we throw at it.

The OEM caps were replaced by a set of billet-steel main caps from Energy Manufacturing along with a main stud kit from OptiTorque. Both parts are made from high-strength steel, improving the power-holding ability over the factory parts and providing insurance for us while we more than double the factory output. Secured in the mains is the factory 3.976-inch stroke crankshaft.

EngineLabs Giveaway Engine main studs

The OptiTorque main stud kit will provide additional strength to the billet main caps, making for what should be a bulletproof bottom end.

It’s a forged unit from the factory with incredible machining, and has proven to be more than capable of holding the power we’re going to be throwing at it. Interestingly enough, we not only used OEM Ford main bearings, but we REused the ones that came with the crate engine. They only had initial dyno time on them, and they came out of the block pristine, so there was no reason not to reuse them.

Hanging off of the crank is a set of K1 Technologies’ forged 4340 steel H-beam rods. Measuring in at 6.319 inches, center-to-center with a 2.236-inch big end with a set of MAHLE H-series 2.086-inch rod bearings. (Does that number look familiar? It should, since the rod-journal diameter is the same for a Coyote and a Godzilla.) The rods come weight-matched out of the box. The pin end is a beefy .990-inch diameter, and the double-rib cap is fitted with 7/16-inch ARP2000 rod bolts to hold significant power.

EngineLabs Giveaway Engine connecting rods

K1’s forged 4340 H beams have ARP2000 rod bolts and will handle all the stresses we throw at them. They use the stock wrist pin and big-end diameters, so no specialty bearings are needed.

Hanging off of those rods are a set of Wiseco 4.220-inch forged 2618 pistons built for boost. The 2618 alloy is designed to be stronger under increased combustion pressure, while the 22.0cc inverted dome design keeps the stock compression with the worked-over cylinder heads. The skirts are coated to reduce friction and the pistons come with a heavy-wall .990 wrist pin from Trend Performance. The pistons also come with a .043-inch/.043-inch/3.0mm ring package, as well as oil support rails, since the wrist pin intersects the oil ring land.

The Wiseco pistons offer an anti-friction skirt coating, an .043-inch/.043-inch/3.0mm ring pack for efficency. We opted for the 22cc reverse dome to keep compression around the stock 10.5:1

The factory variable oil pump assembly was retained, as was the factory cast 8-quart oil pan — fitted with oil drain fittings — as the OEM pump has unique clearance demands. The front cover is a billet aluminum piece, which is part of the Indy Power Products front drive kit, which we’ll discuss a little further on in the article. But with that, our stock-displacement short-block for the giveaway engine was wrapped up on day-one of the show.

Wiseco's box strut design necessitated a slight bending of the OEM oil squirters to clear the pistons at the bottom of their stroke. That was easily accomplished with gentle pressure from a pry bar.

A Monstrous Top End And Valvetrain

While we maintained the OEM displacement, we will be moving a lot of air, above and beyond the factory 7.3 liters of displacement. In order to flow the air, we utilized the factory cylinder heads that have been kissed by Late Model Engines’ CNC department, to clean up the intake and exhaust ports and eliminate the pushrod bumps in the airflow.

The factory chambers were left as-is, along with the OEM valve sizes of 2.170 inches on the intake and 1.660 inches on the exhaust. However, LME did upgrade the valve guides in these heads. To seal the top end, Cometic’s .040-inch five-layer head gaskets were utilized, along with a set of OptiTorque Torquemaster head studs — a combination proven to withstand serious boost.

LME only lightly skimmed the intake and exhaust ports, save for really taking down the pushrod bump in the port from the factory. The valves and chambers were left stock, with the factory 2.170-inch intake and 1.660-inch exhaust valves.

Getting into the valvetrain, the core of the engine’s brain is a Callies Performance camshaft. Using the “012” grind (P/N: 175-012), we have 238 degrees of duration at .050-inch on the intake and 246 degrees on the exhaust. With the factory rocker ratio of 1.8:1, the valves peak at .635 inch of lift on both the intake and exhaust, with a 116-degree Lobe Separation Angle. With this much camshaft, a Willis Performance VVT lockout kit from Indy Power Products was utilized.

EngineLabs Giveaway Engine camshaft

We used Klotz assembly lube all throughout the assembly process. Here you can see it on the lobes of the Callies camshaft being inserted.

To translate the cam lobes’ shape into vertical motion, a set of Johnson hydraulic roller tie-bar lifters were used. These feature .095 inch of travel and a body diameter of .842 inch. Riding on top of those lifters are a set of Manton’s 3/8-inch Series-5 8.450-inch pushrods. Made from seamless 4130 chromoly tubing with a .145-inch wall-thickness, these pushrods will handle anything this combination can throw at it with minimal deflection.

The giveaway engine valvetrain is a robust mix of Johnson hydraulic roller lifters, Manton 3/8-inch .145-inch-wall pushrods, and upgraded factory rocker arms with PAC conical valvesprings.

Translating cam motion to valve motion are the OEM 1.8:1 rocker arms with a Manton trunnion upgrade installed in them. Controlling the valves are a set of PAC Racing Springs conical valve springs along with the OEM locks and retainers. Topping off the cylinder heads are a set of LME’s gorgeous billet aluminum valve covers. Finishing off the giveaway engine long-block is an ATI Performance Super Damper. The SFI-approved elastomer torsional damper is a common sight amongst the high-end builds coming out of LME’s shop, for good reason.

EngineLabs Giveaway Engine balancer

Here, you can see the billet Indy Power Products front cover along with the ATI Super Damper being installed. We’re making sure we give away top-shelf products on this engine.

Topping off the Combination

There’s no denying that one of the most recognizable features of the Godzilla engine is the “unique” intake manifold design, which was built to clear the obstacles inside of an F-250 engine bay. Getting rid of that OEM manifold, we opted for one of Brian Tooley Racing’s new Trinity manifolds for the Godzilla. Trinity refers to the three-piece design, which allows the runners to be removed from the plenum. This makes porting easy, and also allows for different runner designs to be utilized with a common plenum.

Here, you can see the bungs on the runners for secondary injectors or nitrous nozzles, along with a shot inside of the Trinity plenum.

The runner sections also have mounting bosses for secondary injectors (or nitrous nozzles), should you want to add them. The plenum has a large opening and mounting pattern for LS throttle bodies, in order to allow for a large selection of readily available units right out of the gate. The fuel injectors actually fit into bosses in the head rather than the intake manifold, and for this application, a set of Deatschwerks 1,500cc were fitted. These injectors flow more than enough Boostane E85 to meet the 1,000-horsepower goal.

EngineLabs Giveaway Engine long block

The Trinity intake has an LS bolt pattern for the throttle body to expand the user’s options. Also note the complete Indy front drive kit, with alternator, power steering, and air conditioning compressor.

With the intake manifold on, we moved on to the rest of the front drive accessories from Indy Power Products. These include a Powermaster alternator mounted high on the driver’s side, a Turn 1 power steering pump opposite that on the passenger’s side, an air conditioning compressor low on the passenger side, and then one of the cooler features of the Indy kit, a 1994-’95 Mustang reverse-rotation water pump. Another cool feature of the kit is that the front cover has most of the mounts machined into it, greatly reducing the amount of bracketry needed for the components, and tucking them into a nice, compact package.

EngineLabs Giveaway Engine spark plugs

We’re using E3 spark plugs to light the fires in this engine.

Spinning the Turbos

The final piece of the giveaway engine puzzle came together on the final day of the PRI Show, and that was the turbo system. We started with a pair of Kooks upwards-swept forward-facing stainless turbo manifolds. Designed to fit the Godzilla engine into a Fox body, the all stainless-steel 1-3/4-inch primaries help get spent gases out of the engine and to the hot side of the turbocharger as efficiently as possible.

EngineLabs Giveaway Engine turbo manifold

The Kooks manifolds are designed to fit the Godzilla engine into a Fox Body chassis. A good bit of information for the eventual winner of the giveaway engine.

Attached to the headers are a set of connector pipes fabricated by AldoWelds, which not only have T4 flanges to attach to the turbochargers but also a well-designed wastegate flange that puts a pair of Precision Turbo 66mm wastegates (one on either bank) right in the exhaust stream for optimum boost control. The piece(s) de resistance are the Turbonetics 6473 turbochargers.

You can see how AldoWelds placed the wastegate flange in the exhaust stream, which will help the wastegates provide better boost control.

Fitted with a billet compressor wheel with a 64mm inducer and 84mm exducer diameter, as the name suggests, the turbine wheel has an 80mm inducer and 73mm exducer diameter. The twin-scroll T4 turbine housing features a 1.00 A/R ratio and the compressor cover has a 4.00-inch inlet diameter with anti-surge slots with a 2.50-inch outlet. The journal-bearing turbochargers should provide plenty of boost to make our desired 1,000 horsepower from the giveaway engine.

EngineLabs Giveaway Engine turbocharger 6473

The Turbonetics 6473 is a new release from the company, offering a 64mm compressor and 73mm turbine, with a 1.00 A/R ratio. These should provide more than enough air for our 1,000-horsepower goal.

Wrapping the hot side of the turbochargers are a pair of DEI’s Titanium Turbo Shields. Designed as a custom-fit heat management solution, the blankets keep heat in the turbos and out of the engine bay. While the cold side wasn’t at the show, it will feature a pair of Precision Turbo 50mm blow-off valves to make sure that when the throttle blade closes, all of the boost is efficiently vented.

The exhaust pipes for the 66mm wastegate and the exhaust side of the turbo have quite a bit of thought put into them, not to mention the jewelry-quality welds.

And with that, the engine was complete by noon on day-three of the show. Now, all that’s left is to have AldoWelds fabricate the cold side, and get the combination onto LME’s dyno to see how much power we can make with these turbos. After such a stout performance on the baseline dyno, the team is confident that the 1,000-horsepower mark is going to be easily achieved, with plenty of room to grow. So stay tuned as we bring you behind the scenes of the turbo kit’s fabrication and the final dyno of the engine.

The awesome EngineLabs’ giveaway engine journey to 1,000 horsepower, as well as one lucky fan’s dream, is made possible thanks to our partners in this project: Summit Racing Equipment, Late Model Engines, Ford Performance Parts, Mountain Top, ATI Performance Products, BOOSTane, Brian Tooley Racing, Callies Performance Products, Cometic Gasket, DeatschWerks, Design Engineering, E3 Spark Plugs, Indy Power Products, Johnson Lifters, K1 Technologies, Klotz Synthetics, Kooks Headers, Operational Speed Supply, Precision Turbo, Ryno Classifieds, SCT, Wiseco Pistons, and Wrenchers.

EngineLabs Giveaway Engine

This giveaway engine is an absolute work of art, and will give the winner a whole lot of smiles. Now all that’s left is to dyno it and ship it to the eventual winner.

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About the author

Greg Acosta

Greg has spent eighteen years and counting in automotive publishing, with most of his work having a very technical focus. Always interested in how things work, he enjoys sharing his passion for automotive technology with the reader.
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